Study of charge-discharge mechanism in phosphate-type cathode material with defect control
| Project/Area Number |
17K14920
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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 |
Energy engineering
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| Research Institution | Tohoku University (2018)
Tokyo University of Agriculture and Technology (2017) |
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Principal Investigator |
Kisu Kazuaki 東北大学, 材料科学高等研究所, 助教 (80755645)
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| Project Period (FY) |
2017-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | リチウムイオン二次電池 / リン酸鉄リチウム / リン酸鉄コバルトリチウム / 欠陥・結晶化度 / 結晶化度・欠陥 |
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| Outline of Final Research Achievements |
This study aims at elucidation the influence of vacancies and crystallinity on phosphate type cathode electrode to obtain the guideline for improvement the cycleability and power density of cathode material operating high voltage. The vacancies in M2 sites in phosphate type cathode material are responsible for the Li+ diffusivity enhancement within the crystals and thus for the improvements of rate capability. The findings may offer new approaches to stabilize the structure of phosphate type cathode material and other high-voltage positive electrodes for use in Li-ion batteries operating high voltage.
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| Academic Significance and Societal Importance of the Research Achievements |
電気自動車や小型モバイルなど幅広い分野における需要の高まりを背景として、蓄電デバイスの安全性、エネルギー密度、高速充放電、サイクル特性などさまざまな観点からの高性能化が要求されている。こうした高い要求の実現に向けて、現行のリチウムイオン電池の性能を凌駕する革新的な蓄電デバイスが強く望まれており、その達成に向けた新規の正極・負極電極材料や電解液などの創出が必須となっている。本研究では、電極材料における結晶内欠陥および粒子表面コーティング層が電池寿命や充放電速度に与える影響を明らかにすることで、電極材料の高性能化および新規創出に向けて指針を提案した。
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Report
(3 results)
Research Products
(20 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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[Presentation] Intercalation Host Using Defective FePO4-Carbon Composite for Magnesium Rechargeable Battery Cathode2018
Author(s)
Yuki Orikasa, Kazuaki Kisu, Etsuro Iwama, Wako Naoi, Yusuke Yamaguchi, Toshiyuki Munesada, Masashi Hattori, Kentaro Yamamoto, Patrick Rozier, Patrice Simon, Katsuhiko Naoi
Organizer
AiMES 2018
Related Report
Int'l Joint Research
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[Presentation] Magnesium Intercalation Host of Defective FePO4-Carbon Composite2018
Author(s)
Yusuke Yamaguchi, Yuki Orikasa, Kazuaki Kisu, Etsuro Iwama, Wako Naoi , Toshiyuki Munesada, Masashi Hattori, Kentaro Yamamoto, Patrick Rozier, Patrice Simon, Katsuhiko Naoi
Organizer
The 19th International Meeting on Lithium Batteries
Related Report
Int'l Joint Research
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