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description Publicationkeyboard_double_arrow_right Article 2022Publisher:Wiley doi: 10.1002/er.7726
International Journa... arrow_drop_down International Journal of Energy ResearchArticle . 2022 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/er.7726&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 4 citations 4 popularity Average influence Average impulse Average Powered by BIP!
more_vert International Journa... arrow_drop_down International Journal of Energy ResearchArticle . 2022 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/er.7726&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2015Publisher:Elsevier BV Shuhai Yu; Hua Tian; Gequn Shu; Qianshan Li; Hai Diao;Zhiqiang Niu;
Zhiqiang Niu
Zhiqiang Niu in OpenAIREQing Du;
Kui Jiao;
Kui Jiao
Kui Jiao in OpenAIREAbstract Multidimensional numerical models are useful tools for understanding the heat transfer mechanisms and performance optimization of thermoelectric generators (TEGs). In this study, two three-dimensional numerical models are developed for TEGs based on different formulations, but with similar abilities for heat and electricity transfer analysis and performance prediction. Model 1 solves the conservation equations of the Seebeck potential and the Ohmic potential separately, and the total built-in potential can be obtained based on the solved Seebeck and Ohmic potentials. Model 2 solves the conservation equation of the total built-in potential directly, and the conservation equation for the Ohmic potential is also solved. The comparison between Model 1 and Model 2 shows that Model 2 is slightly more precise for power output prediction. The detailed formulations of these two models are described, and the difference among the present and previous models is also discussed. Some important modeling aspects are elucidated for the TEG models, such as the conservation equations and boundary conditions. Parametric studies are carried out based on various thermal boundary conditions. The influence of the TEG semiconductor shape on performance is investigated in details. It is found that for the nearly same volume of semiconductor materials, changing the shape from normal cuboid (constant cross-sectional area) to hexahedrons (variable cross-sectional area) could increase the power output significantly. The reason is that the temperature gradient could be enhanced when proper variable cross-sectional areas are used.
International Journa... arrow_drop_down International Journal of Heat and Mass TransferArticle . 2015 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ijheatmasstransfer.2015.01.107&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu52 citations 52 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
more_vert International Journa... arrow_drop_down International Journal of Heat and Mass TransferArticle . 2015 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ijheatmasstransfer.2015.01.107&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2017Publisher:Elsevier BV Hao Deng; Ting Guo;Kui Jiao;
Jing Sun; Jing Sun;Kui Jiao
Kui Jiao in OpenAIREJunfeng Zhang;
Xuri Huang; Xu Xie;Junfeng Zhang
Junfeng Zhang in OpenAIREAbstract A transient model is presented to investigate the transport phenomena for passive vapor-feed direct methanol fuel cell (DMFC). The pervaporation membrane and vapor transport layer are considered for the formation and transport of methanol vapor, respectively. We attempt to provide insight into the transient mass transport characteristics of DMFCs by testing different operation conditions, including current density, open area ratio of the vaporizer, and membrane thickness. The results show that the methanol crossover rate and water transport from the cathode to the anode are the key factors for improving the cell performance, and indicate that fuel efficiency, energy efficiency and energy density of the DMFCs are improved by increasing current density, decreasing open ratio of the vaporizer or increasing membrane thickness due to the reduced methanol crossover rate. The cathode micro-porous layer (MPL) is useful in enhancing water recovery flux and decreasing water losses.
