Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Sanyo Electric Co., Ltd.

Lintec Corporation

Panasonic Holdings Corporation

Tomoki Shiozaki

Hideharu Takezawa

Kazuki Endo

Yasunari Sugita

Yuji Oura

Takahiro Takahashi

Takahito Nakayama

Hajime Nishino

Daisuke Furusawa

Kazuhiro Yoshii

Miyuki Nakai

Yuichi Kurata

Takeshi Ansai

Takafumi Tsukagoshi

Takao Sato

Kohei Saito

Satoko Motomatsu

Takeshi Ishikawa

Mineyasu Aoto

A battery includes a positive electrode, a negative electrode, a positive electrode lead which is connected to the positive electrode, and a protective tape which covers the positive electrode lead. The protective tape includes a base material layer and an adhesive layer that is arranged on the base material layer; and the adhesive layer contains an adhesive material and a filler which contains at least one compound that is selected from among phosphoric acid group-containing compounds, boric acid group-containing compounds and silicic acid group-containing compounds.

Protective tape for positive electrode lead including adhesive layer having heat resistant filler, and battery including the same

A pressure sensitive adhesive sheet for batteries, which includes a base material and a pressure sensitive adhesive layer provided on one surface side of the base material. The pressure sensitive adhesive layer contains inorganic fine particles having a water content of 0.4% or less in a single body.

Pressure sensitive adhesive sheet for batteries and lithium-ion battery

A secondary battery includes: a positive electrode having a positive-electrode current collector and a positive-electrode active-material layer; a negative electrode having a negative-electrode current collector and a negative-electrode active-material layer; a electrolyte; and an insulating tape covering a portion of the positive electrode. Furthermore, the positive-electrode current collector has an exposed section that the positive-electrode active-material layer is not disposed. In addition, at least a portion of the exposed section is covered with the insulating tape; the insulating tape has a substrate material layer and an adhesive layer; and the adhesive layer includes an adhesive agent and an insulating inorganic material.

Secondary battery including insulating tape covering positive electrode

A positive electrode () according to one embodiment is provided with: a positive electrode collector (); a first middle layer () disposed on one of two surfaces of the positive electrode collector (), the surface being on the inner circumferential side when the positive electrode collector () is wound; a second middle layer () that is disposed on the other surface that is on the outer circumferential side; and a positive electrode mixed material layer () disposed on the first middle layer () and on the second middle layer (). The first middle layer () and the second middle layer () contain insulating particles and an electrical conductor, and the thickness of the first middle layer () is less than the thickness of the second middle layer ().

Positive electrode and secondary battery

A nonaqueous electrolyte secondary battery with a positive electrode having a positive electrode current collector and a positive electrode active material layer that is supported by a first main surface and a second main surface. The first main surface includes a first exposed section on which the positive electrode active material layer is not arranged. A positive electrode lead is connected to the first exposed section and includes an extension section and an overlapping section. At least a portion of the first exposed section, along with at least a portion of the overlapping section, is covered with a positive electrode insulating tape which has a base, a first layer that adheres to the first exposed section and to the overlapping section, and a second layer interposed between the base and the first layer; and the second layer expands when heated above a threshold.

Nonaqueous electrolyte secondary battery

This positive electrode includes: a positive electrode current collector; a positive electrode mixed material layer that is formed on at least one surface of the positive electrode current collector; and a protective layer which includes an insulating inorganic compound and a conductive material, and is interposed between the positive electrode current collector and the positive electrode mixed material layer. The protective layer includes secondary particles comprising agglomerated primary particles of the inorganic compound. The median value of the particle size of the secondary particles is 30 &#x3bc;m or less.

Secondary battery positive electrode, secondary battery positive electrode current collector, and secondary battery

This secondary battery positive electrode is provided with a positive-electrode current collector, a positive-electrode mixture layer, and an intermediate layer disposed between the positive-electrode current collector and the positive-electrode mixture layer. The intermediate layer comprises: a first intermediate layer that includes a non-oxide conductive inorganic compound and a positive-electrode active material; and a second intermediate layer that includes an insulating inorganic material and a non-oxide conductive inorganic compound. The conductive inorganic compound becomes an insulating oxide at 300&#xb0; C. or above.

