Researchers have created a high performance anode material for lithium-ion batteries (LIBs) using waste silicon (Si) sawdust.
To make this happen, under the project of "Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials," a joint research team from Tohoku University and Osaka University has developed a practical and mass-producible method of recycling the unwanted Si sawdust into a high-performance anode material for LIBs.
The team found that the pulverization of the Si sawdust into Si nanoflakes (~16 nm in thickness) and the subsequent carbon coating are effective in fabricating high capacity and durable LIBs. So far, a test half-cell has achieved a constant capacity of 1200 mAh/g over 800 cycles. This capacity is 3.3 times as large as that of conventional graphite (ca. 360 mAh/g).
The proposed method of material recycling is applicable for the mass production of high-performance LIB anode materials at a reasonably low cost. The research team expects that it will have great practical use in the battery industry.
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
The Institute of Scientific and Industrial Research, Osaka University
Title: Beads-Milling of Waste Si Sawdust into High-Performance Nanoflakes for Lithium-Ion Batteries
Authors: Takatoshi Kasukabe, Hirotomo Nishihara, Katsuya Kimura, Taketoshi Matsumoto, Hikaru Kobayashi, Makoto Okai, Takashi Kyotani
Journal: Scientific Reports