Pre-lithiated hard carbon can be obtained by short-circuiting hard carbon anode and lithium sources. Then a lithium ion capacitor is fabricated with the pre-lithiated hard carbon anode and activated carbon cathode. The pre-lithiation time of anode has a great effect on the capacity of lithium ion capacitor. The capacity firstly increases and then decreases with increasing the pre-lithiation time and 15 h is the optimal pre-lithiation time. The capacitor with 15 h pre-lithiation has the maximum specific ener...
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