Surface modification of activated carbon electrodes for asymmetric hybrid capacitors using non-aqueous electrolyte
- Surface modification of activated carbon electrodes for asymmetric hybrid capacitors using non-aqueous electrolyte
- 김상옥; 이중기
- Activated carbon; Cu coating; Rate capability; Asymmetric hybrid capacitors; High rate performance
- Issue Date
- International Conference on Nano Science and Nano Technology 2010 (ICNST2010)
- The investigation of the effect of Cu coating on rate capability of activated carbon was carried out for the application of asymmetric hybrid capacitors.
Nanosized Cu particles in the range of 10~20nm are well dispersed in activated carbon matrix.
The specific surface area slightly reduced after Cu coating since Cu particles blocked the pores of activated carbon.
The modified sample has higher specific capacitance than activated carbon even though the specific surface area decreases.
Surface modification by Cu is expected to improve the high rate behavior since the introduction of Cu clusters can reduce the interfacial stability of the electrode material in non-aqueous electrolyte.
Further study of optimization of Cu coating amount is required to get the higher electrochemical performance.
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