Negative electrode for power storage device, power storage device, and electrical device

a technology of power storage device and negative electrode, which is applied in the direction of non-aqueous electrolyte accumulator electrode, cell components, electrical apparatus, etc., can solve the problems of promoting the deterioration of the power storage device, and achieve excellent cycle characteristics, high charge and discharge efficiency, and high capacitance
US20150132649A1Inactive Publication Date: 2015-05-14SEMICON ENERGY LAB CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
SEMICON ENERGY LAB CO LTD
Publication Date
2015-05-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

A power storage device having high capacitance is provided. A power storage device with excellent cycle characteristics is provided. A power storage device with high charge and discharge efficiency is provided. A power storage device including a negative electrode with low resistance is provided. A negative electrode for the power storage device includes a current collector and an active material layer including a plurality of active material particles over the current collector. The active material particle is silicon, and the size of the silicon particle is greater than or equal to 0.001 μm and less than or equal to 7 μm.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to an object, a method, or a manufacturing method. The present invention relates to a process, a machine, manufacture, or a composition of matter. One embodiment of the present invention relates to a semiconductor device, a display device, a light-emitting device, a power storage device, a driving method thereof, or a manufacturing method thereof. One embodiment of the present invention relates to a positive electrode active material, a secondary battery, and a manufacturing method thereof. In particular, one embodiment of the present invention relates to an electrode for a power storage device and a manufacturing method thereof.

[0003] 2. Description of the Related Art

[0004] In recent years, portable electronic devices such as mobile phones, smartphones, electronic book (e-book) readers, and portable game machines have been widely used. Being used as power sources for driving these devices, p...

Claims

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