A mesoporous tungsten carbide nanostructure as a promising cathode catalyst decreases overpotential in Li-O₂ batteries.

ABSTRACT: Lithium-oxygen (Li-O₂) batteries as promising energy storage devices possess high gravimetric energy density and low emission. However, poor reversibility of electrochemical reactions at the cathode significantly affects the electrochemical properties of nonaqueous Li-O₂ batteries, and low charge-discharge efficiency also results in short cycle-life. In this work, functional air cathodes containing mesoporous tungsten carbide nanoparticles for improving the reversibility of positive reactions in Li-O₂ cells are designed. Mesoporous tungsten carbides are synthesized with mesoporous carbon nitride as the reactive template and carbon source. And mesoporous tungsten carbides in cathode materials display better electrochemical performance in Li-O₂ cel

SUBMITTER: Liu S 

PROVIDER: S-EPMC9084176 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature