Year: 2009
Type: article
Abstract: We used a suite of transmission electron microscopy (TEM) and associated electron spectroscopy methods to examine the local structure and changes in the electronic structure of positive electrode material. We found a scattered rock-salt phase near grain surfaces and grain boundaries, where turned to , deduced from relative intensity ratios and fine structures of the white-line peaks of the transition metals. The spatial distribution of the degraded phase throughout the secondary particle was found using a scanning TEM-electron energy loss spectroscopy spectral imaging technique and multivariate analysis. The degradation process and its relationship to the surface reactions with electrolytes is discussed based on the spatial-distribution map of the degraded phases.
DOI: 10.1149/1.3076137
Authors: Shunsuke Muto, Yusuke Sasano, Kazuyoshi Tatsumi, Tsuyoshi Sasaki, Kayo Horibuchi, Yoji Takeuchi, Yoshio Ukyo
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2138691034