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- Title
Preparation of Si-Based Composite Anode for Li-Ion Batteries by Cold Spraying and Its Electrochemical Performance.
- Authors
Song, Jun; Li, Huijie; Chu, Xiaowan; Jiang, Mingjie; Wan, Chi; Zhang, Qi; Chen, Yuhui; Zhang, Jun; Wu, Xuehong; Liu, Juanfang
- Abstract
Silicon-based materials have become one of the most likely materials to replace graphite anodes of Li-ion batteries due to their ultra-high theoretical specific capacity, safe lithium intercalation potential, and abundant reserves. However, the large volume effect of silicon-based materials during cycling has become a serious obstacle to their commercial application. Silicon-metal composite is one of the potential solutions to alleviate the volume effect of silicon-based anode. Traditional electrodes are prepared by slurry coating method, and the electrodes crack and fall off after many cycles, resulting in capacity loss. In this paper, a cold spraying method combined with ball milling was proposed to prepare silicon-copper composite electrodes to improve the bonding between electrode materials and the cycling stability of the electrodes. Composite powders with different component ratios were first prepared. Then, the micromorphology, bond strength, thermal conductivity, and electrochemical performance of the electrodes prepared by the slurry coating method and the cold spray method were analyzed, respectively. The results show that the Cu100-xSix cold sprayed electrodes have higher bond strength and porosity, while the higher porosity of the cold-sprayed electrodes does not promote heat transfer. After the addition of conductive carbon black, the electrodes exhibit better structural stability, cycling performance, capacity retention, and reaction kinetics, with the Cu80Si20 + SP cold prayed electrode exhibiting 600 mAh g−1 after 200 cycles. This work not only successfully prepared a silicon-copper composite anode with excellent performance but also provided a reference for the preparation of other composite electrodes by cold spray combined with ball milling.
- Subjects
LITHIUM-ion batteries; METAL spraying; ELECTRODE performance; ELECTROCHEMICAL electrodes; ANODES; CARBON-black
- Publication
Journal of Thermal Spray Technology, 2023, Vol 32, Issue 5, p1203
- ISSN
1059-9630
- Publication type
Article
- DOI
10.1007/s11666-023-01567-5