Sulfide solid-state electrolytes (SSEs), as the most important component of all-solid-state batteries (ASSBs), have a profound impact on their performance. Among the many sulfide SSEs, Li-argyrodite SSEs have been extensively studied and are considered to be one of the most promising solid sulfide-based Li superionic conductors nowadays. However, the SSEs still have some drawbacks to be addressed, such as limited ionic conductivity at room temperature, incompatible electrode/electrolyte interface, low operating voltage window, and poor air stability. It is found that doping strategies have a non-negligible role in solving the above problems. In this review, we first introduce the crystal structures of Li-argyrodite SSEs and provide a detailed description of Li-ion transport in Li-argyrodite SSEs, followed by a detailed description of structure of the Li-sublattice. Next, the mechanism of doping strategies to enhance the ionic conductivity of Li-argyrodite SSEs is focused. Particular emphasis is provided on the ionic dynamics in doped Li-argyrodite SSEs. In addition, the effects of doping strategies (e.g., soft acid ions and metal oxides) on improving the performance (electrode/electrolyte interface and air stability) of Li-argyrodite SSEs are comprehensively presented. Finally, attractive research directions and perspectives for doped Li-argyrodite SSEs are presented, which are of great significance in guiding the energy conversion and storage of Li-argyrodite-based ASSBs.

中文翻译：

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基于掺杂策略对锂银汞矿固态电解质的新见解

硫化物固态电解质（SSE）作为全固态电池（ASSB）最重要的组成部分，对其性能有着深远的影响。在众多硫化物SSE中，锂银汞矿SSE已被广泛研究，被认为是当今最有前途的固体硫化物基锂超离子导体之一。然而，SSE仍然存在一些有待解决的缺点，例如室温下离子电导率有限、电极/电解质界面不兼容、工作电压窗口低和空气稳定性差等。研究发现，兴奋剂策略对于解决上述问题有着不可忽视的作用。在这篇综述中，我们首先介绍了锂银矿SSE的晶体结构，并详细描述了锂银矿SSE中的锂离子传输，然后详细描述了锂亚晶格的结构。接下来，重点关注增强锂银矿 SSE 离子电导率的掺杂策略的机制。特别强调掺杂锂银矿 SSE 中的离子动力学。此外，还全面介绍了掺杂策略（例如软酸离子和金属氧化物）对改善锂银矿SSE性能（电极/电解质界面和空气稳定性）的影响。最后，提出了掺杂锂银矿SSEs的有吸引力的研究方向和前景，这对于指导锂银矿基ASSB的能量转换和存储具有重要意义。