Is rice-husk-derived charcoal a promising active material on Li-ion battery anodes?

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K21330
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 1101:Environmental analyses and evaluation, environmental conservation measure and related fields
• Research Institution: Akita University
• Principal Investigator: ABE Yusuke 秋田大学, 電動化システム共同研究センター, 特任助教 (60908953)
• Project Period (FY): 2021-08-30 – 2023-03-31
• Keywords: 二次電池 / Liイオン電池 / 負極 / 活物質 / もみ殻 / 炭化物

Outline of Final Research Achievements

Rice-husk-derived carbonized products containing amorphous C and silicon oxides (SiOx) can be produced by heating a rice husk under nitrogen gas conditions. In this work, the anodic performance of the rice-husk-derived C/SiOx and its possibility of applications were investigated by demonstrating performance evaluations with the various SiOx contents and the Li doping to the anodes. The role of SiOx contents on charging-discharging performances in Li-ion batteries using rice-husk-derived C/SiOx was clarified. I found that successful application of the rice-husk-derived C/SiOx on Li-ion battery anodes, which was achieved by producing C/SiOx with 4.8-44.6 mass% SiOx and adapting Li dopant prior to the cell assembly.

Free Research Field

電力工学，環境・エネルギー，電気材料

Academic Significance and Societal Importance of the Research Achievements

携帯型電子機器，電気自動車，再生可能エネルギー発電の貯蔵設備などにおける，Liイオン電池の利用意義は高い。それら用途でLiイオン電池の需要は増加し続け，Liイオン電池および電極の生産のためには大量の電極材料が必要となる。本研究では，もみ殻から炭化物を生成し，その物性および電気化学特性を明らかにし，Liイオン電池負極活物質として応用可能であることを示した。Liイオン電池のさらなる需要が見込まれる状況において，もみ殻をその原料として提供できる可能性を示した本研究は社会的意義も大きく，さらにもみ殻炭化物のLiイオン電池負極活物質用途としての特性解明は学術的に大きく貢献した。