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Nonaqueous electrolyte secondary battery and process for producing negative electrode thereof

Inactive Publication Date: 2010-08-04
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, when a binder is used, the binder remains on the surface of the negative electrode, which causes an increase in internal resistance

Method used

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  • Nonaqueous electrolyte secondary battery and process for producing negative electrode thereof
  • Nonaqueous electrolyte secondary battery and process for producing negative electrode thereof
  • Nonaqueous electrolyte secondary battery and process for producing negative electrode thereof

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Embodiment Construction

[0019] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the present invention is not limited to the following contents as long as it is based on the basic features described in this specification.

[0020] figure 1 It is a partially cutaway perspective view of the non-aqueous electrolyte secondary battery according to Embodiment 1 of the present invention. figure 2 It is an exploded perspective view of the said nonaqueous electrolyte secondary battery. in addition, Figure 3A It is a schematic cross-sectional view showing an example of the negative electrode of the above-mentioned non-aqueous electrolyte secondary battery. Figure 4 This is a schematic configuration diagram of an apparatus for producing the precursor of the negative electrode.

[0021] exist figure 1 , figure 2 Among them, the prismatic battery includes: a negative electrode 1, a positive electrode 2 facing the negative electr...

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Abstract

A process for producing a negative electrode, comprising the first step of forming multiple columnar active substance agglomerates capable of electrochemical occlusion / release of lithium ions on a surface of current collector and the second step of incorporating granular lithium in interstices of the active substance agglomerates.

Description

technical field [0001] The present invention relates to a non-aqueous electrolyte secondary battery, and more specifically, to an improvement in the capacity of a non-aqueous electrolyte secondary battery using an active material having a high capacity density such as silicon (Si) or a Si compound as a negative electrode. Background technique [0002] Non-aqueous electrolyte secondary batteries typified by lithium ion secondary batteries are attracting attention as high-capacity power sources in devices such as portable devices. In recent years, in order to further increase the capacity of such batteries, development of electrode materials (effective application of high-capacity-density active materials and weight reduction of auxiliary materials) and improvement of structural parts (thinning, etc.) have been actively carried out. [0003] Among them, Si and Si compounds, which are negative electrode active materials, are high-capacity-density materials having a theoretical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/02H01M4/48H01M4/62H01M4/139H01M4/1395H01M10/052
CPCH01M4/1395Y02E60/122H01M4/382H01M10/052H01M4/366Y02E60/10H01M4/04H01M10/05H01M10/02
Inventor 佐藤俊忠本田和义
Owner PANASONIC CORP
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