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Optimizing LiMn$$_{1.5}$$M$$_{0.5}$$O$$_{4}$$ cathode materials for aqueous photo-rechargeable batteries

Shimokawa, Kohei*; Matsubara, Shogo*; Kawaguchi, Tomoya*; Okamoto, Akihiro*; Ichitsubo, Tetsu

Spinel oxides can be a promising high-potential cathode material of photo-rechargeable batteries. However, LiMn$$_{1.5}$$M$$_{0.5}$$O$$_{4}$$ (M = Mn) has a difficulty in a rapid degradation during charge/discharge under the illumination of UV-visible light. In this study, various spinel-oxide materials by modifying the composition (M = Fe, Co, Ni, Zn) were investigated to demonstrate photocharging in a water-in-salt aqueous electrolyte. LiMn$$_{1.5}$$Fe$$_{0.5}$$O$$_{4}$$ showed a substantially higher discharge capacity compared to that of LiMn$$_{2}$$O$$_{4}$$ after long-term photocharging owing to enhanced stability under illumination. The result of this work provides fundamental design guidelines of spinel-oxide cathode materials to develop photo-rechargeable batteries.

Language

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English

Journal

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Chemical Communications

Volume

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59

Number

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51

Pages

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p.7947 - 7950

Publication Year/Month

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2023/06

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Held date

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Patent information

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PDF

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Paper URL

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https://doi.org/10.1039/D3CC01902K

DOI for research data

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Link to research data related to this paper/report.

Keywords

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光蓄電池

Research Facility

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Press Release

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Article of JAEA R&D Review

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Accesses

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- Accesses

InCites™

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Percentile:22.93

Category:Chemistry, Multidisciplinary

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