Title

Fire-Retardant, Stable-Cycling and High-Safety Sodium Ion Battery

Publication Name

Angewandte Chemie - International Edition

Abstract

The safety of energy storage equipment has always been a stumbling block to the development of battery, and sodium ion battery is no exception. However, as an ultimate solution, the use of non-flammable electrolyte is susceptible to the side effects, and its poor compatibility with electrode, causing failure of batteries. Here, we report a non-flammable electrolyte design to achieve high-performance sodium ion battery, which resolves the dilemma via regulating the solvation structure of electrolyte by hydrogen bonds and optimizing the electrode–electrolyte interphase. The reported non-flammable electrolyte allows stable charge-discharge cycling of both sodium vanadium phosphate@hard carbon and Prussian blue@hard carbon full pouch cell for more than 120 cycles with a capacity retention of >85 % and high cycling Coulombic efficiency (99.7 %).

Open Access Status

This publication is not available as open access

Funding Number

51971124

Funding Sponsor

National Natural Science Foundation of China

COinS
 

Link to publisher version (DOI)

http://dx.doi.org/10.1002/anie.202112382