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Si-based alloy negative electrode material for electricity storage devices and electrode using same

A negative electrode material and accumulator technology, applied in the direction of hybrid capacitor electrodes, battery electrodes, capacitors, etc., to achieve the effect of preventing collapse, obvious effect, and excellent charge-discharge cycle characteristics

Inactive Publication Date: 2017-04-26
SANYO SPECIAL STEEL COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this case, especially the initial charge and discharge, and the charge and discharge characteristics at high efficiency are also issues.

Method used

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  • Si-based alloy negative electrode material for electricity storage devices and electrode using same
  • Si-based alloy negative electrode material for electricity storage devices and electrode using same
  • Si-based alloy negative electrode material for electricity storage devices and electrode using same

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Embodiment

[0061] Hereinafter, the present invention will be specifically described by way of examples.

[0062] The negative electrode material powder for lithium ion secondary batteries of the composition shown in Tables 1-2 was produced by the single roll rapid cooling method, gas atomization method, etc. mentioned below. For the liquid quenching method, which is a single-roll quenching method, the raw material of a predetermined composition is put into a quartz tube with fine holes at the bottom, high-frequency melted in an Ar atmosphere to form a melt, and the melt is discharged to the center of a rotating copper roll. After the surface, a quenched belt in which the crystallite size of the Si phase was miniaturized was produced by utilizing the quenching effect by the copper roll. Then, the produced quenched belt was sealed in an Ar atmosphere together with zirconia balls, SUS304 balls, and SUJ2 balls in a tank-shaped container made of zirconia, SUS304, or SUJ2, and processed into p...

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Abstract

The present invention provides: an Si-based alloy negative electrode material which enables the achievement of excellent battery characteristics; and an electrode. This negative electrode material is a negative electrode material which is formed of an Si-based alloy and is for use in electricity storage devices wherein lithium ions move during charging and discharging. The negative electrode material which is formed of an Si-based alloy has an Si main phase that is composed of Si and a compound phase that is composed of Si and one or more elements other than Si. The compound phase comprises a phase containing a phase composed of Si and Cr or a phase composed of Si, Cr and Ti. The Si crystallite size in the Si main phase is 30 nm or less, and the crystallite size in the compound phase composed of Si and Cr or in the compound phase composed of Si, Cr and Ti is 40 nm or less. The total content of Cr and Ti is 21.1-40 at.%, and the ratio of Cr to Ti, specifically Cr% / (Cr% + Ti%) is within the range of 0.15-1.00.

Description

[0001] This application claims priority based on Japanese Patent Application No. 2014-187238 for which it applied on September 16, 2014, and takes in the indication content of the whole with reference to this specification. technical field [0002] The present invention relates to a Si-based alloy negative electrode material with excellent conductivity and an electrode using the same for an electrical storage device accompanied by movement of lithium ions during charge and discharge, such as a lithium ion secondary battery, a hybrid capacitor, and an all-solid lithium ion secondary battery. Background technique [0003] In recent years, along with the popularization of portable devices, the development of high-performance secondary batteries centered on lithium-ion batteries has been flourishing. In addition, the development of lithium-ion secondary batteries and hybrid capacitors in which the reaction mechanism is applied to the negative electrode is also becoming more and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01G11/06H01G11/30H01G11/38H01M4/62
CPCH01G11/06H01G11/30H01G11/38H01M4/38H01M4/62Y02E60/10H01G11/50H01M4/134H01M4/386H01M4/622H01M10/0525Y02E60/13
Inventor 广野友纪久世哲嗣仮屋哲朗泽田俊之
Owner SANYO SPECIAL STEEL COMPANY
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