Development of novel cathode materials for sodium-ion-secondary battery based on ionic model
| Project/Area Number |
15K13513
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | University of Tsukuba |
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Principal Investigator |
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| Research Collaborator |
MORITOMO Yutaka 筑波大学, 数理物質系, 教授 (00283466)
NIWA Hideharu 筑波大学, 数理物質系, 助教 (50704566)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 層状酸化物 / ナトリウムイオン二次電池 / 圧力効果 / EXAFS解析 / 起電力 / EXAFS |
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| Outline of Final Research Achievements |
Cathode materials for sodium-ion-secondary batteries (SIBs) have been extensively studied since the discovery of the hard carbon as an anode material for SIBs. We studied pressure (P) effects on battery voltage (V) and crystal structure of layered NaMO2 (M=Cr, Fe, Co) to test the ionic model and to develop cathode materials with high value of V. We succeeded in measuring the battery voltage and crystal structure of NaMO2 (M=Cr, Fe, Co) up to 2.0 GPa. With increasing P, V monotonically increases. Using the ionic model together with crystallographic date under high P, we reproduced the increase in V. Under high P, oxygen anions in NaMO2 relatively get close to sodium cations, which strongly traps the sodium cation leading to the high V.
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Report
(3 results)
Research Products
(27 results)
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[Presentation] イオン拡散における充填効果2016
Author(s)
福住勇矢、小林 航、守友 浩
Organizer
第63回応用物理学会春季学術講演会
Place of Presentation
東京工業大学大岡山キャンパス（東京都目黒区）
Year and Date
2016-03-19
Related Report
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[Presentation] Fast Na+ diffusion in layered NaxMO2 (M=Co, Mn)2015
Author(s)
Wataru Kobayashi, Takayuki Shibata, Yutaka Moritomo
Organizer
The 9th International Conference on the Science and Technology for Advanced Ceramics (STAC-9)
Place of Presentation
Epocal Tsukuba（茨城県つくば市）
Year and Date
2015-10-19
Related Report
Int'l Joint Research
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