Panasonic Intellectual Property Management Co., Ltd.

Sanyo Electric Co., Ltd.

Panasonic Corporation

Toray Industries, Inc.

Sanyo Electronics Co., Ltd.

Yasunori Baba

Katsunori Yanagida

Naoki Imachi

Takeshi Ogasawara

Shin Fujitani

Yoshinori Kida

Fumiharu Niina

Nobuhiro Hirano

Masanori Sugimori

Takashi Ko

Atsushi Kaiduka

Hiroshi Minami

Yuki Morikawa

Atsushi Fukui

Toshifumi Nagino

Natsumi Goto

Michihiko Irie

Akihiko Takada

Masanori Nakamura

Atsushi Nakajima

In a non-aqueous electrolyte secondary battery according to one exemplary embodiment, a separator includes a substrate, a first filler layer containing phosphate particles and formed on at least one surface of the substrate, and a second filler layer containing inorganic particles and formed on a surface of the first filler layer on the side of the at least one surface of the substrate. The phosphate particles have a BET specific surface area of 5 m/g or more and 100 m/g or less.

Non-aqueous electrolyte secondary battery

In a nonaqueous electrolyte secondary battery, a separator includes a substrate, a first filler layer containing phosphate salt particles, and a second filler layer interposed between the substrate and the first filler layer and containing inorganic particles. The separator is disposed between a positive electrode and a negative electrode in such a manner that the first filler layer and the second filler layer are directed to the positive electrode side. Further, a resin layer is disposed between the positive electrode and the first filler layer.

Nonaqueous electrolyte secondary battery including separator having substrate, phosphate salt layer, inorganic particle layer, and resin layer between separator and positive electrode

A positive electrode including a positive electrode current collector, an intermediate layer disposed on the positive electrode current collector and including a conductive agent and inorganic particles, and a positive electrode mixture layer disposed on the intermediate layer and including a positive electrode active material and a hydrogen phosphate salt represented by the general formula MaHbPO4 (wherein a satisfies 1&#x2264;a&#x2264;2, b satisfies 1&#x2264;b&#x2264;2, and M includes at least one element selected from alkali metals and alkaline earth metals), the positive electrode satisfying 0.5&#x2264;X&#x2264;3.0, 1.0&#x2264;Y&#x2264;7.0, and 0.07&#x2264;X/Y&#x2264;3.0 wherein X is the mass ratio (mass %) of the hydrogen phosphate salt relative to the total mass of the positive electrode active material and Y is the mass ratio (mass %) of the conductive agent relative to the total mass of the intermediate layer.

Positive electrode for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery

A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode and a separator disposed between the positive electrode and the negative electrode, wherein the separator includes an inorganic filler layer which includes a first filler layer containing phosphate salt particles and a second filler layer disposed on the first filler layer and containing inorganic particles more heat resistant than the phosphate salt particles, and the BET specific surface area of the phosphate salt particles is in the range of not less than 5 m/g and not more than 100 m/g.

Nonaqueous electrolyte secondary battery

A nonaqueous electrolyte secondary battery in which low-crystalline carbon-covered graphite is used as negative electrode active material, wherein a cobalt-containing lithium transitional metal oxide is used for: a first positive electrode active material in which the volume per unit mass of pores having a pore size of 100 nm or less is 8 mm/g or greater; and a second positive electrode active material in which the volume per unit mass of pores having a pore size of 100 nm or less is 5 mm/g or less.

A negative electrode for nonaqueous electrolyte secondary batteries includes a negative electrode current collector and a negative electrode mixture layer disposed on the negative electrode current collector, and the negative electrode mixture layer contains a negative electrode active material containing lithium titanate, a binder, and a (meth)acrylic acid-based polymer. The amount of the (meth)acrylic acid-based polymer in the negative electrode mixture layer is 10 mass % or less relative to the total amount of the (meth)acrylic acid-based polymer and the binder. The amount of the (meth)acrylic acid-based polymer in a portion of the negative electrode mixture layer that extends from the surface to the middle of the negative electrode mixture layer in the thickness direction (upper region) is 60 mass % or more relative to the total amount of the (meth)acrylic acid-based polymer.

Negative electrode for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery

A non-aqueous electrolyte secondary battery which uses a lithium titanium composite oxide as a negative electrode active material is configured to use a first positive electrode active material that is a Co-containing lithium transition metal oxide and has a volume per mass of 8 mm/g or more with respect to pores having a pore diameter of 100 nm or less and a second positive electrode active material that has a volume per mass of 5 mm/g or less with respect to pores having a pore diameter of 100 nm or less.

The present invention relates to a non-aqueous electrolyte secondary cell comprising: a positive electrode having a positive electrode mixture layer that contains a first positive-electrode active material and a second positive-electrode active material; a negative electrode containing a lithium-titanium composite oxide as a negative-electrode active material; and a non-aqueous electrolyte. The volume per mass of pores in the first positive-electrode active material having a pore diameter of 100 nm or less is four or more times the volume per mass of pores in the second positive-electrode active material having a pore diameter of 100 nm or less. The content of the first positive-electrode active material is 30 mass % or less with respect to the total amount of the first positive-electrode active material and the second positive-electrode active material.

A non-aqueous electrolyte battery is provided that shows good cycle performance and good storage performance under high temperature conditions and exhibits high reliability even with a battery configuration featuring high capacity. A method of manufacturing the battery is also provided. A non-aqueous electrolyte battery includes: a positive electrode having a positive electrode active material layer containing a positive electrode active material; a negative electrode having a negative electrode active material layer containing a negative electrode active material; a separator interposed between the positive electrode and the negative electrode; an electrode assembly including the positive electrode, the negative electrode, and the separator; and a non-aqueous electrolyte impregnated in the electrode assembly, characterized in that: the positive electrode active material contains at least cobalt or manganese; and a coating layer is formed on a surface of the negative electrode active material layer, the coating layer including filler particles and a binder.

Non-aqueous electrolyte battery and method of manufacturing the same

[Problem] A non-aqueous electrolyte battery is provided that shows good cycle performance and good storage performance under high temperature conditions and exhibits high reliability even with a battery configuration featuring high capacity. A method of manufacturing the battery is also provided. [Means for Solve the Problem] A non-aqueous electrolyte battery includes: a positive electrode having a positive electrode active material layer containing a positive electrode active material; a negative electrode having a negative electrode active material layer containing a negative electrode active material; a separator interposed between the positive electrode and the negative electrode; an electrode assembly including the positive electrode, the negative electrode, and the separator; and a non-aqueous electrolyte impregnated in the electrode assembly, characterized in that: the positive electrode active material contains at least cobalt or manganese; and a coating layer is formed on a surface of the negative electrode active material layer, the coating layer including filler particles and a binder.

Provided are a separator-integrated electrode and a nonaqueous electrolyte secondary battery with a reduced risk of a short circuit between electrodes due to precipitation of metallic lithium on a surface of an electrode mixture layer. A positive electrode () configured as a separator-integrated electrode includes a positive current collector (), a positive active material layer () formed on a surface thereof, a first porous layer () formed on a surface of the positive active material layer () and containing inorganic particles, and a second porous layer () formed on a surface of the first porous layer () and made of resin fibers.

Separator-integrated electrode and nonaqueous electrolyte secondary battery

To obtain a separator for a nonaqueous electrolyte battery that has an excellent nonaqueous electrolyte permeability into an electrode and an excellent electrolyte retentivity of the electrode and achieves a large capacity, a high energy density and a good high-temperature charge characteristic. A separatorused for a nonaqueous electrolyte battery is formed by disposing a porous layermade of inorganic fine particles and a resin binder on a porous separator substrate, the resin binder is made of at least one resin selected from the group consisting of polyimide resins, polyamide resins and polyamideimide resins and the molecular chain of the resin has a halogen atom content of 10% to 30% by weight, and the content of the resin binder in the porous layer is 5% by weight or more.

Separator for nonaqueous electrolyte battery and nonaqueous electrolyte battery

A non-aqueous electrolyte secondary battery is provided that remarkably improves battery reliability by quickly lowering the potential of the positive electrode while preventing separator shrinkage at high temperatures. A separator has on its surface a shrinkage-prevention-layer formed portion (), in which a layer for preventing separator shrinkage is formed, and a shrinkage-prevention-layer unformed portion (), in which the layer for preventing separator shrinkage is not formed. A positive electrode current collector and a negative electrode current collector respectively have a positive electrode current collector exposed portion () and a negative electrode current collector exposed portion (). The shrinkage-prevention-layer unformed portion () of the separator is disposed at a region where the current collector exposed portions () face each other.

A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode employs a positive electrode active material wherein oxide containing Al and/or hydroxide containing Al having a protruding-shape is uniformly distributed and adhered to the surface of a positive electrode active material particle.

Positive electrode active material for non-aqueous electrolyte secondary battery, process for preparing the same, and positive electrode for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery

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Moriguchi, Japan

Yasunori Baba