Abstract
AbstractAll solid‐state lithium metal batteries (ASSLMBs) provide a promising solution for next‐generation rechargeable energy storage due to their high energy density and the high safety of solid‐state electrolytes (SSEs). However, most SSEs lack thermodynamic intrinsic stability against Li metal and chemical reactions happen spontaneously at the interface when solid‐state electrolytes are in contact with Li metal. An imperfect anode–electrolyte interface is a major hidden danger which restricts electrochemical performances and practical applications of full cells. This review comprehensively analyzes main challenges for anode–electrolyte interfaces in ASSLMBs including poor chemical or electrochemical compatibility, poor ion transport at the interface, and mechanical instability. Exiting strategies focusing on interface engineering are summarized and merits and nonmerits of each method are discussed objectively. The principles and outlooks of interface design are proposed. Meanwhile, advanced characterization and mass production technology are also brought forward to drive the in‐depth study and development of ASSLMBs.
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