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Synthesis of a Yolk-Shell Nanostructured Silicon-Based Anode for High-Performance Li-Ion Batteries

Xiangjie Yang, Weikang Kong, Guangyuan Du, Shilong Li, Yueyuan Tang, Jun Cao, Xueyi Lu, Rui Tan Orcid Logo, Guoyu Qian Orcid Logo

Batteries, Volume: 9, Issue: 9, Start page: 446

Swansea University Author: Rui Tan Orcid Logo

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DOI (Published version): 10.3390/batteries9090446

Abstract

Silicon is a desirable anode material for Li-ion batteries owing to its remarkable theoretical specific capacity of over 4000 mAh/g. Nevertheless, the poor cycling performance of pure Si electrodes caused by dramatic volume expansion has limited its practical application. To alleviate the adverse ef...

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Published in: Batteries
ISSN: 2313-0105
Published: MDPI AG 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa67801
Abstract: Silicon is a desirable anode material for Li-ion batteries owing to its remarkable theoretical specific capacity of over 4000 mAh/g. Nevertheless, the poor cycling performance of pure Si electrodes caused by dramatic volume expansion has limited its practical application. To alleviate the adverse effects of Si expansion, we have synthesized anode materials of nano-Si particles trapped in a buffering space and outer carbon-based shells (Si@Void@C). The volume ratio of Si nanoparticle to void space could be adjusted accurately to approximately 1:3, which maintained the structural integrity of the as-designed nanoarchitecture during lithiation/delithiation and achieved a notable specific capacity of ~750 mAh/g for as-prepared half-cells. The yolk-shell nanostructure alleviates volumetric expansion on both material and electrode levels, which enhances the rate performance and cycling stability of the silicon-based anode.
Keywords: lithium-ion battery; silicon-based anode; nanostructure; composited materials
College: Faculty of Science and Engineering
Funders: This research was funded by the Shenzhen Science and Technology Program (Grant No. RCBS20200714114820077) and the Young Elite Scientists Sponsorship Program by CAST (2022QNRC001).
Issue: 9
Start Page: 446

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