A Natural Polymer Captor for Immobilizing Polysulfide/Polyselenide in Working Li-SeS₂ Batteries.

ABSTRACT: SeS₂ has become a promising cathode material owing to its enhanced electrical conductivity over sulfur and higher theoretical specific capacity than selenium; however, the working Li-SeS₂ batteries have to face the practical challenges from the severe shuttling of soluble dual intermediates of polysulfide and polyselenide, especially in high-SeS₂-loading cathodes. Herein, a natural organic polymer, Nicandra physaloides pectin (NPP), is proposed to serve as an effective polysulfide/polyselenide captor to address the shuttling issues. Informed by theoretical calculations, NPP is competent to provide a Lewis base-based strong binding interaction with polysulfides/polyselenides via forming lithium bonds, and it can be homogeneously deposited onto a three-dimens

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC8021686 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature