Mesoporous Ti4 O7 Nanosheets with High Polar Surface Area for Catalyzing Separator to Reduce the Shuttle Effect of Soluble Polysulfides in Lithium-sulfur Batteries

Chuang-An Zhou; Xiuyu Sun; Wei Yan; Yinze Zuo; Jiujun Zhang

doi:10.1002/asia.202200328

Mesoporous Ti₄ O₇ Nanosheets with High Polar Surface Area for Catalyzing Separator to Reduce the Shuttle Effect of Soluble Polysulfides in Lithium-sulfur Batteries

Chem Asian J. 2022 Jul 15;17(14):e202200328. doi: 10.1002/asia.202200328. Epub 2022 May 23.

Authors

Chuang-An Zhou¹, Xiuyu Sun¹, Wei Yan², Yinze Zuo¹, Jiujun Zhang^{1

2}

Affiliations

¹ Institute for Sustainable Energy/College of Sciences, Shanghai Unversity, Shanghai, 200444, P. R. China.
² College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, P. R. China.

PMID: 35586952
DOI: 10.1002/asia.202200328

Abstract

In the effort to accelerate adsorption and catalytic conversion of lithium polysulfides (Li-PSs) and suppress the shuttle effect of lithium-sulfur batteries (LSBs), the Ti₄ O₇ nanosheets/carbon material-modified separator is successfully fabricated to reducing soluble Li-PSs' crossover from cathode to anode. The catalyst of mesoporous Ti₄ O₇ nanosheets with O-Ti-O units synthesized at low temperature shows both excellent conductivity and high surface area. The modified separator can serve as a diffusion barrier of Li-PSs and catalyst for converting soluble low-chain sulfides into insoluble ones and then remarkably enhance the sulfur utilization and electrochemical performance of the LSB. This work provides a feasible avenue in both design and synthesis of mesoporous catalyst materials for suppressing the shuttle effect of lithium-sulfur batteries.

Keywords: Lithium-sulfur battery; Mesoporous nanosheets; Modified separator; Ti4O7; catalyst; shuttle effect.

Abstract

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