Light-induced Li extraction from LiMn2O4/TiO2 in a water-in-salt electrolyte for photo-rechargeable batteries

Kohei Shimokawa; Shogo Matsubara; Akihiro Okamoto; Tetsu Ichitsubo

doi:10.1039/D2CC03362C

Light-induced Li extraction from LiMn₂O₄/TiO₂ in a water-in-salt electrolyte for photo-rechargeable batteries†

Kohei Shimokawa,

*^ab Shogo Matsubara,

^c Akihiro Okamoto

^de and Tetsu Ichitsubo

*^bf

Author affiliations

* Corresponding authors

^a Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, 6-3 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8578, Japan
E-mail: kohei.shimokawa.b7@tohoku.ac.jp

^b Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
E-mail: tichi@imr.tohoku.ac.jp

^c Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Show-ku, Nagoya 466-8555, Japan

^d International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

^e Graduate School of Chemical Sciences and Engineering, Hokkaido University, North 13 West 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan

^f Advanced Science Research Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan

Abstract

Photocharging of high-potential spinel LiMn₂O₄ is demonstrated by using a water-in-salt electrolyte and TiO₂ nanoparticles. In a developed half-cell system with an electron acceptor, Li extraction from LiMn₂O₄ proceeds under the illumination of UV-visible light at an estimated rate of ∼23 mA g⁻¹. This work paves the way for high-potential cathode materials in photo-rechargeable batteries.

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DOI: https://doi.org/10.1039/D2CC03362C
Article type: Communication
Submitted: 15 Jun 2022
Accepted: 28 Jul 2022
First published: 08 Aug 2022

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Chem. Commun., 2022,58, 9634-9637

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Light-induced Li extraction from LiMn₂O₄/TiO₂ in a water-in-salt electrolyte for photo-rechargeable batteries

K. Shimokawa, S. Matsubara, A. Okamoto and T. Ichitsubo, Chem. Commun., 2022, 58, 9634 DOI: 10.1039/D2CC03362C

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Chemical Communications

Light-induced Li extraction from LiMn₂O₄/TiO₂ in a water-in-salt electrolyte for photo-rechargeable batteries†

Abstract

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Light-induced Li extraction from LiMn₂O₄/TiO₂ in a water-in-salt electrolyte for photo-rechargeable batteries

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