The development of lithium-ion solid electrolyte provides new ideas for solving the safety problems of secondary lithium-ion batteries(LIB) and, at the same time, the improvement of energy density. However, the conseq...The development of lithium-ion solid electrolyte provides new ideas for solving the safety problems of secondary lithium-ion batteries(LIB) and, at the same time, the improvement of energy density. However, the consequent solid-solid interfacial problems have become a typical bottleneck to the performance. It has been considered that the space charge layer(SCL) formed at the interface to balance the sharp electrochemical inherent difference of properties is one of the most important factors that affect the ion transportation along and across the interface. Its existence may hinder ion transportation and increase the interfacial impedance but may also help to provide a new percolation path for lithium ion and so to enhance the ion migration. However the mechanism of SPL formation and its regulation on ion transport is not very clear, so it has raised a lot of attention and interest from LIB researchers. The purpose of this article is to try to gain some knowledge of SCL and, at the same time to browse through the related research in recent years. Hopefully, it may help those interested in solid electrolyte development for all-solidstate lithium-ion batteries(ASSB) in the future.展开更多
基金supported by the Special Guiding Program for Technology Innovation of Shaanxi Province (Grant No. 2022GF05-02)the National Natural Science Foundation of China (Grant No. 21971117)+7 种基金the Nankai University Central University Function Research Fund (Grant No.63186005)the Tianjin Rare Earth Key Laboratory of Materials and Application (Grant No. ZB19500202)the Open Fund of State Key Laboratory of Rare Earth Resources Utilization (Grant No. RERU2019001)the Project111 (Grant No. B18030)the Collaborative Innovation Project of BeijingTianjin-Hebei (Grant No. 19YFSLQY00030)the National Key R&D Program of China (Grant No. 2021YFA1202400)the Outstanding Youth of Tianjin Natural Science(Grant No. 20JCJQJC00130)the Key Project of Tianjin Natural Science Foundation (Grant No.20JCZDJC00650)
文摘The development of lithium-ion solid electrolyte provides new ideas for solving the safety problems of secondary lithium-ion batteries(LIB) and, at the same time, the improvement of energy density. However, the consequent solid-solid interfacial problems have become a typical bottleneck to the performance. It has been considered that the space charge layer(SCL) formed at the interface to balance the sharp electrochemical inherent difference of properties is one of the most important factors that affect the ion transportation along and across the interface. Its existence may hinder ion transportation and increase the interfacial impedance but may also help to provide a new percolation path for lithium ion and so to enhance the ion migration. However the mechanism of SPL formation and its regulation on ion transport is not very clear, so it has raised a lot of attention and interest from LIB researchers. The purpose of this article is to try to gain some knowledge of SCL and, at the same time to browse through the related research in recent years. Hopefully, it may help those interested in solid electrolyte development for all-solidstate lithium-ion batteries(ASSB) in the future.
