High-power lithium-selenium batteries enabled by atomic cobalt electrocatalyst in hollow carbon cathode.

ABSTRACT: Selenium cathodes have attracted considerable attention due to high electronic conductivity and volumetric capacity comparable to sulphur cathodes. However, practical development of lithium-selenium batteries has been hindered by the low selenium reaction activity with lithium, high volume changes and rapid capacity fading caused by the shuttle effect of polyselenides. Recently, single atom catalysts have attracted extensive interests in electrochemical energy conversion and storage because of unique electronic and structural properties, maximum atom-utilization efficiency, and outstanding catalytic performances. In this work, we developed a facile route to synthesize cobalt single atoms/nitrogen-doped hollow porous carbon (Co_SA-HC). The cobalt single atoms can activate selenium

SUBMITTER: Tian H 

PROVIDER: S-EPMC7538427 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature