Fast conversion of lithium (poly)sulfides in lithium-sulfur batteries using three-dimensional porous carbon.

ABSTRACT: The slow redox kinetics of polysulfide hinders the rapid and complete conversion between soluble polysulfides and Li₂S₂/Li₂S, resulting in unsatisfactory rate and cycle performance in lithium-sulfur batteries. Electrochemical catalysis, one effective method, promotes the reaction kinetics and inhibits the "shuttle effect". Here, we present a three-dimensional ordered macro-porous carbon with abundant cobalt-nitrogen-carbon active sites as a matrix catalyst, leading to accelerated polysulfide redox kinetics. In addition, the interconnected conductive frameworks with ordered macro-porous carbon afford fast ion/electron transport and provide sufficient space to adapt to the volume expansion of the sulfur electrode. Owing to the aforementioned advantages, a lit

SUBMITTER: Liang X 

PROVIDER: S-EPMC9037002 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature