TY - JOUR
T1 - Synthesis and electrochemical properties of lithium cobalt oxides prepared by molten-salt synthesis using the eutectic mixture of LiCl-Li2CO3
AU - Han, Chi Hwan
AU - Hong, Young Sik
AU - Park, Chang Moon
AU - Kim, Keon
N1 - Funding Information:
The authors gratefully acknowledge the direct support of this work by the Korea Research Foundation (KRF 99-042-E000 75 E3107) and the LG Chemical Ltd.
PY - 2001/1
Y1 - 2001/1
N2 - Lithium cobalt oxide powders have been successfully prepared by a molten-salt synthesis (MSS) method using a eutectic mixture of LiCl and Li2CO3 salts. The physico-chemical properties of the lithium cobalt oxide powders are investigated by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), particle-size analysis and charge-discharge cycling. A lower temperature and a shorter time (approximately 700 °C and 1 h) in the Li:Co = 7 system are sufficient to prepare single-phase HT-LiCoO2 powders by the MSS method, compared with the solid-state reaction method. Charge-discharge tests show that the lithium cobalt oxide prepared at 800 °C has an initial discharge capacity as high as 140 mA h g-1, and 100 mA h g-1 after 40 cycles. The dependence of the synthetic conditions of HT-LiCoO2 on the reaction temperature, time and amount of flux with respect to starting oxides is extensively investigated.
AB - Lithium cobalt oxide powders have been successfully prepared by a molten-salt synthesis (MSS) method using a eutectic mixture of LiCl and Li2CO3 salts. The physico-chemical properties of the lithium cobalt oxide powders are investigated by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), particle-size analysis and charge-discharge cycling. A lower temperature and a shorter time (approximately 700 °C and 1 h) in the Li:Co = 7 system are sufficient to prepare single-phase HT-LiCoO2 powders by the MSS method, compared with the solid-state reaction method. Charge-discharge tests show that the lithium cobalt oxide prepared at 800 °C has an initial discharge capacity as high as 140 mA h g-1, and 100 mA h g-1 after 40 cycles. The dependence of the synthetic conditions of HT-LiCoO2 on the reaction temperature, time and amount of flux with respect to starting oxides is extensively investigated.
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U2 - 10.1016/S0378-7753(00)00505-X
DO - 10.1016/S0378-7753(00)00505-X
M3 - Article
AN - SCOPUS:0035203838
VL - 92
SP - 95
EP - 101
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
IS - 1-2
ER -