| 摘要 |
PURPOSE: Cathode active materials for a lithium ion capacitor are provided to maximize the charging and discharging capacity of the lithium ion capacitor by electrochemically doping carbon cathode active materials with lithium. CONSTITUTION: An average outer diameter of a carbon nano tube is 500 um or less. A carbon nano tube composite has lithium metal oxide of 0.1 to 80 weights based on the carbon nano tube of 100 weights. The initial charging and discharging efficiency of the lithium metal oxide is 50 % or less. The average particle size of the lithium metal oxide is 10 um or less. The cathode has the cathode active materials. The anode has the anode active materials. A separator is formed between the cathode and the anode. [Reference numerals] (AA) Separator; (BB) Anode; (CC) Cathode; (DD) Current collector
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