Infrared Sintering of Waste Silicon Powder and Copper Particles for Composite Films for Next-Generation Lithium Ion Batteries

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630030
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Production engineering/Processing studies
• Research Institution: Keio University
• Principal Investigator: YAN JIWANG 慶應義塾大学, 理工学部, 教授 (40323042)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 単結晶シリコン / 微粒子 / リチウムイオン電池 / 赤外線焼結 / 厚膜形成 / カーボンナノファイバー / 金属ナノ粒子

Outline of Final Research Achievements

We attempted high-power infrared sintering of a mixture of waste silicon powder from silicon wafer slicing processes and copper particles, as well as carbon nanofibers. Thick films with high porosity were successfully generated by strong combination of silicon and carbon nanofibers. The surface porosity, electrical conductivity and adhesion strength of the thick films and the crystallinity of the silicon were controllable by varying the scanning speed and energy density of the infrared light beam. These findings indicate the feasibility of a new fabrication method for silicon anodes for future lithium ion batteries.

Free Research Field

生産加工学