Carbon‐Coated Porous Hollow Silicon Microspheres for High‐Capacity and Durable Lithium Storage

Author:

Yang Yumei1,He Ruhan1,Zhuang Dingyue1,Chen Ran1,Li Qi2,Mai Liqiang134ORCID,Zhou Liang134ORCID

Affiliation:

1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Luoshi Road 122 430070 Wuhan P. R. China

2. Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory 528216 Foshan P. R. China

3. Hubei Longzhong Laboratory Wuhan University of Technology (Xiangyang demonstration zone) 441000 Xiangyang Hubei P. R. China

4. Hainan Institute Wuhan University of Technology 572000 Sanya P. R. China

Abstract

AbstractSilicon‐based materials are promising lithium‐ion battery (LIB) anodes owing to their natural abundance and high capacity. However, their practical application is restricted by the poor electrical conductivity and large volume expansion. Herein, we successfully construct carbon coated porous hollow silicon microspheres (Si‐40@C) as LIB anode materials, which are derived from the acid etching of commercial AlSi alloy with subsequent chemical vapor deposition carbon coating. The porous hollow structure of Si‐40@C buffers the volume variation and promotes the transportation of Li+; the carbon coating enhances the overall conductivity as well as structural stability. The as‐prepared Si‐40@C porous hollow microspheres deliver a high reversible capacity (2029 mAh g−1 at 0.2 A g−1), good cyclability (1668 mAh g−1 after 100 cycles at 0.2 A g−1), and an ideal rate capability (1200 mAh g−1 at 10 A g−1).

Funder

Wuhan University of Technology

Publisher

Wiley

Subject

Materials Chemistry,Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Biomaterials

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