Uacj Corporation

Uacj Foil Corporation

The Furukawa Electric Co., Ltd.

Satoshi Yamabe

Osamu Kato

Sohei Saito

Yukiou Honkawa

Mitsuyuki Wasamoto

Tsugio Kataoka

Kenichi Kadowaki

Hidekazu Hara

Takahiro Iida

Yasumasa Morishima

Takayori Ito

Tatsuhiro Yaegashi

Mitsuya Inoue

Current collector, an electrode structure, a non-aqueous electrolyte battery, and an electrical storage device having superior shut down function are provided. According to the present invention, a current collector having a resin layer on at least one side of a conductive substrate is provided. Here, thermoplastic resin particles substantially free of a conductive agent are dispersed in a thermosetting resin base material containing the conductive agent to structure the resin layer; a value of mass ratio given by (thermoplastic resin particles)/(conductive agent) is 0.3 to 1.5; and a value given by (average thickness of conductive agent)/(average thickness of thermoplastic resin particles) is 0.3 to 4.0.

Current collector, electrode structure, nonaqueous electrolyte battery and electrical storage device, and method for producing current collector

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

Provided is a technique to confirm the performance of the conductive resin layer of a current collector without actually preparing an electrode structure, a non-aqueous electrolyte battery, an electrical double layer capacitor, a lithium ion capacitor, or an electrical storage device, and to confirm the performance of the conductive resin layer easily with high accuracy by a non-destructive test. A current collector includes a conductive substrate and a resin layer possessing conductivity, the resin layer being formed on at least one side of the conductive substrate. The resin layer possessing conductivity contains a resin and a conductive material containing carbon as a main component. When the color tone of the surface of the resin layer possessing conductivity is specified with L*a*b* color system, L* is 60 or lower, a* is &#x2212;1.0 to 1.0, and b* is &#x2212;1.0 to 3.0.

Collector and electrode structure, non-aqueous electrolyte cell, electrical double layer capacitor, lithium ion capacitor, or electrical storage device using same

A current collector, an electrode structure, a non-aqueous electrolyte battery, and an electrical storage device capable of providing superior shut down function are provided. According to the present invention, a current collector having a resin layer on at least one side of a conductive substrate, wherein: the resin layer has a thermoplastic resin dispersed in a thermosetting resin base material, the thermoplastic resin encapsuling a conductive agent; a value given by (average thickness of the conductive agent)/(average thickness of the thermoplastic resin) is 0.5 to 3; the conductive agent is formulated so that a value of volume % given by (conductive agent)/(conductive agent+thermoplastic resin) is 10 to 50%; and formulation ratio of the thermoplastic resin is 10 to 65%, is provided.

An object of the present invention is to provide a current collector which can decrease the internal resistance of a non-aqueous electrolyte battery, be used suitably for a non-aqueous electrolyte battery such as a lithium ion secondary battery and the like or for an electrical storage device such as a lithium ion capacitor and the like, and improve high rate characteristics. According to the present invention, a current collector which is structured by forming a resin layer possessing conductivity on at least one side of a conductive substrate is provided. The resin layer contains a chitosan-based resin and a conductive material, and the water contact angle of the surface of the resin layer measured by &#x3b8;/2 method in a thermostatic chamber at 23&#xb0; C. is 5 degrees or more and 60 degrees or less. In addition, an electrode structure, a non-aqueous electrolyte battery, and an electrical storage device which use the current collector are provided.

Collector, electrode structure, non-aqueous electrolyte cell, and electrical storage device

Growing community of inventors

Kusatsu, Japan

Satoshi Yamabe