Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Sanyo Electric Co., Ltd.

Shinji Mino

Masaya Ugaji

Shuji Ito

Yasuyuki Shibano

Keiichi Takahashi

Nobuaki Nagao

Yasutaka Kogetsu

Kazuyoshi Honda

Sadayuki Okazaki

Hiroshi Yoshizawa

Kazuya Iwamoto

Hiromu Matsuda

Masaki Hasegawa

Takayuki Shirane

Satoshi Shibutani

Tsunenori Yoshida

Hiroshi Higuchi

Motoki Kinugawa

Tomoki Tsuji

Takanori Maruo

Masayoshi Hiramoto

Hitoshi Sakai

Kenichi Morigaki

Akiko Fujino

Yoriko Takai

Shin Haraguchi

Masaya Okochi

Junichi Inaba

Yoshinori Sakai

Tsuyoshi Kaito

Eisuke Sato

Kazutoshi Utsumiya

Hironori Ishii

A positive electrode slurry including a positive electrode material mixture and a dispersion medium for dispersing the positive electrode material mixture. The positive electrode material mixture contains a positive electrode active material, an electrically conductive agent, a binder, and an additive. The additive includes a compound intramolecularly having a polyether group and an acidic group.

Positive electrode slurry, positive electrode, secondary battery, and positive electrode manufacturing method

This electrode plate for a non-aqueous electrolyte secondary battery has a band-like core and a first active substance layer formed on at least a first surface of the core. A current-collecting lead is connected to an exposed section at which a portion of the first surface of the core is exposed in the longitudinal direction. The electrode plate for a non-aqueous electrolyte secondary battery has a second active substance layer which is more electroconductive than the first active substance layer and which is disposed on a portion of the first surface such that it adjoins with the exposed section.

Electrode plate for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery

A lithium secondary battery positive electrode with: a metallic foil; and a positive electrode mixture layer formed on a surface of the metallic foil and containing a binding agent, a conductive agent, and a positive electrode active material comprising a lithium-transition metal complex oxide, wherein the positive electrode has a diameter of the liquid-removed space of at most 6.5 mm as measured by a wettability evaluation test, wherein a positive electrode is placed inside a container, and a prescribed test solution is added to a prescribed liquid-surface level, and nitrogen is sprayed thereon from a prescribed pipe at a prescribed pressure. A measurement is taken of the diameter of a region from which the solution has been removed by the spraying, and a mean value of such diameters measured between 0.5 seconds and 1.5 seconds after the initiation of the spraying is used as the diameter of the liquid-removed space.

Lithium secondary battery positive electrode and lithium secondary battery

A method for producing an electrode assembly includes a step of ultrasonically welding an exposed portion where the surface of an electrode current collector is exposed and an electrode lead to each other. The ultrasonic welding is performed, while the exposed portion of the electrode current collector and the electrode lead are stacked on each other, with an ultrasonic horn pressed against a resin sheet disposed on the exposed portion or the electrode lead. The resin sheet includes a sheet base material and an adhesive layer formed on one surface of the base material and is bonded to a portion of the exposed portion that is to be in contact with the ultrasonic horn or to a portion of the electrode lead that is to be in contact with the ultrasonic horn.

Method for producing electrode assembly and method for producing nonaqueous electrolyte secondary battery

The nonaqueous electrolyte secondary battery of the present invention includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode contains a positive electrode active material composed of a lithium-containing transition metal oxide having a layered crystal structure. The negative electrode contains a negative electrode active material composed of a Ti-based oxide and an additive composed of fluorinated carbon that reacts with lithium at a more noble potential as compared to the negative electrode active material. In the nonaqueous electrolyte secondary battery of the present invention, the battery voltage reaches a discharge cut-off voltage by a potential change in the negative electrode.

Nonaqueous electrolyte secondary battery and method for manufacturing the same

A laminated battery provided with an electricity-producing element and an outer case. The electricity-producing element contains a positive electrode, a negative electrode, and an electrolyte. The outer case comprises two sheets of laminating film and includes the following: a containing section that contains the electricity-producing element; and a sealing section that is formed around the edge of the containing section by bonding the sheets of laminating film to each other. Corners are formed along the boundary between the containing section and the sealing section, and an adhesive resin layer in the sealing section is thicker in corner regions near the aforementioned corners than in other regions.

