PPy‐encapsulated SnS<sub>2</sub> Nanosheets Stabilized by Defects on a TiO<sub>2</sub> Support as a Durable Anode Material for Lithium‐Ion Batteries

Angewandte Chemie - International Edition - Tập 58 Số 3 - Trang 811-815 - 2019
Ling Wu1,2, Jie Zheng3,2, Liang Wang4,2, Xunhui Xiong3, Yanyan Shao5, Gang Wang3, Jeng‐Han Wang5, Shengkui Zhong1, Minghong Wu4
1School of Iron and Steel, Soochow University, Suzhou, 215021 P. R. China
2these authors contributed equally to this work
3Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China
4Institute of Nanochemistry and Nanobiology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, P. R. China.
5Department of Chemistry, National Taiwan Normal University, Taipei, 11677, Taiwan

Tóm tắt

AbstractNanostructured‐alloy‐type anodes have received great interest for high‐performance lithium‐ion batteries (LIBs). However, these anodes experience huge volume fluctuations during repeated lithiation/delithiation and are easily pulverized and subsequently form aggregates. Herein, an efficient method to stabilize alloy‐type anodes by creating defects on the surface of the metal oxide support is proposed. As a demonstration, PPy‐encapsulated SnS2 nanosheets supported on defect‐rich TiO2 nanotubes were produced and investigated as an anode material for LIBs. Both experimental results and theoretical calculations demonstrate that defect‐rich TiO2 provides more chemical adhesions to SnS2 and discharge products, compared to defect‐poor TiO2, and then effectively stabilizes the electrode structure. As a result, the composite exhibits an unprecedented cycle stability. This work paves the way to designing durable and active nanostructured‐alloy‐type anodes on oxide supports.

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Angewandte Chemie - International Edition

Tập 58 Số 3

811-815

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