The UK Hydrogen Strategy has set out an ambitious plan to develop GW-scale low-carbon hydrogen production by 2030, which is a crucial step to support the transition to net zero by 2050. Future development of GW-scale green hydrogen production requires substantial cost reduction of electrolysis technology. Existing proton exchange membrane (PEM) electrolysers have technical drawbacks and are limited by the expensive Nafion membranes and electrocatalysts. Anion exchange membrane water electrolysis is one of the most promising electrolysis technologies. However, fundamental research is required to advance AEM technology, particularly in the development of hydrocarbon membranes and electrocatalysts which can catalyse the performance of the systems. The overall objective of this project is to develop a high-performance, cost-effective and durable anion exchange membrane (AEM) water electrolysis technology. One key challenge is to fabricate membranes with high hydroxide conductivity, good mechanical stability and resistance to chemical deterioration at high temperatures. The lack of effective hydroxide exchange membranes is one of the major obstacles to the development of anion exchange membrane water electrolyser. We will synthesise new generation of polymer membranes to achieve high ionic conductivity and stability. At the same time, although inexpensive and ubiquitous non-precious metal catalysts can be used in AEM electrolysers, currently the activity of these catalysts could be improved. Hence, new electrocatalysts with high reactivity and durability will also be synthesized and paired with newly developed membranes and ionomer binders to form structured membrane electrode assemblies. Our ambition is to advance the development of cost-effective hydrogen generation technologies and ultimately will contribute to UK's plan to achieve net zero emissions by 2050.

Electro-chemical devices (fuel cells, electrolysers etc) are at the forefront of the drive to a 'net-zero world' with hydrogen as an important energy storage medium and fuel for the application of sustainably derived electricity. Even with the projected development of the energy system towards a largely fossil-fuel free system, CO2 separation will continue to be required for chemical processes. The work proposed builds on the collaboration between the Universities on Manchester, Newcastle and UCL which has flourished over the past five years, to develop more efficient and robust technologies to achieve a carbon negative industrial landscape. The ability to operate fuel cells at higher temperatures without humidification means that the amount of equipment needed and hence cost is reduced. It also means that potentially cheaper catalysts can be used, and the purity of the fuel does not need to be rigorously controlled, all of which leads to cheaper and more efficient systems. The overlap between fuel cells and electrolysers is very significant as an electrolyser is simply a fuel cell in reverse; as such similar problems are manifest. In addition, an exciting electrochemical process for gas separation (CO2 removal) is under development, again with significant overlap in terms of developmental challenges. This proposal builds a team of researchers with complimentary skills to tackle the challenges highlighted. The synergies between the very high-level characterisation expertise to examine the processes taking place in the systems, coupled with the electro-chemical developments which are on-going, mean that development and optimisation can take place quickly with understanding being shared to tackle the overlapping nature of the obstacles to implementation of these vital technologies.

Clean energy needs to be stored in an efficient and safe configuration to help improve the environment. Li-ion batteries still dominate the electrochemical energy storage market, however, they have disadvantages of relatively high cost, potential explosion and complicated manufacture. The demands for more sustainable and safer battery technologies are constantly increasing and the utilisation of energy storage devices under severe environments are required to satisfy practical applications. Aqueous battery systems have remarkable potential as next-generation energy storage devices because the cost of raw materials can be reduced, the battery can be fabricated in a more sustainable and facile process and explosive accidents can be avoided. Zn-ion batteries in aqueous/hydrogel electrolyte are favourable candidates due to their relatively low cost and safety advantages. Importantly, Zn-ion batteries can be a ready-to-use technique for all battery companies as they can use the same battery fabrication facilities as Li-ion batteries. However, the specific capacity, energy and power density of current Zn-ion batteries are restricted due to the relatively large hydrated zinc ions and high polarization of bivalent zinc ions. Therefore, the development on the cathodes of Zn-ion batteries have been motivated. Manganese oxide-based materials are favourable due to their suitable structures, abundant and cost-effective properties, environmentally friendly nature and a large working voltage window. But the problems such as limited intercalated channels, poor stability during battery charge/discharge processes, unclarified and complicated mechanism and low electron conductivity of manganese oxide-based cathodes need to be solved, thus the innovation of structures for manganese oxide-based cathodes calls for further exploration. In the SENSE project, manganese-based cathode materials coupled with suitable hydrogel electrolytes for Zn-ion batteries will be designed via multi-level structural engineering to utilise them under harsh conditions, for the purpose of innovating inexpensive and high-performance devices. Through collaborations with both academic and industrial partners, state-of-the-art materials and device characterisation techniques will be used to understand the underlying mechanisms for battery behaviours. After successfully fulfilling SENSE, Zn-ion batteries can exhibit a volumetric energy density of > 650 Wh L-1 and a power density of > 220 W L-1. The energy price of which can be estimated as £50/kWh, lower than that of Li-ion batteries (£126/kWh), and Ni-Fe batteries (£58/kWh). Therefore, SENSE will not only help advance the quality of battery research and innovative efforts in the UK, but also strengthen and stimulate the development of new technologies in the UK battery industry.

