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Although lithium excess cation-disordered rock salt (DRX) metal oxides have been identified as promising candidates for positive-electrode materials, their actual potential remains unclear because previous studies have used inappropriate technological parameters, such as low mass loadings or excessive amounts of electrolyte. In this study, Li2RuO3/Li2SO4 was selected as the model DRX material, and its performance was investigated under cell-level high-energy-density conditions. A highly-mass-loaded positive electrode (30 mg cm−2) with an active material ratio exceeding 96% was fabricated by suppression of the gelation of slurry solution during the electrode preparation process, which is achieved by proper control of the particle size of Li2RuO3/Li2SO4. Notably, using a protected lithium metal electrode setup, superior capacity of the Li2RuO3/Li2SO4 electrode over 180 mA h g−1 was achieved over the 80th cycle under high mass loading and lean electrolyte conditions. The results obtained in the present study reveal the potential of the DRX based positive electrode for realizing superior performance even under practical cell conditions.

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• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

Keyword: lithium metal battery

Date published: 2024-01-03

Publisher: Royal Society of Chemistry (RSC)

Journal:

• Energy Advances (ISSN: 27531457) vol. 1 p. 248-254

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Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1039/d3ya00281k

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Updated at: 2024-06-20 08:30:26 +0900

Published on MDR: 2024-06-20 08:30:26 +0900