全固态锂电池被认为是解决商用锂离子电池安全性隐患的理想方案。但是，目前全固态锂电池的能量和功率密度与产业化的指标差距很大，其中亟待解决的三个关键问题是电极和固体电解质的界面阻抗过高、界面电化学失效和界面机械失效。全固态锂电池充放电过程中界面反应发生在非平衡状态下，其原位实验观测非常困难，因此造成这些问题的机制至今尚不清楚，严重阻碍了全固态锂电池性能的进一步提高。本申请拟通过采用纳米球自组装模板法制备适于原位电镜观察用的全固态纳米电池样品，建立全固态电池在充放电过程中界面演化的原位动态电镜观察和解析的新方法。通过全固态电池在循环过程中界面演化和电化学性能的同步研究，在原子尺度上阐明电极和电解质界面层的离子和电子传输机理，揭示全固态电池高界面阻抗的物理起因、电化学降解和失效的微观过程、机械失效的物理机制，为研发低界面阻抗、高能量密度、高安全性、长寿命的新型全固态锂电池提供科学依据和设计策略。

All solid state Li-ion batteries (ASSLIBs) are considered to be the ultimate solution to the safety hazard of LIBs using liquid electrolyte. However, the energy density, power density and charge/discharge electrochemical properties of current ASSLIBs are far away from that required for commercialization. There are three critical problems that need to be resolved in ASSLIBs: the high interface resistance, interfacial electrochemical degradation and failure, and the interfacial mechanical failure. The interface reaction during battery cycling usually occurs under non-equilibrium conditions, and in-situ observations of which are very difficult, consequently, the reasons for the problems in ASSLIBs are still unclear, which prevents the development of ASSLIBs with better performance. We propose to use nanosphere lithography (NSL) as templates to prepare all solid state nanobatteries that can be incorporated into an aberration corrected TEM in Yanshan University to enable in-situ TEM studies of ASSLIBs. We will create a new technology to enable real time observation and analysis of interfacial phenomena in ASSLIBs while being cycled. Through simultaneous interface evolution investigations and electrochemical property study, we intend to understand the electron and ion transport properties of interfaces between electrodes and electrolyte; reveal the physical reasons for high interface impedance in ASSLIBs; understand the mechanisms of electrochemical degradation and failure and mechanical failure. Our studies will open a new window in studying the basic sciences of ASSLIBs and provide key scientific guidance in developing novel ASSLIBs with low interface resistance, high energy and power density, long cycle life and good safety.