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Preparation and ionic conductivity of (100−x)(0.8Li2S·0.2P2S5)·xLiI glass–ceramic electrolytes

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Abstract

The glass–ceramic electrolytes of (100−x)(0.8Li2S·0.2P2S5)·xLiI (in mole percent; x = 0, 2, 5, 10, 15, 20, and 30) were prepared by mechanical milling and subsequent heat treatment. Crystalline phases analogous to the thio-LISICON region II or III in the Li2S–GeS2–P2S5 system were precipitated. The thio-LISICON III analog phase was mainly precipitated at the composition x = 0, and the thio-LISICON II analog phase was precipitated in the composition range from x = 2 to 15. The X-ray diffraction peaks of the thio-LISICON II analog phase shifted to the lower diffraction angle side with increasing the LiI content. High conductivities above 2 × 10−3 S cm−1 at room temperature were observed in the glass–ceramics at the wide composition range from x = 2 to 15. The glass–ceramic electrolyte at x = 5 with the highest conductivity of 2.7 × 10−3 S cm−1 showed a wide electrochemical window of about 10 V. The addition of LiI to the 80Li2S·20P2S5 (in mole percent) glass was effective in crystallizing the thio-LISICON II analog phase with high conductivity from the glass.

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Authors and Affiliations

  1. Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuencho, Naka-ku, Sakai, Osaka, 599-8531, Japan

    Satoshi Ujiie, Akitoshi Hayashi & Masahiro Tatsumisago

  2. Energy Use R&D Center, The Kansai Electric Power Co., Inc., 11-20-3 Nakoji, Amagasaki, Hyogo, 661-0974, Japan

    Satoshi Ujiie

Authors
  1. Satoshi Ujiie
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  2. Akitoshi Hayashi
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  3. Masahiro Tatsumisago
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Correspondence to Akitoshi Hayashi.

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Ujiie, S., Hayashi, A. & Tatsumisago, M. Preparation and ionic conductivity of (100−x)(0.8Li2S·0.2P2S5)·xLiI glass–ceramic electrolytes. J Solid State Electrochem 17, 675–680 (2013). https://doi.org/10.1007/s10008-012-1900-7

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  • DOI: https://doi.org/10.1007/s10008-012-1900-7

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