Si–Ni-alloy-assisted very high-areal-capacity silicon-based anode on Ni foam for lithium ion battery

Y. Tzeng, C. Y. Jhan, K. M. Chiu, Y. C. Wu, G. Y. Chen, P. S. Wang

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)

摘要

Silicon is investigated as an active material for the anode of lithium-ion battery (LIB) because of the 10 times higher specific capacity of silicon than graphite. In order to achieve a low internal resistance and high areal capacity of a silicon-based anode, metal foams are used as three-dimensional current collectors. However, unless the foam is densely compressed, active materials adhere loosely to the foam and suffer from loss of electrical contacts with the current collector. A densely compressed anode suffers from poor physical integrity without spare room for large volume expansion of silicon. By means of pyrolysis at 800 °C in argon of a mixture of silicon nanoparticles, phenolic resin binder, and Super P conductivity agent on the nickel foam, silicon reacts with nickel to form nickel silicide while the specially selected binder is graphitized to form a conductive and porous anode with a nickel foam current collector. We report 80-nm-silicon-based anode with a nickel foam, exhibiting excellent cycling performance and a high retained areal capacity of 6.5 mAh/cm2 after 50 cycles under a discharge/charge current density of 4 mA/cm2. For anode area of 1 cm2, it stores 23.4 C of charges at a current rate of 4 mA.

原文English
文章編號101570
期刊Materials Today Chemistry
30
DOIs
出版狀態Published - 2023 6月

All Science Journal Classification (ASJC) codes

  • 催化
  • 電子、光磁材料
  • 生物材料
  • 聚合物和塑料
  • 膠體和表面化學
  • 材料化學

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