Panasonic Intellectual Property Management Co., Ltd.

Akihiko Takada

Katsunori Yanagida

Fumiharu Niina

Yuki Morikawa

Nobuhiro Hirano

Masanori Sugimori

Yasunori Baba

Kouhei Tuduki

Kouhei Tsuzuki

Kiyoshi Hashimotodani

Sho Urata

Hirokazu Wada

Yusuke Kitagawa

A negative electrode for a nonaqueous electrolyte secondary battery, said negative electrode comprising a negative-electrode current collector, and a negative-electrode active material layer provided upon the negative-electrode current collector, wherein the negative-electrode active material layer includes a negative-electrode active material and a styrene-butadiene rubber, and the glass transition temperature (Tg) of the styrene-butadiene rubber in an area that extends 10% in the thickness direction from the surface of the reverse side of the negative-electrode active material layer from the negative-electrode current collector is higher than that of the styrene-butadiene rubber in an area that extends 10% in the thickness direction from the surface of the negative-electrode current collector side of the negative-electrode active material layer.

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

A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The separator has a multilayer structure in which a first filler layer containing phosphate particles, a porous resin substrate, and a second filler layer containing inorganic particles having higher heat resistance than the phosphate particles are stacked in this order from the negative electrode side. The first filler layer is disposed on the porous resin substrate in such a manner that the surface of the first filler layer faces the surface of the negative electrode. The phosphate particles have a BET specific surface area in the range of 5 m/g or more and 100 m/g or less.

Non-aqueous electrolyte secondary battery having separator with multilayer structure

A nonaqueous electrolyte secondary battery according to an embodiment includes an electrode body, which is formed by winding a positive electrode and a negative electrode through a separator and then compressing into a flat shape, and a nonaqueous electrolyte. The positive electrode contains a lithium transition metal oxide which contains tungsten oxide adhering to the particle surfaces thereof. The negative electrode contains a negative electrode active material, which has particle surfaces coated with an amorphous carbon film, and at least one of polyacrylic acid and a salt thereof. The pressure acting in the thickness direction of the electrode body is 5&#xd7;10MPa or more.

Nonaqueous electrolyte secondary battery

In a nonaqueous electrolyte secondary battery, a positive electrode contains a lithium transition metal oxide and a phosphoric acid compound. A nonaqueous electrolyte contains a dinitrile represented by a general formula: NC-A-CN (A represents a linear hydrocarbon having 1 to 10 carbon atoms or a hydrocarbon which contains a main chain having 1 to 10 carbon atoms and at least one side chain having 3 or less carbon atoms); an ether represented by a general formula: R&#x2014;O&#x2014;R&#x2014;O&#x2014;R(Rand Reach represent a group which contains a main chain having 1 to 3 carbon atoms, and Rrepresents a chain hydrocarbon group having 1 to 3 carbon atoms); and a fluorophosphate salt.

A flow channel device includes a flow channel section and an introduction channel section. The flow channel section includes a flow channel in which a detection object flows and a wall surface surrounding the flow channel. The introduction channel section includes an introduction channel having a first end connected to the flow channel and a second end connected to an introduction port, and a wall surface surrounding the introduction channel. At least a part of the wall surface surrounding the introduction channel is a curved surface protruding toward the introduction channel.

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Hyogo, Japan

Akihiko Takada