High-Performance Silicon-Rich Microparticle Anodes for Lithium-Ion Batteries Enabled by Internal Stress Mitigation

Nano-Micro Letters

Article

Biao Zhang¹  Xiaoqiong Du¹  Rui Zhou¹  Yao Gao²  Zengbao Jiao³  Lei Fan³ 

[1] Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, People’s Republic of China;Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, People’s Republic of China;Department of Physics, The Chinese University of Hong Kong, New Territories, Hong Kong, People’s Republic of China;Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, People’s Republic of China;

关键词: Silicon anodes;    Silicon microparticles;    Lithium-ion batteries;    Internal stress;   

DOI  :  10.1007/s40820-023-01190-7

 received in 2023-05-30, accepted in 2023-08-17,  发布年份 2023

来源: Springer

【 摘 要 】

tsThe Sn and Sb incorporation boosts the electronic conductivity and lithium diffusivity of Si anodes, thereby reducing the stress due to lithium concentration gradient.The lithiation of modified electrode mimics isotropic solid solution reaction, rather than the original anisotropic two-phase reaction of Si, effectively weakening the stress concentration.The silicon-rich particles exhibit a capacity of over 1.9 Ah g−1 after 100 cycles at 0.1 A g−1 and maintain the excellent cyclic stability at 3 A g−1.

【 授权许可】

CC BY   
© Shanghai Jiao Tong University 2023

【 图 表 】

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