Entrapment of Polysulfides by a Black-Phosphorus-Modified Separator for Lithium-Sulfur Batteries.

Sun, Jie; Sun, Yongming; Pasta, Mauro; Zhou, Guangmin; Li, Yuzhang; Liu, Wei; Xiong, Feng; Cui, Yi · Adv Mater · 2016

basic_science · Level V

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Abstract

A bifunctional separator modified by black-phosphorus nanoflakes is prepared to overcome the challenges associated with the polysulfide diffusion in lithium-sulfur batteries. It brings the benefits of the entrapment of various sulfur species via the strong binding energy and re-activation of the trapped sulfur species due to its high electron conductivity as well as Li-ion diffusivity.