Garnet-type Solid-state Electrolyte Li7La3Zr2O12: Crystal Structure,Element Doping and Interface Strategies for Solid-state Lithium Batteries |
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Authors: | GUO Sijie SUN Yonggang CAO Anmin |
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Affiliation: | 1. CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences(CAS), Beijing 100190, P. R. China;2. School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P. R. China |
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Abstract: | The continuous development of solid-state electrolytes(SSEs) has stimulated immense progress in the development of all-solid-state batteries(ASSBs). Particularly, garnet-typed SSEs in formula of Li7La3Zr2O12(LLZO) are under intensive investigation to exploit their advantage in high lithium ions conductivity(>1 mS/cm), wide electrochemical window(>5 V), and good chemical electrochemical stability for lithium, which are critical factors to ensure a stable, and high performance ASSBs. This review will focus on the challenges related to LLZOs-based electrolyte, and update the recent developments in structural design of LLZOs, which are discussed in three major sections:(i) crystal structure and the lithium-ion transport mechanism of LLZO; (ii) single-site and multi-site doping of Li sites, La sites and Zr sites to enhance Li ions conductivity(LIC) and stability of LLZO; (iii) interface strategies between electrodes and LLZO to decrease interface area-specific resistance(ASR). |
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Keywords: | Solid-state electrolyte Garnet Li ions conductivity Doping Surface coating |
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