Recent progress on the Li7La3Zr2O12 （LLZO） solid electrolyte

doi:10.19799/j.cnki.2095-4239.2019.0286

Abstract

Abstract:

Solid-state batteries with high safety, high energy density, and long lifespan are considered one of the most important next-generation energy storage technologies to replace traditional organic rechargeable Li-ion batteries. The development of such solid batteries is limited by the solid electrolytes that are compatible with solid-solid interfaces. Since it’s discovered in 2007, the garnet Li₇La₃Zr₂O₁₂ （LLZO） solid electrolyte has demonstrated a promising application in solid batteries owing to its superior ionic conductivity （ca. 10^-3 S/cm at room temperature） and highly stable chemical/electrochemical activities. Therefore, this review systematically summarizes the recent progress on the structural manipulation, elemental doping, and the fundamentals of fast ionic migration. In addition, this paper introduces an approach to optimize the interface structure between the positive/negative electrodes and the garnet-type solid electrolyte, improve the interface wettability and compatibility with LLZO electrodes, and presents the history of Li-rich garnet solid electrolytes. The new results on the development of high-performance LLZO-based solid batteries are also included to outline the path for building better solid batteries. This paper sheds new light on promoting the practical application of all-solid-state lithium-ion batteries.

Key words: Li-rich Garnet, Li₇La₃Zr₂O₁₂ （LLZO）, ionic conductivity, ionic transport, solid state batteries

CLC Number:

TM 912

JIANG Pengfeng, SHI Yuansheng, LI Kangwan, HAN Baichuan, YAN Liquan, SUN Yang, LU Xia. Recent progress on the Li₇La₃Zr₂O₁₂ （LLZO） solid electrolyte[J]. Energy Storage Science and Technology, 2020, 9(2): 523-537.

Figures/Tables 4

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Recent progress on the Li₇La₃Zr₂O₁₂ （LLZO） solid electrolyte

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