Ferroelectric-Enhanced Polysulfide Trapping for Lithium-Sulfur Battery Improvement

Keyu Xie; You You; Kai Yuan; Wei Lu; Kun Zhang; Fei Xu; Mao Ye; Shanming Ke; Chao Shen; Xierong Zeng; Xiaoli Fan; Bingqing Wei

doi:10.1002/adma.201604724

Ferroelectric-Enhanced Polysulfide Trapping for Lithium-Sulfur Battery Improvement

Adv Mater. 2017 Feb;29(6). doi: 10.1002/adma.201604724. Epub 2016 Dec 5.

Authors

Keyu Xie¹, You You¹, Kai Yuan¹, Wei Lu², Kun Zhang¹, Fei Xu¹, Mao Ye³, Shanming Ke³, Chao Shen¹, Xierong Zeng³, Xiaoli Fan¹, Bingqing Wei⁴

Affiliations

¹ State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an, 710072, China.
² University Research Facility in Materials Characterization and Device Fabrication, The Hong Kong Polytechnic University, Hong Kong, China.
³ Shenzhen Key Laboratory of Special Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.
⁴ Department of Mechanical Engineering, University of Delaware, Newark, DE, 19716, USA.

PMID: 27918119
DOI: 10.1002/adma.201604724

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 (BaTiO₃ nanoparticles) into the cathode, the heteropolar polysulfides can be anchored within the cathode due to the internal electric field originated from the spontaneous polarization BaTiO₃ nanoparticles, and thus significantly improving the cycle stability of Li-S batteries.

Keywords: BaTiO3 nanoparticles; additives; ferroelectric effect; lithium-sulfur batteries; polysulfides.