Abstract Significant safety problems and poor cyclic stability of conventional lithium-ion batteries, which based on organic liquid electrolytes, hinder their practical application, while all-solid-state batteries (ASSBs) are considered the most promising candidates to replace traditional lithium-ion batteries. As a critical component of ASSBs, solid-state electrolytes play an essential role in ion transport properties and stability. At present, the solid garnet electrolyte is considered as one of the most promising electrolytes because of its excellent performance. However, it still faces many challenges in ionic conductivity, air stability, electrode/electrolyte interface, and lithium dendrites. Therefore, this review is concerned about the up-to-date progress and challenges which will greatly influence the large-scale application of solid garnet electrolytes. Firstly, various ways to improve the ionic conductivity of solid garnet electrolytes are comprehensively summarized. Then, the stability of solid garnet electrolytes in the air is carefully discussed. Secondly, the latest progress in interface engineering between anode/cathode and solid garnet electrolytes treated by different methods is reported. The formation mechanism and influencing factors of lithium dendrites in the solid garnet electrolyte are systematically focused on. Finally, the development and innovation of composite solid garnet electrolytes and 3D garnet electrolytes are summarized in detail. Some important characterization techniques for studying the aforementioned problems are also summarized. Based on the current development of solid garnet electrolytes and solid-state batteries, further challenges and perspectives are presented.

中文翻译：

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用于全固态电池的固体石榴石电解质的关键挑战和进展

摘要 基于有机液体电解质的传统锂离子电池存在严重的安全问题和循环稳定性差等问题，阻碍了其实际应用，而全固态电池（ASSBs）被认为是替代传统锂离子电池的最有希望的候选者。 . 作为ASSB的重要组成部分，固态电解质在离子传输特性和稳定性方面起着至关重要的作用。目前，固体石榴石电解质因其优异的性能被认为是最有前途的电解质之一。然而，它在离子电导率、空气稳定性、电极/电解质界面和锂枝晶等方面仍面临许多挑战。所以，本综述关注最新进展和挑战，这将极大地影响固体石榴石电解质的大规模应用。首先，综合总结了提高固体石榴石电解质离子电导率的各种途径。然后，仔细讨论了固体石榴石电解质在空气中的稳定性。其次，报道了阳极/阴极与不同方法处理的固体石榴石电解质之间界面工程的最新进展。系统地重点研究了固体石榴石电解质中锂枝晶的形成机制及影响因素。最后，详细总结了复合固体石榴石电解质和3D石榴石电解质的发展与创新。还总结了一些用于研究上述问题的重要表征技术。基于目前固体石榴石电解质和固态电池的发展，提出了进一步的挑战和前景。