The Furukawa Electric Co., Ltd.

Uacj Corporation

Uacj Foil Corporation

Mitsuya Inoue

Hidekazu Hara

Takahiro Iida

Yasumasa Morishima

Osamu Kato

Sohei Saito

Yukiou Honkawa

Satoshi Yamabe

Tsugio Kataoka

Takayori Ito

Tatsuhiro Yaegashi

Provided are a current collector which has an excellent high-rate property and exerts a sufficient safety function when employed in a secondary battery or a capacitor, as well as an electrode, a secondary battery or a capacitor in which said current collector is employed. According to the invention, a current collector is provided which comprises: metal foil; and a conductive layer with a film thickness of 0.1 &#x3bc;m to 10 &#x3bc;m formed on a surface of said metal foil. Here, said conductive layer includes a conductive material and a binder material. A melting point of said binder material is 80&#xb0; C. to 150&#xb0; C. Further, said binder material shows, in differential scanning calorimetry (DSC) in a range from room temperature to 200&#xb0; C., one or more endothermic peaks in the heating-up process. In a case where said binder material shows two or more endothermic peaks, each difference between said peaks is 15&#xb0; C. or more. Moreover, said binder material shows one or more exothermic peaks in the cooling-down process. In a case where said binder material shows only one exothermic peak, said exothermic peak falls within a range of 50 to 120&#xb0; C., and a width at half maximum of said exothermic peak is 10&#xb0; C. or less. On the other hand, in a case where said binder material shows two or more exothermic peaks, a maximum exothermic peak among said exothermic peaks falls within a range of 50 to 120&#xb0; C., and a width at half maximum of said exothermic peak is 10&#xb0; C. or less.

Current collector, electrode, secondary battery and capacitor

Growing community of inventors

Kusatsu, Japan

Mitsuya Inoue