The interfacial behaviours of all-solid-state lithium ion batteries

All-solid-state lithium ion batteries (ASS-LB) will gradually replace traditional liquid lithium ion batteries owing to the inevitable volatility and explosion safety problems in traditional liquid lithium ion batteries. However, the development of all-solid-state batteries has been hindered because of the key role of interfacial behaviour, which can significantly influence battery properties, such as cycle life and specific energy. In this article, we reviewed the current knowledge regarding interfacial behaviour and modified methods in the ASS-LB and concluded that the contact area, pore distribution, phase structure and interfacial potential barrier directly affect interfacial ion transport performance. Therefore, we propose a novel design including microbial directed modification, freeze-drying method, and microwave technology in order to control the interface behaviours of ASS-LB. Finally, using the magnetron sputtering method, dense microcrystalline Li7La3Zr2O12 was applied between the interfaces to verify that the reduction of the energy barrier and the control of the interfacial contact can effectively enhance the interfacial ion transmission.