Skip to main content Accessibility help
×
Home

Electrode Characteristics of Sputtered Lithium Manganese Oxide Films with Diamond-Like-Carbon Top Layer

  • Hee-Soo Moon (a1), Kwang-Sun Ji (a1), Won-Il Cho (a2), Young-Soo Yun (a2) and Jong-Wan Park (a1)...

Abstract

There have been increasing interests in lithium rechargeable batteries, especially microbatteries, with rapid development of portable electronic equipments and MEMS(Micro electromechanical systems) technology. In this work, lithium manganese oxide, as a strong candidate for the battery materials, which is more abundant, stable in ambient state and less toxic than the other oxides such as lithium nickel oxides and lithium cobalt oxides, was deposited by rf magnetron sputter. The effect of thermal treatment on the microstructure and electrode characteristics of lithium manganese oxide cathode was investigated. In electrochemical experiment using liquid electrolyte, half-cell failure would be caused by manganese dissolution, degradation of electrolyte materials during charging/discharging process and so on. In this research we focus on interface reaction problem that would affect the cyclability and lifetime of microbattery. In order to reduce the interface reaction during operation, we introduce DLC(Diamond-like-Carbon) film that has high electrical resistivity, mechanical hardness and chemical stability. DLC film was deposited on sputtered lithium manganese oxide electrode by ECRCVD(Electron Cyclotron Resonance Chemical Vapor Deposition). DLC-top-layer LiMn2O4 film was more stable during charging/discharging reaction and higher discharge capacity in wide voltage windows than LiMn2O4 film.

Copyright

References

Hide All
1. Jones, S.D. and Akridge, J.R., Solid State Ionics, 69, 357 (1994).
2. Shokoohi, F.K., Tarascon, J.M., and Wilkens, B. J., Appl. Phys. Lett., 59, 1260 (1991).
3. Hwang, K.H., Lee, S.H., and Joo, S.K., J. Electrochem. Soc., 141, 3296 (1994).
4. Kanamura, K., Toriyama, S., Shiraishi, S., Ohashi, M., and Takehara, Z., J. Electrochem. Soc., 141, 3296 (1994).
5. Xia, Y., Zhou, Y., and Yoshio, M., J. Electrochem. Soc., 144, 2593 (1997).
6. Endo, E., Yasuda, T., Kita, A., Yamaura, K., and Sekai, K., J. Electrochem. Soc., 147,1291 (2000).
7. Thackeray, M.M., Shao-Horn, Y., Kahaian, A.J., Kepler, K.D., Skinner, E., Vaughey, J.T., and Hackney, S.A., Electrochem. Solid-State Lett., 1, 7(1998)
8. Uchiyama, T., Nishizawa, M., Itoh, T., and Uchida, I., J. Electrochem. Soc., 147, 2057 (2000).

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed