Strong Sulfur Binding with Conducting Magnéli-Phase Ti  n  O 2 n –1  Nanomaterials for Improving Lithium–Sulfur Batteries

Tao, Xinyong; Wang, Jianguo; Ying, Zhuogao; Cai, Qiuxia; Zheng, Guangyuan; Gan, Yongping; Huang, Hui; Xia, Yang; Liang, Chu; Zhang, Wenkui; Cui, Yi

doi:10.1021/nl502331f

articleNano LettersAug 4, 2014Closed access

Strong Sulfur Binding with Conducting Magnéli-Phase Ti n O 2 n –1 Nanomaterials for Improving Lithium–Sulfur Batteries

XTXinyong Tao JWJianguo Wang ZYZhuogao Ying QCQiuxia Cai GZGuangyuan Zheng

Zhejiang University of Technology · SLAC National Accelerator Laboratory

PubMed

Indexed incrossrefpubmed

Abstract

Lithium-sulfur batteries show fascinating potential for advanced energy storage systems due to their high specific capacity, low-cost, and environmental benignity. However, the shuttle effect and the uncontrollable deposition of lithium sulfide species result in poor cycling performance and low Coulombic efficiency. Despite the recent success in trapping soluble polysulfides via porous matrix and chemical binding, the important mechanism of such controllable deposition of sulfur species has not been well understood. Herein, we discovered that conductive Magnéli phase Ti4O7 is highly effective matrix to bind with sulfur species. Compared with the TiO2-S, the Ti4O7-S cathodes exhibit higher reversible capacity…

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Topics & keywords

Topics

Keywords

Sulfur
Lithium–sulfur battery
Faraday efficiency
Adsorption
Deposition (geology)
Chemical engineering
Density functional theory
Phase (matter)

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