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HOME > Waste silicon sawdust recycled into anode for lithium-ion battery

Waste silicon sawdust recycled into anode for lithium-ion battery

Waste silicon sawdust recycled into anode for lithium-ion battery

Feb. 21, 2017

Researchers have created a high performance anode material for lithium-ion batteries (LIBs) using waste silicon (Si) sawdust.

It is energy-consuming and expensive to produce Si wafers with high purity (> 99.99%). On top of that, some 50% of Si is actually discarded as industrial waste in the final cutting process. This waste is about 90 thousand tons a year worldwide, an amount large enough to meet the global demands for anode materials for LIBs.

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.

  • image caption: Production process from silicon sawdust to lithium battery anode.
    < image caption: Production process from silicon sawdust to lithium battery anode. >

Publication Details:

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

DOI: 10.1038/srep42734

Keywords : Lithium-ion batteries, Si sawdust, Recycle

大阪大学 産業科学研究所

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HOME > Waste silicon sawdust recycled into anode for lithium-ion battery

Waste silicon sawdust recycled into anode for lithium-ion battery

Waste silicon sawdust recycled into anode for lithium-ion battery

Feb. 21, 2017

Researchers have created a high performance anode material for lithium-ion batteries (LIBs) using waste silicon (Si) sawdust.

It is energy-consuming and expensive to produce Si wafers with high purity (> 99.99%). On top of that, some 50% of Si is actually discarded as industrial waste in the final cutting process. This waste is about 90 thousand tons a year worldwide, an amount large enough to meet the global demands for anode materials for LIBs.

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.

  • image caption: Production process from silicon sawdust to lithium battery anode.
    < image caption: Production process from silicon sawdust to lithium battery anode. >

Publication Details:

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

DOI: 10.1038/srep42734

Keywords : Lithium-ion batteries, Si sawdust, Recycle