119th General Meeting of the KCS

Type Symposium
Area Nanoscale Structural Analysis of Energy Materials
Room No. 402호
Time FRI 10:30-:
Code MAT1-5
Subject Structural analysis of electrode materials for rechargeable batteries using synchrotron X-ray diffraction
Authors 정영화
POSTECH 포항가속기연구소, Korea
Abstract Powder X-ray diffraction (PXRD) is the most popular and powerful tool to nondestructively characterize the phase of polycrystalline materials under operational conditions. In particular, synchrotron radiation provides high energy and high photon flux, which make it possible to conduct detailed structural analysis of complex materials such as battery electrode materials. I will briefly introduce the 9B HRPD (high resolution powder diffraction) beamline of PLS(Pohang Light Source)-II, and related researches using the HRPD beamline in the first part of the presentation. The second part of this talk will be focused on structural studies of electrode materials for rechargeable Na-ion batteries among various scientific opportunities using synchrotron XRD. Research on Na-based electrode materials has been renewed because of natural abundance and low cost of Na resources. However, structural stability and phase transition behaviors of Na-electrode materials exhibit different trends as compared to the conventional Li-electrode materials. Therefore, both the crystalline structure of an electrode material and its structure changes during electrochemical cycling are considered to be critical factors to understand reaction mechanism of Na-electrode materials. Furthermore, crystal structural information plays a pivotal role to design electrode materials for high performance Na-ion batteries. In this regard, I will present the case study about phase transition behaviors of Na-layered oxides during electrochemical desodiaion/sodiation by in situ synchrotron XRD.
E-mail yhjung@postech.ac.kr