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Active material for nonaqueous electrolyte battery, electrode for nonaqueous electrolyte battery, nonaqueous electrolyte secondary battery and battery pack

A non-aqueous electrolyte and active material technology, applied in battery electrodes, secondary batteries, batteries, etc., can solve the problems of insufficient consideration of high capacity and cycle characteristics

Active Publication Date: 2016-06-15
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the balance between high capacity and cycle characteristics is not sufficient for such an active material, and further high capacity and cycle characteristics are required to be balanced and improved.

Method used

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  • Active material for nonaqueous electrolyte battery, electrode for nonaqueous electrolyte battery, nonaqueous electrolyte secondary battery and battery pack
  • Active material for nonaqueous electrolyte battery, electrode for nonaqueous electrolyte battery, nonaqueous electrolyte secondary battery and battery pack
  • Active material for nonaqueous electrolyte battery, electrode for nonaqueous electrolyte battery, nonaqueous electrolyte secondary battery and battery pack

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no. 1 Embodiment approach

[0018] The active material for non-aqueous electrolyte batteries of the first embodiment (hereinafter sometimes referred to as "active material") is a composite of at least two types of carbonaceous material and silicon-containing particles dispersed in the carbonaceous material. The particle contains at least one of silicon, silicon-containing alloy, and silicon oxide. In the argon ion laser Raman spectrum, it is at 1550 cm -1 Above and 1650cm -1 The half-value width (ΔG) of the peak with the maximum intensity I1 in the following range is 100 cm -1 Above and 150cm -1 Below, at 475cm -1 Above and 575cm -1 The following range has the highest intensity I2 peak relative to the above at 1550 cm -1 Above and 1650cm -1 The intensity ratio (I2 / I1) of the peak having the highest intensity I1 in the following range is 0.25 or more and 0.50 or less.

[0019] Hereinafter, as an explanation of the embodiment, the active material used in the active material mixture layer of the negative electro...

no. 2 Embodiment approach

[0047] The electrode for a non-aqueous electrolyte battery according to the second embodiment has an active material mixture layer containing the active material for a non-aqueous electrolyte battery according to the first embodiment. Specifically, it has a current collector and an active material mixture layer located on one or both sides of the current collector and containing an active material and a binder. The active material includes a carbonaceous material and a carbonaceous material dispersed in the carbonaceous material. A composite of at least two types of silicon particles. Hereinafter, the electrode of the embodiment will be described using the negative electrode as an example, but the electrode of the embodiment may be used for the positive electrode. In addition, in the following description, a non-aqueous electrolyte secondary battery is used as an example to describe the embodiment, but the electrode of the embodiment can be used for various batteries.

[0048] ...

no. 3 Embodiment approach

[0059] Next, the non-aqueous electrolyte battery according to the third embodiment will be described.

[0060] The non-aqueous electrolyte battery according to the third embodiment uses the electrode for the non-aqueous electrolyte battery of the second embodiment. Specifically, it includes an outer packaging material, a positive electrode housed in the outer package material, a negative electrode that is spatially separated from the positive electrode in the outer package material, for example, a negative electrode housed via a separator, and a non-aqueous electrolyte filled in the outer package material.

[0061] Hereinafter, the negative electrode, the positive electrode, the non-aqueous electrolyte, the separator, and the outer packaging material that are the components of the non-aqueous electrolyte secondary battery according to this embodiment will be described in detail.

[0062] (1) negative electrode

[0063] As the negative electrode, the negative electrode described in the...

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Abstract

An active material for a non-aqueous electrolyte battery according to the embodiment is a composite including at least: a carbonaceous substance; and silicon-containing particles dispersed in the carbonaceous substance, the silicon-containing particles including at least one of silicon, a silicon alloy and a silicon oxide, wherein in an argon ion laser Raman spectrum, the half-width ([Delta]G) of a peak having a maximum intensity I1 in the range of 1575 cm-1 or more and 1625 cm-1 or less is 100 cm-1 or more and 150 cm-1 or less, and the intensity ratio of a peak having a maximum intensity I2 in the range of 500 cm-1 or more and 550 cm-1 or less to the peak having the maximum intensity I1 in the range of 1575 cm-1 or more and 1625 cm-1 or less (I2 / I1) is 0.25 or more and 0.50 or less.

Description

[0001] References to related applications [0002] This application is based on Japanese Patent Application No. 2014-247139 filed on December 5, 2014, and enjoys the priority benefits of this application. This application contains the entire content of the application by referring to the application. Technical field [0003] The embodiments described here generally relate to active materials for non-aqueous electrolyte batteries, negative electrodes for non-aqueous electrolyte secondary batteries, non-aqueous electrolyte secondary batteries, and battery packs. Background technique [0004] In recent years, due to the rapid development of miniaturization technology of electronic devices, various portable electronic devices are becoming popular. In addition, batteries used as power sources for these portable electronic devices are also required to be downsized, and non-aqueous electrolyte secondary batteries with high energy density are attracting attention. [0005] In particular, at...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/48H01M4/587H01M4/131H01M4/133H01M4/134H01M10/0525
CPCH01M4/131H01M4/133H01M4/134H01M4/364H01M4/386H01M4/48H01M4/587H01M10/0525H01M4/366Y02E60/10H01M4/583H01M2220/30
Inventor 越崎健司深泽孝幸村松美穗森田朋和久保木贵志喜多由美子
Owner KK TOSHIBA
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