Hard X-ray Photoelectron Spectroscopy Analysis of Surface Chemistry of Spray Pyrolyzed LiNi<sub>0.5</sub>Co<sub>0.2</sub>Mn<sub>0.3</sub>O<sub>2</sub> Positive Electrode Coated with Lithium Boron Oxide
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- HASHIGAMI Satoshi
- R&D Center, The Kansai Electric Power Co., Inc. Department of Molecular Chemistry and Biochemistry, Doshisha University
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- YOSHIMI Kei
- Department of Molecular Chemistry and Biochemistry, Doshisha University
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- KATO Yukihiro
- Department of Molecular Chemistry and Biochemistry, Doshisha University
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- YOSHIDA Hiroyuki
- R&D Center, The Kansai Electric Power Co., Inc.
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- INAGAKI Toru
- R&D Center, The Kansai Electric Power Co., Inc.
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- TATEMATSU Masamoto
- R&D Center, The Kansai Electric Power Co., Inc.
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- DEGUCHI Hiroshi
- R&D Center, The Kansai Electric Power Co., Inc.
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- HASHINOKUCHI Michihiro
- Department of Molecular Chemistry and Biochemistry, Doshisha University
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- DOI Takayuki
- Department of Molecular Chemistry and Biochemistry, Doshisha University
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- INABA Minoru
- Department of Molecular Chemistry and Biochemistry, Doshisha University
抄録
<p>It is known that the deterioration of LiNi0.5Co0.2Mn0.3O2 is suppressed by inhibiting direct contact between the cathodes and the electrolyte by surface coating. In order to evaluate the influence of the electrode/electrolyte interface degradation, it is necessary to eliminate the influence of particle cracking. In this study, LiNi0.5Co0.2Mn0.3O2 particles with a small size (500 nm to 1 µm) without crack formation after charge-discharge cycling were synthesized by a spray pyrolysis method. Hard X-ray photoelectron spectroscopy was used to investigate the structural changes of the cathode. It was revealed that the cathode coated with lithium boron oxide (LBO) by an antisolvent precipitation method had high durability against the surface structure changes by the reduction of transition metal ions. The formation and dissolution of NiO occurred in the uncoated sample during cycling, but the formation of NiO was suppressed in the LBO-coated sample. It was considered that the structural changes of the active material surface during cycling led to an increase in surface resistance of the uncoated sample, which is the main reason for the capacity fading of the spray pyrolyzed LiNi0.5Co0.2Mn0.3O2 cathode particles.</p>
収録刊行物
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- Electrochemistry
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Electrochemistry 87 (6), 357-364, 2019-11-05
公益社団法人 電気化学会
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詳細情報 詳細情報について
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- CRID
- 1390564227335034368
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- NII論文ID
- 130007741822
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- ISSN
- 21862451
- 13443542
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- 本文言語コード
- en
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- データソース種別
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- JaLC
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- 使用可