The EPSRC Centre for Doctoral Training (CDT) in Engineering Hydrogen Net Zero will develop the necessary networking, training and skills in future doctoral level leaders to enable rapid growth in hydrogen-related technology to meet the UK government's 2050 net zero targets. This CDT is a partnership of three world class Universities and around 40 Industrial and Civic organisations. The CDT aims to address the challenging aspects of rapid growth in hydrogen production and usage such as cost, supply and waste chain development, scalability, different system configurations, new technology, and social requirements through a blended cohort co-creation approach. The CDT will provide mandatory and optional training in Fundamental Knowledge, Thinking Innovatively, Business Acumen and Equity, Diversity, Inclusion, and Community (EDIC). A cohort based CDT is most appropriate for embedding skills in Engineering Hydrogen Net Zero due to the breadth of the training needs and the need for co-support and co-learning. In addition to a tailored co-created skills training program, the CDT will engage with partners to address key research priority areas. The CDT research plans are aligned with the EPSRC's "Engineering Net Zero" research priority, aiming to engineer low-cost hydrogen for net zero. Decarbonisation is not just implementation of a single solution fits all but a complex process of design that is dependent on what is being decarbonised e.g. different types of chemical industry to whether or not there is future access to a hydrogen hub. This results in the requirement for many new solutions to ensure affordability, scalability and sustainability. This includes undertaking research on hydrogen into topics such as, design for scalability, hydrogen on demand, new low cost materials, new interfaces, new processes, new storage means, new energy interactions, new waste management, existing infrastructure adaption and lifespan monitoring and management and social acceptance. The CDT will work with industry and civic partners to generate impact through innovation through research. This will include direct financial benefits, improved policy outcomes through engagement with local authorities, government organizations, and standards bodies, enhanced public engagement and acceptance of hydrogen, and create employment opportunities for students with industry-ready skills. The CDT represents an excellent opportunity for students to work together, with industry and with world leading international experts on impactful projects for a common decarbonisation goal with multifunctional stakeholders. This CDT will build upon the experience of the University partners and the lessons learnt from participation in 7 previous CDT's to bring forward best practice (e.g. buddy scheme and childcare funding) and remove roadblocks to opportunities (e.g. timetable clashes). We will co-create a CDT with international reach and access to over £55m worth of hydrogen and wind turbine demonstrator and research facilities. The team has excellent links with Universities and Industry internationally including partners in Europe, Canada, Malawi, China, USA, Brazil and Australia. CDT students will have opportunities to learn from International experts at a summer design and build, link with world leading experts to build international networks of contacts, undertake CPD activities (such as partner site visits), attend national and international conferences & partners secondments, research sandpits and webinars. All activities will be undertaken with due care, diligence & best practice in EDIC. The academic, industrial and civic team has the expertise to deliver the vision of the co-created CDT through the development of a unique research and training program.

Clean energy needs to be stored in an efficient and safe configuration to help improve the environment. Li-ion batteries still dominate the electrochemical energy storage market, however, they have disadvantages of relatively high cost, potential explosion and complicated manufacture. The demands for more sustainable and safer battery technologies are constantly increasing and the utilisation of energy storage devices under severe environments are required to satisfy practical applications. Aqueous battery systems have remarkable potential as next-generation energy storage devices because the cost of raw materials can be reduced, the battery can be fabricated in a more sustainable and facile process and explosive accidents can be avoided. Zn-ion batteries in aqueous/hydrogel electrolyte are favourable candidates due to their relatively low cost and safety advantages. Importantly, Zn-ion batteries can be a ready-to-use technique for all battery companies as they can use the same battery fabrication facilities as Li-ion batteries. However, the specific capacity, energy and power density of current Zn-ion batteries are restricted due to the relatively large hydrated zinc ions and high polarization of bivalent zinc ions. Therefore, the development on the cathodes of Zn-ion batteries have been motivated. Manganese oxide-based materials are favourable due to their suitable structures, abundant and cost-effective properties, environmentally friendly nature and a large working voltage window. But the problems such as limited intercalated channels, poor stability during battery charge/discharge processes, unclarified and complicated mechanism and low electron conductivity of manganese oxide-based cathodes need to be solved, thus the innovation of structures for manganese oxide-based cathodes calls for further exploration. In the SENSE project, manganese-based cathode materials coupled with suitable hydrogel electrolytes for Zn-ion batteries will be designed via multi-level structural engineering to utilise them under harsh conditions, for the purpose of innovating inexpensive and high-performance devices. Through collaborations with both academic and industrial partners, state-of-the-art materials and device characterisation techniques will be used to understand the underlying mechanisms for battery behaviours. After successfully fulfilling SENSE, Zn-ion batteries can exhibit a volumetric energy density of > 650 Wh L-1 and a power density of > 220 W L-1. The energy price of which can be estimated as £50/kWh, lower than that of Li-ion batteries (£126/kWh), and Ni-Fe batteries (£58/kWh). Therefore, SENSE will not only help advance the quality of battery research and innovative efforts in the UK, but also strengthen and stimulate the development of new technologies in the UK battery industry.