Synthesis, electrochemistry, and thermal stability of high-energy ball-milled silicon-based alloy anodes in lithium-ion batteries

Xingyu, Z., Wang, L., Zhang, T. and Lam, K.-h. (2023) Synthesis, electrochemistry, and thermal stability of high-energy ball-milled silicon-based alloy anodes in lithium-ion batteries. Batteries and Supercaps, 6(5), e202200495. (doi: 10.1002/batt.202200495)

Abstract

The fast capacity degradation of silicon-based anodes significantly limits the application in lithium-ion battery (LIB) industries. Recently, Si−CuO composites have been reported as promising anodes in terms of being cost-effective and technically feasible, but improved cycle stability is still desired. This work introduces a proper amount of NiO into the Si−CuO composites via a facile high-energy ball-milling method. The study reveals that compared to the binary Si-CuO composites, Si−CuO−NiO samples have less pronounced volume change during the cycles due to the formation of rich-Si NiSi2. More specifically, Si87.5(CuO)3.4(NiO)9.1 shows the highest 100-cycle capacity retention of ∼86.9 % at 0.2 C with an average coulombic efficiency of ∼99.4 %. Moreover, the thermal stability investigation demonstrates that the temperature of 600 °C is suitable to coat a carbon layer on Si87.5(CuO)3.4(NiO)9.1, where the microstructure and the uniform element distribution produced in the milling process as well as the suppression to the cr-Li3.75Si formation can be maintained to the maximum extent, thus with further enhanced electrochemical performance.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Lam, Dr Koko
• Authors: Xingyu, Z., Wang, L., Zhang, T., and Lam, K.-h.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Batteries and Supercaps
• Publisher: Wiley
• ISSN: 2566-6223
• ISSN (Online): 2566-6223
• Published Online: 23 January 2023
• Copyright Holders: Copyright © 2023 The Authors
• First Published: First published in Batteries and Supercaps 6(5): e202200495
• Publisher Policy: Reproduced under a Creative Commons License