International Journa... arrow_drop_down International Journal of Hydrogen EnergyArticle . 2017 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ijhydene.2016.10.122&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu16 citations 16 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert International Journa... arrow_drop_down International Journal of Hydrogen EnergyArticle . 2017 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ijhydene.2016.10.122&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2016Publisher:Elsevier BV Authors:Qing Du;
Kui Jiao;
Kui Jiao
Kui Jiao in OpenAIREGuobin Zhang;
Guobin Zhang
Guobin Zhang in OpenAIREZhiqiang Niu;
+3 AuthorsZhiqiang Niu
Zhiqiang Niu in OpenAIREQing Du;
Kui Jiao;
Kui Jiao
Kui Jiao in OpenAIREGuobin Zhang;
Guobin Zhang
Guobin Zhang in OpenAIREZhiqiang Niu;
Hua Tian; Gequn Shu; Hai Diao;Zhiqiang Niu
Zhiqiang Niu in OpenAIREAbstract We derive a power factor and an efficiency factor for comprehensive evaluation of thermoelectric generator (TEG) materials, and approve that only using the power factor (or efficiency factor) is sufficient to determine the output power (or thermoelectric conversion efficiency) potential of a material. We also show that the effect of thermal conductivity is underestimated in the traditionally used figure of merit. In fact, the traditionally used power factor and figure of merit are simplified versions of the new factors for the special “constant surface temperatures” condition (the heat transfer coefficients on the hot and cold sides are infinitely large), which rarely occurs in practical applications. These two new factors can be conveniently used for material evaluation and design optimization, for example, to determine the optimal interface temperature and length ratio of a segmented TEG.
International Journa... arrow_drop_down International Journal of Heat and Mass TransferArticle . 2016 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ijheatmasstransfer.2015.10.051&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu40 citations 40 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
more_vert International Journa... arrow_drop_down International Journal of Heat and Mass TransferArticle . 2016 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ijheatmasstransfer.2015.10.051&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2021 United KingdomPublisher:Royal Society of Chemistry (RSC) Funded by:UKRI | Smart Microfluidics Towar..., UKRI | UKRI Interdisciplinary Ce..., UKRI | The Faraday InstitutionUKRI| Smart Microfluidics Towards Low-Cost High-Performance Li-Ion Batteries ,UKRI| UKRI Interdisciplinary Centre for Circular Chemical Economy ,UKRI| The Faraday InstitutionAuthors:Jin Xuan;
Jin Xuan
Jin Xuan in OpenAIREValerie J. Pinfield;
Valerie J. Pinfield
Valerie J. Pinfield in OpenAIREDennis Y.C. Leung;
Huizhi Wang; +4 AuthorsDennis Y.C. Leung
Dennis Y.C. Leung in OpenAIREJin Xuan;
Jin Xuan
Jin Xuan in OpenAIREValerie J. Pinfield;
Valerie J. Pinfield
Valerie J. Pinfield in OpenAIREDennis Y.C. Leung;
Huizhi Wang;Dennis Y.C. Leung
Dennis Y.C. Leung in OpenAIREBilly Wu;
Billy Wu
Billy Wu in OpenAIREZhiqiang Niu;
Zhiqiang Niu;Zhiqiang Niu
Zhiqiang Niu in OpenAIREKui Jiao;
Kui Jiao
Kui Jiao in OpenAIREdoi: 10.1039/d1ee00398d
handle: 10044/1/89069
The digital transformation empowered by artificial intelligence will create huge opportunities for the porous energy materials research community.
Imperial College Lon... arrow_drop_down Imperial College London: SpiralArticle . 2021License: CC BYData sources: Bielefeld Academic Search Engine (BASE)Spiral - Imperial College Digital RepositoryArticle . 2021License: CC BYData sources: Spiral - Imperial College Digital Repositoryadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1039/d1ee00398d&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 39 citations 39 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
more_vert Imperial College Lon... arrow_drop_down Imperial College London: SpiralArticle . 2021License: CC BYData sources: Bielefeld Academic Search Engine (BASE)Spiral - Imperial College Digital RepositoryArticle . 2021License: CC BYData sources: Spiral - Imperial College Digital Repositoryadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1039/d1ee00398d&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2017Publisher:Elsevier BV Authors: Fenglai Yue; Guobin Zhang; Junhong Zhang;Jiewei Lin;
+1 AuthorsJiewei Lin
Jiewei Lin in OpenAIREFenglai Yue; Guobin Zhang; Junhong Zhang;Jiewei Lin;
Jiewei Lin
Jiewei Lin in OpenAIREKui Jiao;
Kui Jiao
Kui Jiao in OpenAIREAbstract A three-dimensional electrochemical-thermal coupling model of LiFePO4 battery was developed based on the real multi-layer structure. The model was developed to describe the discharge process of the battery in four modes: the constant current, constant overpotential, constant voltage and maximum power discharge processes. The electric conductivity of the electrode, the electric conductivity of the current collector, the ionic conductivity of the electrolyte and the diffusion coefficient of the electrolyte were considered. The results show that: (1) In the constant current discharge mode, the core electrochemical reaction area of the positive electrode moved towards the separator while that of the negative electrode moved towards the current collector due to the change of the electrolyte concentration. (2) In the constant overpotential discharge process, the change of the average chemical reaction rate and the decreasing rate of the current density increased with increasing overpotential. (3) In the constant voltage discharge process, the current density and the temperature increased when the electrode thickness was increased. (4) In the maximum power discharge process, the output power increased with increasing electrode thickness but decreased with increasing contact resistance at the same current density.
Applied Thermal Engi... arrow_drop_down Applied Thermal EngineeringArticle . 2017 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.applthermaleng.2017.07.151&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu9 citations 9 popularity Average influence Average impulse Top 10% Powered by BIP!
more_vert Applied Thermal Engi... arrow_drop_down Applied Thermal EngineeringArticle . 2017 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.applthermaleng.2017.07.151&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2017Publisher:Elsevier BV Abstract The effect of ionomer/carbon (I/C) ratio on proton exchange membrane (PEM) fuel cell cold start is investigated experimentally with theoretical water transport analysis. The scanning electron microscope (SEM) images show larger agglomerates and smaller effective reaction area by increasing the I/C ratio from 0.7 to 1.7. For normal operation, increasing the I/C ratio can improve the humidity tolerance, especially in the cathode. For cold start >−10 °C, a lower I/C ratio leads to better performance because the core reaction area is shifted towards the membrane, leading to more membrane water absorption and slower ice formation. For
International Journa... arrow_drop_down International Journal of Hydrogen EnergyArticle . 2017 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ijhydene.2017.02.183&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu63 citations 63 popularity Top 1% influence Top 10% impulse Top 10% Powered by BIP!
more_vert International Journa... arrow_drop_down International Journal of Hydrogen EnergyArticle . 2017 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ijhydene.2017.02.183&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2021 United KingdomPublisher:Springer Science and Business Media LLC Funded by:EC | VOLUMETRIQ, UKRI | Smart Microfluidics Towar...EC| VOLUMETRIQ ,UKRI| Smart Microfluidics Towards Low-Cost High-Performance Li-Ion BatteriesAuthors:Kui Jiao;
Kui Jiao
Kui Jiao in OpenAIREJin Xuan;
Jin Xuan
Jin Xuan in OpenAIREQing Du;
Zhiming Bao;
+10 AuthorsZhiming Bao
Zhiming Bao in OpenAIREKui Jiao;
Kui Jiao
Kui Jiao in OpenAIREJin Xuan;
Jin Xuan
Jin Xuan in OpenAIREQing Du;
Zhiming Bao;
Zhiming Bao
Zhiming Bao in OpenAIREBiao Xie;
Biao Xie
Biao Xie in OpenAIREBowen Wang;
Bowen Wang
Bowen Wang in OpenAIREYan Zhao;
Yan Zhao
Yan Zhao in OpenAIRELinhao Fan;
Linhao Fan
Linhao Fan in OpenAIREHuizhi Wang;
Huizhi Wang
Huizhi Wang in OpenAIREZhongjun Hou;
Zhongjun Hou
Zhongjun Hou in OpenAIRESen Huo;
Nigel P. Brandon;Sen Huo
Sen Huo in OpenAIREYan Yin;
Yan Yin
Yan Yin in OpenAIREMichael D. Guiver;
Michael D. Guiver
Michael D. Guiver in OpenAIREWith the rapid growth and development of proton-exchange membrane fuel cell (PEMFC) technology, there has been increasing demand for clean and sustainable global energy applications. Of the many device-level and infrastructure challenges that need to be overcome before wide commercialization can be realized, one of the most critical ones is increasing the PEMFC power density, and ambitious goals have been proposed globally. For example, the short- and long-term power density goals of Japan's New Energy and Industrial Technology Development Organization are 6 kilowatts per litre by 2030 and 9 kilowatts per litre by 2040, respectively. To this end, here we propose technical development directions for next-generation high-power-density PEMFCs. We present the latest ideas for improvements in the membrane electrode assembly and its components with regard to water and thermal management and materials. These concepts are expected to be implemented in next-generation PEMFCs to achieve high power density.