Laminated battery and manufacturing method therefor

In order to enhance charge and discharge efficiency and to improve cycle characteristics by increasing a facing area between a positive electrode active material and a negative electrode active material, in a negative electrode for lithium secondary battery having a current collector and an active material layer carried on the current collector, the active material layer includes a plurality of columnar particles. The columnar particles include an element of silicon, and are tilted toward the normal direction of the current collector. Angle &#x3b8; formed between the columnar particles and the normal direction of the current collector is preferably 10&#xb0;&#x2266;&#x3b8;&#x3c;90&#xb0;.

Lithium secondary battery

A nonaqueous electrolyte secondary battery according to the present invention includes: a negative-electrode current collector; a negative-electrode active material layerprovided on the negative-electrode current collector; a positive-electrode current collector; a positive-electrode active material layerprovided on a face of the positive-electrode current collectoropposing the negative-electrode active material layer; and at least one inorganic insulating layerprovided between the positive-electrode active material layerand the negative-electrode active material layer, the at least one inorganic insulating layerbeing composed of inorganic particles. The inorganic insulating layercontains no binder.

Nonaqueous electrolyte rechargeable battery

A battery of this invention includes: a separator which is folded in a zigzag manner, thereby forming a layered structure having at least one first-electrode holding part and at least one second-electrode holding part which are alternately aligned; a first electrode accommodated in the first-electrode holding part; and a second electrode accommodated in the second-electrode holding part. At least one of the first electrode and the second electrode has at least one protruding part. The first electrode is connected to a first terminal, and the second electrode is connected to second terminal.

Battery having a belt-like separator

A film formation method according to the present invention includes the step of forming a film of material powdersby introducing a carrier gasto a first chamberaccommodating the material powdersintermittently and mixing the material powdersand the carrier gasto generate a first aerosol, introducing the first aerosol to a second chamberto generate a second aerosol, and jetting the second aerosol to a third chamberto form a film of the material powders

Film formation method and film formation apparatus

An electrode for a lithium secondary battery including a sheet-like current collector and an active material layer carried on the current collector. The active material layer is capable of absorbing and desorbing lithium, and the active material layer includes a plurality of columnar particles having at least one bend. An angle &#x3b8;formed by a growth direction of the columnar particles from a bottom to a first bend of the columnar particles, and a direction normal to the current collector is preferably 10&#xb0; or more and less than 90&#xb0;. When &#x3b8;is an angle formed by a growth direction of the columnar particles from an n-th bend counted from a bottom of the columnar particles to an (n+1)-th bend, and the direction normal to the current collector, and n is an integer of 1 or more, &#x3b8;is preferably 0&#xb0; or more and less than 90&#xb0;.

Electrode for lithium secondary battery, lithium secondary battery and method for producing the same

A battery of the present invention has a strip-shaped electrode group. The electrode group includes a first electrode, a second electrode, and a separator interposed therebetween. The first electrode has a strip-shaped first current collector and a first active material layer carried on one surface thereof. The first active material layer faces the separator. The second electrode has a strip-shaped second current collector and a second active material layer carried on one surface thereof. The second active material layer faces the separator. The electrode group is folded in a zigzag pattern to form a laminate having a plurality of flat portions, at least one first bent portion located on a first end side of the plurality of flat portions in which the first current collector is located on the outermost side, and at least one second bent portion located on a second end side that is opposite to the first end side in which the second current collector is located on the outermost side. The laminate has a first terminal connected to the at least one first bent portion and a second terminal connected to the at least one second bent portion.

Battery including strip-shaped electrode group folded in a zigzag pattern

A solid electrolyte of the present invention is represented by a general formula: LiPMON, where M is at least one element selected from the group consisting of Si, B, Ge, Al, C, Ga and S, and a, b, c, d and e respectively satisfy a=0.62 to 4.98, b=0.01 to 0.99, c=0.01 to 0.99, d=1.070 to 3.985, e=0.01 to 0.50, and b+c=1.0. The solid electrolyte hardly deteriorates in a wet atmosphere.

Growing community of inventors

Osaka, Japan

Shinji Mino