Abstract:
Provided are an electric storage device provided with a current collecting member capable of increasing the strength of connection with an electrode assembly, and a method for manufacturing the current collecting member. A current collecting member 6 includes a first portion 600 electrically connected to an external terminal 4, and a second portion 601 extending out of a second end portion of the first portion 600 and electrically connected to an electrode assembly 2. The second portion 601 includes a base portion 601a the first end portion of which is connected to the second end portion of the first portion 600, a twisted portion 601 d the first end portion of which is connected to the second end portion of the base portion 601a, and an insertion portion 601f the first end portion of which is connected to the second end portion of the twisted portion 601d and which is inserted into a winding center of the electrode assembly 2, so as to be electrically connected to the electrode assembly 2. The second portion 601 preferably further includes a reverse-twisted portion 601d' which is twisted in a direction opposite to the twisting direction of the twisted portion 601d and the first end portion of which is connected to the second end portion of the insertion portion 601f, and a leading end portion 60h the first end portion of which is connected to the second end portion of the reverse-twisted portions 601d'.
Abstract:
This conductive composition contains a conductive carbon material (A), a water-soluble resin binder (B), a water-dispersible resin particle binder (C) and an aqueous liquid medium (D), and is characterized in that, of the total 100wt% of solid content of the conductive carbon material (A), the water-soluble resin binder (B) and the water-dispersible resin particle binder (C), the content of the conductive carbon material (A) is 20-70wt%, and of the total 100 wt% of solid content of the water-soluble resin binder (B) and the water-dispersible resin particle binder (C), the content of the water-soluble resin binder (B) is greater than or equal to 3 wt% and less than 40 wt%. Hereby, it is possible to provide a conductive composition for forming a power storage device with excellent conductivity and adhesion, excellent dispersibility of the conductive carbon material and electrode adhesion, and excellent charge-discharge cycle characteristics.
Abstract:
[TECHNICAL PROBLEM] To provide a negative electrode for an electric device, such as a Li ion secondary battery, exhibiting good balanced characteristics of providing initial capacity and maintaining high cycle characteristics. [SOLUTION TO PROBLEM] The negative electrode for an electric device includes: a current collector; and an electrode layer containing a negative electrode active material, an electrically-conductive auxiliary agent and a binder and formed on a surface of the current collector. The negative electrode active material is a mixture of a carbon material and an alloy represented by the following formula (1): Si x Sn y M z A a ...(1) (in formula (1), M is at least one metal selected from the group consisting of Al, V, C, and combinations thereof, A is inevitable impurity, x, y, z, and a represent mass percent values and satisfy 0
Abstract:
A capacitor (2) has an exterior package case (12) housing an electrolyte (4) along with a capacitor element (10), a sealing plate (14) where an external terminal is disposed , the sealing plate sealing the exterior package case, and a current collecting plate (18-1, 18-2) disposed between an electrode protruding portion formed on an element end surface of the capacitor element and the external terminal, and comprises a gas releasing mechanism (a safety valve 16) disposed in the sealing plate to release a gas in the exterior package case, and a blocking mechanism (6) disposed on at least one of the sealing plate and the current collecting plate to block the electrolyte from the gas releasing mechanism. As a result, the electrolyte is blocked by the blocking mechanism and therefore does not deteriorate the releasing function of the gas releasing mechanism.
Abstract:
The present invention provides an electrode for an electric double layer capacitor comprising high energy density, low degradation of electrostatic capacitance and resistance with passage of time even using under high voltage, i.e., excellent long-term reliability. The electrode for the electric double layer capacitor comprises polarizing electrode materials containing porous carbon particles, an auxiliary conducting agent, tungsten oxide powders, and binders; conductive adhesive containing a conductive material and a poly-N-vinylacetamide (PNVA)-based binder; and a sheet current collector.
Abstract:
[TECHNICAL PROBLEM] To provide a negative electrode for an electrical device such as a Li ion secondary battery that has a high initial capacity and exhibits good balance characteristics while maintaining high cycle characteristics. [SOLUTION TO PROBLEM] A negative electrode for an electrical device includes: a current collector; and an electrode layer containing a negative electrode active material, an electrically-conductive auxiliary agent and a binder, wherein the negative electrode active material contains an alloy represented by a following formula (1): Si x Sn y M z A a (where M is M is at least one metal selected from the group consisting of Al, V, C and combinations thereof, A is inevitable impurity, and x, y, z and a are values of mass%, where 0
Abstract:
The present invention relates to current collectors, electrode structures, non-aqueous electrolyte batteries, and electrical storage devices (electrical double layer capacitors, lithium ion capacitors, and the like) that are capable to realize superior battery characteristics by suitably forming an active material layer by using an aqueous solvent. A current collector having a resin layer on at least one side of a conductive substrate, the resin layer being formed by a composition for current collector including an acryl-based resin containing acrylic acid ester and acryl amide or derivatives thereof as a main component; melamine or derivatives thereof; and carbon particles, is provided.
Abstract:
A method of manufacturing an electrode group unit for lithium ion capacitor that allows reliable welding between a current collecting member and an electrode and that provides a welded portion with a low resistance is provided. A lithium ion capacitor is also provided. An unapplied portion 25 of a positive electrode 9 and an unapplied portion 33 of a negative electrode 11 are disposed to project outside of separators 13, 15 in directions opposite to each other. The resulting assembly is wound into a swirling shape in cross section about an axial core 7 to form an electrode group 5. A lithium metal support member 17 is disposed on the negative electrode 11 such that a layer in which the lithium metal support member 17 is wound is located in a radially middle region of the electrode group 5. A negative current collecting member 45 is placed on the unapplied portion 33, and welding is performed using a direct-collecting semiconductor laser device that continuously generates laser light to manufacture an electrode group unit 2 for lithium ion capacitor. The electrode group unit 2 for lithium ion capacitor is housed in a container 3 to obtain a lithium ion capacitor 1.