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Development of high ionic-conductive Li1.5Al0.5Ge1.5(PO4)3 glass-ceramic solid electrolyte sheet at low temperature using glass/powder composite

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Abstract

Because of some drawbacks of the organic electrolytes, such as high toxicity and flammability, inorganic electrolytes have attracted attention regarding applications in all-solid-state rechargeable batteries. However, the fabrication of such electrolytes generally requires high sintering temperatures. To address this issue, in this study, ceramic sheets of Li1.5Al0.5Ge1.5(PO4)3 (LAGP)-based solid electrolyte were prepared using glass, powder, and a glass/powder composite. The use of LAGP and glass-ceramic enabled the prepared sheets to be sintered at a low temperature of 750 °C. The obtained LAGP-based solid electrolytes had the trigonal structure of sodium superionic conductor (NASICON). The LAGP glass/powder composite ceramic sheet (GPCS) exhibited fewer pores and a higher density than the glass-only and powder-only sheets. Owing to its high crystallinity and density, the LAGP_GPCS exhibited total ionic conductivity of 4.52 × 10−4 S/cm, which is exceedingly high compared with that of the other two sheets. This finding confirms that the ionic conductivity of LAGP can be increased by using simple composites. Thus, LAGP_GPCS can improve the efficiency of electric vehicles and smart grid energy storage systems, which rely on high-performance all-solid-state rechargeable batteries.

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Acknowledgements

This work was supported by the Ceramic Strategic Research Program through Korea Institute of Ceramic Engineering & Technology (KICET).

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Author notes

  1. Tae Wook Kang and Young Ji Park contributed equally to this work

Authors and Affiliations

  1. Electronic Convergence Materials Division, Optic & Electronic Component Materials Center, Korea Institute of Ceramic Engineering and Technology, Jinju, 5281, Korea

    Tae Wook Kang, Young Ji Park, Gyu Jin Jeong, Seo Young Kim, Mi Jai Lee, Jonghee Hwang, Jin-Ho Kim & Sun Woog Kim

  2. Division of Materials Science and Engineering & Convergence Technology, Gyeongsang National University, Jinju, 52828, Korea

    Gyu Jin Jeong

  3. Chemical & Biomolecular Engineering, Pusan National University, Pusan, 46241, Korea

    Seo Young Kim

  4. Advanced Resources Team, Yeongwol Industrial Promotion Agency, Yeongwol, Gangwon-do, 26240, Korea

    Byungseo Bae

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  1. Tae Wook Kang
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Kang, T.W., Park, Y.J., Jeong, G.J. et al. Development of high ionic-conductive Li1.5Al0.5Ge1.5(PO4)3 glass-ceramic solid electrolyte sheet at low temperature using glass/powder composite. J Solid State Electrochem 26, 1687–1692 (2022). https://doi.org/10.1007/s10008-022-05210-1

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  • DOI: https://doi.org/10.1007/s10008-022-05210-1

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