2016 Fiscal Year Final Research Report
Guidelines for increasing the capacity of nano-domain dispersed positive electrode materials developed by X-ray diffraction spectroscopy analyses
| Project/Area Number |
26246007
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nanomaterials engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
豊田 智史 京都大学, 工学(系)研究科(研究院), 助教 (20529656)
市坪 哲 京都大学, 工学(系)研究科(研究院), 准教授 (40324826)
水木 純一郎 関西学院大学, 理工学部, 教授 (90354977)
大石 昌嗣 京都大学, 工学(系)研究科(研究院), 講師 (30593587)
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| Co-Investigator(Renkei-kenkyūsha) |
KAWAGUCHI Tomoya 京都大学, 産官学連携本部, 助教 (00768103)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | リチウムイオン蓄電池正極材料 / 高容量系正極材料 / Ｘ線回折 / Ｘ線異常分散現象 / 放射光 |
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| Outline of Final Research Achievements |
The nano-domain dispersed material (NDD) is to provide nanopillars of a similar structure oxide to prevent the instability of the layered rock-salt structure oxide during delithiation. It was conceived that it would be possible to design positive electrode materials effective for increasing the capacity of lithium ion batteries. In this study, first we developed X-ray diffraction spectroscopy combining X-ray anomalous scattering and X-ray diffraction, which can determine the structure around a specific element in a selected phase and/or atomic sites in a unit cell, and investigated the local structures around transition metal elements in NDD. By systematically elucidating the oxidation state and local structure around the transition elements in NDD during the battery reaction, we understood the relationship between the structure of the transition metal element in NDD and the battery characteristics and proposed a NDD material design for realizing the high capacity positive electrode.
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| Free Research Field |
金属物性
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