LiCoO2 powders were synthesized by the sol-gel process at various temperatures using acrylic acid as a chelating agent and their structural and electrochemical properties were systematically investigated by X-ray diffraction (XRD), extended X-ray absorption fine structure (EXAFS), Electrochemical voltage spectroscopy (EVS), cyclic voltammetry (CV), and galvanostatic charge/discharge experiments. In this study, the gel-derived LiCoO2 samples calcined at 600°C or above were found to be a well-developed layered high temperature-LiCoO2 (HT-LiCoO2) . In the EVS of all the gel-derived HT-LiCoO2 samples, the peak potential separation of 10 mV was observed regardless of the calcination temperature, indicating that these samples have basically the same thermodynamic reversibility for intercalation/deintercalation of Li ions. The change of the main peak potentials and currents in cyclic voltammograms with increasing calcination temperature could be explained by the effect of particle size.
|Number of pages||7|
|Journal||Journal of Power Sources|
|Publication status||Published - 1999 Sep|
|Event||Proceedings of the 1998 Ninth International Meeting on Lithium Batteries - Edingburgh, United Kingdom|
Duration: 1998 Jul 12 → 1998 Jul 17
Bibliographical noteFunding Information:
This study was supported by Korea Science and Engineering Foundation (No. 96-0300-17-01-3). Experiments at PLS were supported in part by MOST and POSCO.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering