• Energy Research

Li2TiSiO4with a 0.28 V operational potential may fill the gap between the present 0.1 V carbonaceous and the 1.5 V Li4Ti5O12electrodes.

Lithium-ion capacitors (LICs) have been considered as an advanced energy storage system owing to their high energy and power densities. However, their application in a wide temperature range is still a great challenge due to the reduced ionic conductivity of the electrolyte and the poor electric conductivity of the battery-type transition metal oxide electrodes. Herein, an all-climate LIC is well-fabricated with TiNb2O7@expanded graphite as the anode and activated carbon as the cathode in an optimized electrolyte, which can be operated within a wide temperature range from -60 to +55 °C. Benefitting from the synergetic effect of the improved electrode and electrolyte, the LIC exhibits an outstanding energy density of 119 W h kg-1 and a power density of 5110 W kg-1 based on the total mass of both negative and positive electrodes. Moreover, it can deliver a capacity retention of as high as 42% at -60 °C and function at a superior rate capability at a high temperature of +55 °C, which exhibits an all-climate feature and the potential for wide applications under some extreme conditions.

A lithium–sulfur (Li–S) battery has become a promising energy storage device because of its remarkable excellent specific capacity density and energy density. However, low sulfur utilization and sh...

The in situ structural evolution of the catalyst was successfully achieved by in situ electrochemical dealloying approach. Direct evidence of O–O bond formation was probed by operando ATR FT-IR, suggesting the direct O2 evolution mechanism.

A carbonate-based electrolyte is well-designedviaa multifunctional lithium difluorobis(oxalato) phosphate (LiDFBOP) additive, endowing 4.5 V sodium metal batteries with high energy density, excellent cycling stability and a wide temperature range.

FL-InSe/SWCNT flexible electrode exhibits much higher capacity than the theoretical capacity of InSe, which is attributed to the alloying of continuously formed In nanoclusters, the latter also provide additional adsorption capacity.

A new versatile single-ion electrolyte with a Grotthuss-like Li conduction mechanism is proposed to address the issue of Li metal batteries.

A comprehensive understanding of the challenges in zinc-electrode materials and fabrication that limit the continuous development of rechargeable zinc–air batteries.