A novel design idea of high-stability silicon anodes for lithium-ion batteries: Building in-situ “high-speed channels” while reserving space

Zhongyu He,Li Liu, Shengnan Liu,Yang Chen, Lian Sun,Chang Liu,Yanchao Zhu,Xiaofeng Wang

CHEMICAL ENGINEERING JOURNAL（2023）

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摘要

•Convenient synthesis of multi-Si-void@SiO2@lignin-based carbon composites.•Stable construction of “high speed channel” formed by Li4SiO4 and Li2O in SiO2 layer.•Reserved space in the structure effectively responds to the volume change of Si.•Synergism of voids, Si, SiO2 and lignin-based carbon realizes elxcellent properties.•High value utilization of lignin has environmental and economic benefits.

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关键词

Silicon anode,Silica,Lignin,Kirkendall effect,Multi-core-void@double shells,Lithium-ion batteries

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