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

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

2024 | Linan Jia1 · Jinhui Zhu2 · Xi Zhang1 · Bangjun Guo1 · Yibo Du1 · Xiaodong Zhuang2
The emergence of all-solid-state lithium batteries (ASSLBs) represents a promising solution to address the safety and energy density limitations of current lithium-ion batteries. Solid electrolytes (SEs) play a crucial role in preventing lithium dendrite intrusion and acting as natural barriers against short circuits. However, significant challenges at the SE-electrode interface, particularly with the anode, hinder the practical implementation of ASSLBs. This review aims to outline the most viable strategies for overcoming these challenges across four categories of SEs: sulfide, oxide, polymer, and halide SEs. It begins by outlining pivotal issues such as anode interfacial side reactions, inadequate physical contact, and lithium dendrite formation. Effective methodologies to enhance anode interfacial stability, including solid electrolyte interface (SEI) interlayer insertion, SE optimization, and the use of lithium alloys instead of lithium metal, are then expounded. The review also presents novel insights into fostering interfaces between diverse SE types and lithium anodes, while advocating perspectives and recommendations for future advancements in ASSLBs. Key strategies revolve around interlayer insertion to separate the lithium anode and SEs, modifications to the lithium anode, and SE optimization to prevent side reactions and lithium dendrite growth while preserving SE ionic conduction.The emergence of all-solid-state lithium batteries (ASSLBs) represents a promising solution to address the safety and energy density limitations of current lithium-ion batteries. Solid electrolytes (SEs) play a crucial role in preventing lithium dendrite intrusion and acting as natural barriers against short circuits. However, significant challenges at the SE-electrode interface, particularly with the anode, hinder the practical implementation of ASSLBs. This review aims to outline the most viable strategies for overcoming these challenges across four categories of SEs: sulfide, oxide, polymer, and halide SEs. It begins by outlining pivotal issues such as anode interfacial side reactions, inadequate physical contact, and lithium dendrite formation. Effective methodologies to enhance anode interfacial stability, including solid electrolyte interface (SEI) interlayer insertion, SE optimization, and the use of lithium alloys instead of lithium metal, are then expounded. The review also presents novel insights into fostering interfaces between diverse SE types and lithium anodes, while advocating perspectives and recommendations for future advancements in ASSLBs. Key strategies revolve around interlayer insertion to separate the lithium anode and SEs, modifications to the lithium anode, and SE optimization to prevent side reactions and lithium dendrite growth while preserving SE ionic conduction.
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