Ferroelectric-Enhanced Polysulfide Trapping for Lithium-Sulfur Battery Improvement.

Xie, Keyu; You, You; Yuan, Kai; Lu, Wei; Zhang, Kun; Xu, Fei; Ye, Mao; Ke, Shanming et al. · Adv Mater · 2017

basic_science · Level V

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Abstract

A brand new polysulfide entrapping strategy based on the ferroelectric effect has been demonstrated for the first time. By simply adding the nano-ferroelectrics (BaTiO<sub>3</sub> nanoparticles) into the cathode, the heteropolar polysulfides can be anchored within the cathode due to the internal electric field originated from the spontaneous polarization BaTiO<sub>3</sub> nanoparticles, and thus significantly improving the cycle stability of Li-S batteries.