Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 517-523 |
| Number of pages | 7 |
| Journal | Journal of Power Sources |
| Volume | 81-82 |
| DOIs | |
| 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 note
Funding 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
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