Our research focuses on high-performance sodium/lithium-ion batteries, including high energy density cathode materials and halide solid-state batteries, as well as their interface property. We have utilized X-ray Absorption Spectroscopy (XAS) to elucidate the charge balance and local structural change process of Li-rich layered cathodes and NASICON-type cathodes with the beamline of BL08UA01, BL11B, BL14W, and BL02B02 in Shanghai Synchrotron Radiation Facility (SSRF). The researches are published in Adv. Energy Mater., Chem. Mater. and Chem. Eng. J. etc. Recently, we have developed in-house in-situ X-ray Diffraction (XRD) and Pair Distribution Function (PDF) analysis to investigate the crystal structure of electrode and electrolyte in both short and long range. Combining these analytical and synchrotron radiation methods, we have great interests in explaining the electron transfer during the redox reaction process and the relationship between the dynamic, chemical, and structural evolution of the crystal structure in electrochemical processes, providing new insights into the