Abstract
Garnet-type solid-state electrolytes (SSEs) have been attracting much attention in the field of electrochemical energy storage technology, due to the fact that they have the advantages of high ionic conductivity, good thermal stability, excellent chemical stability with metallic lithium, and wide electrochemical window. In this review, the major problems and challenges of garnet-type SSEs are described from the aspects of ionic conductivity, chemical and electrochemical stabilities, and electrode/electrolyte interfaces in all-solid-state lithium batteries (ASSLBs). Firstly, the ionic transport mechanism, the stability mechanism, and the strategies of improving ionic conductivity and stability of the garnet-type SSE are summarized. Then, the latest electrode/electrolyte interfaces modification strategies are reported. The applications of three-dimensional (3D) structure, alloys, composite electrode, and intermediate layers to modify the interfaces of garnet-type SSEs are mainly introduced. Finally, challenges and the great perspectives of garnet-type SSEs based ASSLBs are discussed. It is hoped that this review will facilitate the future development of ASSLBs.
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