A Surfactant-based Method for Carbon Coating of LiNi0.8Co0.15Al0.05O2 Cathode in Li Ion Batteries

다국어 초록 (Multilingual Abstract)

A LiNi0.8Co0.15Al0.05O2 (LNCAO/C) active material composite cathode was coated with carbon. The conductive carbon coating was obtained by addition of surfactant during synthesis. The addition of surfactant led to the formation of an amorphous carbon coating layer on the pristine LNCAO surface. The layer of carbon coating was clearly detected by FE-TEM analysis. In electrochemical performance, although the LNCAO/C showed similar capacity at low C-rate conditions, the rate capability was improved by the form of the carbon coating at high current discharge state. After 40cycles of charge-discharge processes, the capacity retention of LNCAO/C was better than that of LNCAO. The carbon coating is effectively protected the surface structure of the pristine LNCAO during Li insertion-extraction.

참고문헌 (Reference)

1 Nagaura, T., 9 : 20-, 1990

2 Sun, Y. K., 154 : A168-, 2007

3 Chen, Z., 6 : 221-, 2003

4 Kannan, A. M., 6 : 16-, 2003

5 Liu, H., 166 (166): 317-, 2004

6 Wang, Z., 149 (149): 466-, 2002

7 Cho, J., 40 (40): 3367-, 2001

8 Cho, J., 15 : 3190-, 2003

9 Cho, J., 12 : 3089-, 2000

10 Lee, K. K., 147 (147): 1709-, 2000

11 Ryu, K. S., 38 : 1385-1390, 2008

12 Nuzzo, R. G., 105 : 4481-, 1983

13 Zou, M., 15 : 1310-, 2002

14 Pouget, J. P., 24 : 779-, 1991

15 Moon, Y. B., 30 : 196-, 1991

16 Kavan, L., 5 : A39-, 2002

17 Li, W., 67 : 123-, 1993

18 Klong, H. P., "X-ray Diffraction Procedures for Crystalline and Amorphous Materials" 1954