[19a-P1-1~11] 1.4 Energy conversion, storage, resources and environment

[19a-P1-7] Fabrication of Si Nanopowder from Si Swarf and Application to Si Anode with High Cyclability in Li Ion Batteries

〇Taketoshi Matsumoto¹, Taichi Ohsato¹, Katsuya Kimura¹, Jaeyoung Choi¹, Hikaru Kobayashi¹ (1.ISIR, Osaka Univ.)

Keywords:silicon, Li ion battery, swarf

Si swarf is an industrial waste generated during slicing Si ingots to produce Si wafers. The wight of Si swarf is almost the same as that of Si wafers. We have applied Si swarf to an anode active material with a high capacity in Li ion batteries. In this presentation, reaction mechanisms of a Si swarf electrode and cyclability of full cells with a Si swarf anode and a LiNi_0.5Co_0.2Mn_0.3O₂ cathode are reported.