Enhancement of the High-Rate Capability of Solid-State Lithium Batteries by Nanoscale Interfacial Modification

Authors

  • N. Ohta,

    1. Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
    2. Present address: Polymer Electrolyte Fuel Cell Cutting-Edge Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 2-41-6 Aomi, Koto-ku, Tokyo 135-0064, Japan
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  • K. Takada,

    1. Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
    2. Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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  • L. Zhang,

    1. Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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  • R. Ma,

    1. Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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  • M. Osada,

    1. Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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  • T. Sasaki

    1. Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
    2. Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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  • We thank T. Kurihara of Powrex Corp. for his help in the preparation of the coated LiCoO2, and Y. Kobayashi and A. Yamanaka of the Central Research Institute of Electric Power Industry for their suggestions in the coating experiment. We also thank S. Takenouchi of our institute for the ICP-AES. This work was partially funded by the Ministry of Economy, Trade and Industry (METI) and New Energy and Industrial Technology Development Organization (NEDO). Supporting Information is available online from Wiley InterScience or from the author.

Abstract

original image

The high-rate capability of solid-state, rechargeable lithium batteries with sulfide electrolytes is significantly improved when the LiCoO2 particles are spray-coated with a Li4Ti5O12 film with a thickness of several nanometers (see figure). The power densities of the solid-state battery with the coated LiCoO2 are comparable to those of commercialized lithium-ion cells.

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