Conversion Anode Materials with High Capacity and Long Cycle Life
| Project/Area Number |
16K17970
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Device related chemistry
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
Iwama Etsuro 東京農工大学, 工学(系)研究科(研究院), 准教授 (90726423)
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| Project Period (FY) |
2016-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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| Keywords | リチウムイオン電池負極 / 長寿命 / リチウム-酸素交換反応 / 金属-酸素結合制御 / 金属ー酸素結合の制御 / リチウムイオン電池 / メカニカル処理による直接合成 / 可逆反応メカニズム解析 / 高容量 / 金属酸化物 / リチウム |
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| Outline of Final Research Achievements |
This study was mainly focused on an elucidation of reaction mechanism for conversion-type anode materials which enables anomalous long cycles. Using SnO2 and Mn3O4 as model materials, the complete encapsulation of 5-10 nm metal oxides nanoparticles is the essential factor to attain the reversible conversion reaction. in situ EXAFS analysis confirmed that disappearance and reappearance of Sn-O or Mn-O bonding during charge-discharge process occurred reversibly. Furthermore, Li3VO4 and its reaction mechanism were studied as an another model material which enables long cycle life without any encapsulation.
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| Academic Significance and Societal Importance of the Research Achievements |
従来は可逆化が困難であった遷移金属酸化物のコンバージョン反応(リチウム-酸素交換型反応)の長期充放電サイクルを達成したこと、これを達成するために重要な要素を明らかとしたことで、電池の高容量化への寄与、ひいては低CO2環境社会の構築への貢献が期待される。
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Report
(5 results)
Research Products
(39 results)
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[Journal Article] Cation-Disordered Li3VO4: Reversible Li Insertion/Deinsertion Mechanism for Quasi Li-Rich Layered Li1+x[V1/2Li1/2]O2 (x = 0-1)2018
Author(s)
Patrick Rozier, Etsuro Iwama, Nagare Nishio, Kazuhisa Baba, Keisuke Matsumura, Kazuaki Kisu, Junichi Miyamoto, Wako Naoi, Yuki Orikasa, Patrice Simon, Katsuhiko Naoi
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Journal Title
Chemistry of Materials
Volume: 30
Issue: 15
Pages: 4926-4934
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Ultrafast Nanocrystalline-TiO 2 (B)/Carbon Nanotube Hyperdispersion Prepared via Combined Ultracentrifugation and Hydrothermal Treatments for Hybrid Supercapacitors2016
Author(s)
Katsuhiko Naoi, Takayuki Kurita, Masayuki Abe, Takumi Furuhashi, Yuta Abe, Keita Okazaki, Junichi Miyamoto, Etsuro Iwama, Shintaro Aoyagi, Wako Naoi, Patrice Simon
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Journal Title
Advanced Materials
Volume: 28
Issue: 31
Pages: 6751-6457
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Presentation] High Power Lithium Vanadate/Carbon Composites For the Hybrid Supercapacitors Application2016
Author(s)
Etsuro Iwama, Nozomi Kawabata, Nagare Nishio, Kazuhisa Baba, Kazuaki Kisu, Junichi Miyamoto, Wako Naoi, Patrick Rozier, Patrice Simon, and Katsuhiko Naoi
Organizer
PRIME2016/ECS230th Meeting
Place of Presentation
Hawaii convention center (USA, Honolulu)
Year and Date
2016-10-02
Related Report
Int'l Joint Research
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