Nature arrow_drop_down Spiral - Imperial College Digital RepositoryArticle . 2021Data sources: Spiral - Imperial College Digital Repositoryadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1038/s41586-021-03482-7&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 2K citations 1,784 popularity Top 0.01% influence Top 0.1% impulse Top 0.01% Powered by BIP!
more_vert Nature arrow_drop_down Spiral - Imperial College Digital RepositoryArticle . 2021Data sources: Spiral - Imperial College Digital Repositoryadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1038/s41586-021-03482-7&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2017Publisher:Elsevier BV Sen Huo; Sen Huo; Travis Lee Smith; Jae Wan Park;Nathanial J. Cooper;
Nathanial J. Cooper
Nathanial J. Cooper in OpenAIREKui Jiao;
Kui Jiao
Kui Jiao in OpenAIREAbstract Metal foam has been regarded as one of the most important replacement for the conventional flow distributor of commercial fuel cells in recent years. One critical issue for the commercialization of proton exchange membrane (PEM) fuel cell is the successful startup from subzero temperatures. In this study, experimental tests on a PEM fuel cell using nickel metal foam as the cathode flow distributor are carried out to investigate the cold start performance. The cold start performance is also compared to a PEM fuel cell with parallel flow channels. Both galvanostatic and potentiostatic control are considered. The results show that under normal operating conditions the metal foam PEM fuel cell exhibits higher maximum net power density than the cell with parallel flow channels, whereas the parallel channel case exhibits slightly better performance at lower current densities. For cold start tests, metal foam is superior to the conventional parallel flow channel under galvanostatic control, due to its extremely porous structure, uniform mass and heat distribution. It is more difficult for PEM fuel cell under potentiostatic control to successfully start up due to possible ice blockage at the outlet.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.apenergy.2017.06.028&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu88 citations 88 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.apenergy.2017.06.028&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2019Publisher:Elsevier BV Abstract An analytical dynamic model is proposed to predict the cold start behavior of proton exchange membrane (PEM) fuel cell. Water phase transition mechanisms have been reconstructed based on the five states of water migrating in the fuel cell, composed of water vapor, super-cooled water (liquid water), ice, membrane water (water dissolved in solid electrolyte) and frozen membrane water, in order to explore the reasonable water production and phase transition mechanism. The general water transfer behavior during cold start operation of PEM fuel cell finally evolves into four stages: (1) unsaturated water in ionomer and membrane water production; (2) water in ionomer reaching saturation; (3) over-saturated water in ionomer and quick desorption into liquid and vapor in pores; and (4) significant ice formation. Both non-equilibrium and equilibrium methods to simulate phase transition have been carried out to reveal water transport characteristics in the cold start operation. The assumptions associated with the liquid water and vapor production in the electrochemical reaction extensively involved in the previous modeling studies in the literature should be cautiously used, especially for the dynamic modeling studies. It is worthwhile addressing that the liquid water inside the cathode CL follows the slow increasing and rapid decreasing trend during the cold start operation, which indicates that the liquid water should mostly freeze at the shut-down moment. Furthermore, water prefers to freeze on the interface between catalyst layer (CL) and micro-porous layer (MPL), leading to the liquid water accumulation here migrating towards the membrane side.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.apenergy.2018.10.068&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu107 citations 107 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.apenergy.2018.10.068&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu