Li–Solid Electrolyte Interfaces/Interphases in All-Solid-State Li Batteries

Li–Solid Electrolyte Interfaces/Interphases in All-Solid-State Li Batteries

18 March 2024 | Linan Jia · Jinhui Zhu · Xi Zhang · Bangjun Guo · Yibo Du · Xiaodong Zhuang
All-solid-state lithium batteries (ASSLBs) represent a promising solution to the safety and energy density limitations of conventional lithium-ion batteries. Solid electrolytes (SEs) offer advantages such as preventing lithium dendrite growth and acting as natural barriers against short circuits. However, the interface between SEs and the anode remains a critical challenge. This review discusses strategies to overcome anode interfacial issues in four types of SEs: sulfide, oxide, polymer, and halide. Key challenges include side reactions, poor physical contact, and Li dendrite formation. Effective solutions include inserting interlayers, optimizing SE properties, and using Li alloys. The review highlights the importance of interface stability, with strategies such as in situ SEI formation, buffer interlayers, and SE optimization. Sulfide SEs, while promising, face challenges such as narrow ESW and high reactivity. Oxide SEs like LLZO and NASICONs offer good stability but require further optimization. Polymer SEs, though flexible, have low ionic conductivity. Halide SEs show high ionic conductivity and stability but face challenges in compatibility with Li anodes. The review emphasizes the need for further research to enhance interface stability, reduce Li dendrite formation, and improve overall performance of ASSLBs.All-solid-state lithium batteries (ASSLBs) represent a promising solution to the safety and energy density limitations of conventional lithium-ion batteries. Solid electrolytes (SEs) offer advantages such as preventing lithium dendrite growth and acting as natural barriers against short circuits. However, the interface between SEs and the anode remains a critical challenge. This review discusses strategies to overcome anode interfacial issues in four types of SEs: sulfide, oxide, polymer, and halide. Key challenges include side reactions, poor physical contact, and Li dendrite formation. Effective solutions include inserting interlayers, optimizing SE properties, and using Li alloys. The review highlights the importance of interface stability, with strategies such as in situ SEI formation, buffer interlayers, and SE optimization. Sulfide SEs, while promising, face challenges such as narrow ESW and high reactivity. Oxide SEs like LLZO and NASICONs offer good stability but require further optimization. Polymer SEs, though flexible, have low ionic conductivity. Halide SEs show high ionic conductivity and stability but face challenges in compatibility with Li anodes. The review emphasizes the need for further research to enhance interface stability, reduce Li dendrite formation, and improve overall performance of ASSLBs.
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