Secondary battery positive electrode, and secondary battery

A positive electrode for this non-aqueous electrolyte secondary battery is provided with: a positive electrode current collector; a positive electrode active material layer formed on the positive electrode current collector; a positive electrode tab connected to an exposed portion at which the positive electrode current collector is exposed and on which the positive electrode active material layer is not formed; and a protective layer covering the exposed portion and the positive electrode tab on the exposed portion. The protective layer is composed of a base material including a curable resin.

Non-aqueous electrolyte secondary battery

A positive electrode used in a secondary cell that is an example of the present embodiment is provided with a positive electrode collector, an intermediate layer formed on the positive electrode collector, and a positive electrode mixture layer formed on the intermediate layer. The positive electrode mixture layer has a thermally expandable material and a positive electrode active material. The thermally expandable material content of the positive electrode mixture layer is at least 0.1% by mass and less than 5% by mass. The intermediate layer has an insulating inorganic material and a conductive agent. The insulating inorganic material content of the intermediate layer is 80-99% by mass.

Secondary battery

A secondary battery positive electrode is provided with: a positive electrode current collector; a positive electrode mixture layer; and an intermediate layer disposed between the positive electrode current collector and the positive electrode mixture layer. The intermediate layer comprises first particles configured from an electrically conductive material, and second particles which are configured from an insulating inorganic material and have an average grain size greater than an average grain size of the first particles. The volume ratio of the first particles in the intermediate layer is not less than 25% and less than 70%. The volume ratio of the second particles in the intermediate layer is not less than 30% and less than 75%. The density of the intermediate layer is greater than 1 g/cmand not more than 2.5 g/cm.

Secondary battery positive electrode and secondary battery

A positive electrode with a positive electrode current collector and a positive electrode mixture layer, and the positive electrode mixture layer has first and second positive electrode mixture layers. The first positive electrode mixture layer comprises a positive electrode active material composed of compound A that contains Ni, Co, Al and Li. The second positive electrode mixture layer is disposed between the first positive electrode mixture layer and the positive electrode current collector, and comprises a positive electrode active material including: said compound A; and a Li-containing compound B which is smaller in specific capacity (mAh/g) and average particle diameter than said compound A. In said compound A, a ratio of Ni to the total number of moles of the metal elements except Li is 82 mol % or more. The average particle diameter of said compound B is 55% or less of the average particle diameter of said compound A.

Positive electrode for secondary battery, and secondary battery

This secondary battery positive electrode includes: a positive electrode current collector; an intermediate layer provided on the positive electrode current collector; and a positive electrode mixture layer provided on the intermediate layer and including a positive electrode active material, wherein the intermediate layer includes a conductive material, a metal phosphate, and an inorganic compound which is not a metal phosphate and has a lower oxidizing power than the positive electrode active material.

According to the present invention, a positive electrode is provided with: a positive electrode current collector which contains aluminum; a positive electrode mixture layer which contains a positive electrode active material that is configured of a lithium transition metal oxide; and an intermediate layer which is arranged between the positive electrode current collector and the positive electrode mixture layer. The intermediate layer contains inorganic compound particles, a conductive material and a binder; the circularity is from 5% to 75% (inclusive); the void fraction of the intermediate layer is from 30% to 69% (inclusive); and the average circularity of the inorganic compound particles is from 5% to 75% (inclusive).

A secondary battery includes a positive electrode having a positive electrode current collector and a positive electrode active material layer; a negative electrode having a negative electrode current collector and a negative electrode active material layer; a separator interposed between the electrodes; a electrolyte; a positive electrode lead; and an insulating tape that covers part of the positive electrode. The positive electrode current collector has an exposed portion connected to the positive electrode lead. The positive electrode lead has an extending portion that projects from the exposed portion and an overlapping portion that overlaps the exposed portion. At least part of the exposed portion and at least part of the overlapping portion are covered with the insulating tape. The insulating tape has a substrate layer and an adhesive layer. The substrate layer contains a polyimide. The adhesive layer has an electrical resistance of 1 k&#x3a9;/mmor more at 500&#xb0; C.

A positive electrode is provided with: a positive electrode current collector constituted of aluminum as the main component; a positive electrode mixture layer formed on the positive electrode current collector aid containing a lithium-containing transition metal oxide; and a protective layer interposed between the positive electrode current collector and the positive electrode mixture layer. The protective layer contains inorganic particles, a conductive agent, and a binder material. In the positive electrode, the peel strength between the positive electrode current collector and the protective layer is higher than the peel strength between the protective layer and the positive electrode mixture layer.

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Osaka, Japan

Tomoki Shiozaki