Patent ID: 9324502
Filing Date: 2016-04-26
CPC Classification: H01G,Y02E

Claim Text:
1. A lithium ion capacitor, comprising: a positive electrode; a negative electrode; and an electrolyte solution, wherein: the negative electrode is doped with lithium ions; the negative electrode comprises a negative electrode current collector and electrode layers comprising a negative electrode active material and formed on front and back surfaces of the negative electrode current collector; in the negative electrode, a thickness T1 of an electrode layer formed on the front surface of the current collector is different than a thickness T2 of an electrode layer formed on the back surface of the current collector; in the negative electrode, an average thickness T0 of the thickness T1 and the thickness T2 is expressed as: in the negative electrode, a deviation D1 of the thickness T1 is expressed as: in the negative electrode, a deviation D2 of the thickness T2 is expressed as: in the negative electrode, a ratio r1 of the deviation D1 to the average thickness T0 is expressed as: in the negative electrode, a ratio r2 of the deviation D2 to the average thickness T0 is expressed as: in the negative electrode, the ratio r1 and the ratio r2 satisfy the following expressions: