A pyrolyzed polyacrylonitrile/selenium disulfide composite cathode with remarkable lithium and sodium storage performances.

ABSTRACT: As a special class of cathode materials for lithium-sulfur batteries, pyrolyzed polyacrylonitrile/sulfur (pPAN/S) can completely solve the polysulfide dissolution problem and deliver reliable performance. However, the applicable S contents of pPAN/S are usually lower than 50 weight % (wt %), and their capacity utilizations are not sufficient, both of which greatly limit their energy densities for commercial applications. We report a pyrolyzed polyacrylonitrile/selenium disulfide (pPAN/SeS₂) composite with dramatically enhanced active material content (63 wt %) and superior performances for both lithium and sodium storage. As a result, pPAN/SeS₂ delivers high capacity of >1100 mAh g^-1 at 0.2 A g^-1 for Li storage with extremely stable cycle life ov

SUBMITTER: Li Z 

PROVIDER: S-EPMC5993473 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature