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Negative electrode active material for electrical device, negative electrode for electrical device, and electrical device

A technology for negative active materials and electrical equipment, applied in the direction of active material electrodes, non-aqueous electrolyte batteries, negative electrodes, etc., which can solve the problems of large volume changes and reduced cycle life of electrodes

Active Publication Date: 2014-08-27
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, in the lithium ion secondary battery using the electrode material described in Patent Document 1, there is a problem that when silicon (Si) and lithium (Li) are alloyed, an amorphous state is transformed into a crystalline state, causing Large volume change, thus reducing the cycle life of the electrode

Method used

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  • Negative electrode active material for electrical device, negative electrode for electrical device, and electrical device
  • Negative electrode active material for electrical device, negative electrode for electrical device, and electrical device
  • Negative electrode active material for electrical device, negative electrode for electrical device, and electrical device

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Embodiment

[0090] Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited by these examples.

[0091] [1] Preparation of negative electrode

[0092] As the sputtering device, an independently controlled ternary DC magnetron sputtering device (manufactured by Daiwa Ki Kogyo Co., Ltd., combined type sputtering coating device, gun-sample distance: about 100 mm) was used. Using this apparatus, thin films of negative electrode active material alloys having various compositions were formed on a substrate (current collector) made of nickel foil with a thickness of 20 μm according to the following targets and film formation conditions. As a result, 34 kinds of negative electrode samples having thin films of negative electrode active material alloys having the compositions shown in Tables 1 and 2 were obtained.

[0093] (1) Target (manufactured by High Purity Chemical Laboratory Co., Ltd., purity: 4N)

[0094] S...

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Abstract

This negative electrode active material for an electrical device comprises an alloy that contains at least 29% by mass of silicon, with the remainder being tin, carbon, and unavoidable impurities.

Description

technical field [0001] The present invention relates to a negative electrode active material for electrical equipment represented by secondary batteries and capacitors used as power sources for driving engines of electric vehicles (EV) and hybrid electric vehicles (HEV). Background technique [0002] In recent years, as a countermeasure against air pollution and the global warming effect, reducing carbon dioxide (CO 2 ) emissions as the target to take various measures. In addition, in the automotive industry, the introduction of hybrid electric vehicles and electric vehicles is expected to reduce CO 2 emissions. Therefore, the development of high-performance secondary batteries is increasingly active as a power source for driving the engines of these vehicles. [0003] The above-mentioned secondary battery for driving an engine is particularly required to have a high capacity and excellent cycle characteristics. Therefore, from such a viewpoint, among various secondary b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38C01B31/30C23C14/14
CPCH01M2220/20H01M4/387H01M4/0426C23C14/14H01M10/0525C22C32/0084H01M10/052C01B33/06Y02T10/7011C22C30/04C23C14/3464H01M2004/027C23C14/06H01M4/386C22C13/00C01B31/30C22C1/0483Y02E60/10C01B32/90H01M4/134H01M4/38H01M4/44
Inventor 渡边学田中修吉田雅夫
Owner NISSAN MOTOR CO LTD
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