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Anode active material for secondary battery and method for producing the same, anode and lithium ion battery using the same

一种负极活性物质、非晶性的技术，应用在二次电池用负极活性物质及其制造、使用其的负极以及锂离子电池领域，能够解决生产性不充分、容量不充分、无法充分发挥硅系材料特性等问题，达到充放电容量优异、循环特性优异的效果

Inactive Publication Date: 2017-10-17
JNC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the characteristics of silicon-based materials cannot be fully utilized, and the capacity is not sufficient
In addition, when an electrode is obtained by mixing a silicon-containing compound with a silicon-free organic compound, etc., the production method is not sufficient in terms of productivity.

Method used

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  • Anode active material for secondary battery and method for producing the same, anode and lithium ion battery using the same
  • Anode active material for secondary battery and method for producing the same, anode and lithium ion battery using the same
  • Anode active material for secondary battery and method for producing the same, anode and lithium ion battery using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0122] Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated more concretely, this invention is not limited to these Examples.

[0123] In this example, various analyzes and evaluations were performed on the silicon oxide-based composite materials, silica, and the like prepared in Examples 1 to 5, and Comparative Examples 1 and 2.

[0124] In addition, in the formula, Ph represents a phenyl group, and Me represents a methyl group.

[0125] In addition, the measuring devices and measuring methods of "X-ray diffraction measurement", "elemental analysis measurement", "laser Raman spectroscopy measurement" and "X-ray small-angle scattering measurement" and "battery characteristics" in each example and comparative example evaluation", as described below.

[0126] (measured by X-ray diffraction method)

[0127] X-ray diffraction is to use Bruker AXS (Bruker AXS) (stock) D8Discover manufactured as X-ray diffraction device, through t...

Synthetic example 1

[0144] Synthesis of Octaphenylsilsesquioxane (10)

[0145] 360 ml of toluene (Wako Pure Chemical Industry), 42.2 g of tetrabutylammonium hydroxide (Tokyo Chemical Industry) (37% tetrabutylammonium hydroxide (Tetrabutylammonium Hydroxide, TBAH) in MeOH), pure 16.2 g of water, stirred and cooled in an ice bath. 360 ml of diethyl ether (Wako Pure Chemical Industry) and 118.9 g of phenyltrimethoxysilane (Tokyo Chemical Industry) were put into a 500 ml dropping funnel, and were added dropwise over 5 minutes. After the dropwise addition, the ice bath was removed, and the mixture was stirred at room temperature for 70 hours. After 70 hours, filter through a pressure filter.

[0146] The obtained powder was transferred to a beaker, washed with toluene, and filtered again under pressure. After filtration, 14.3 g of octaphenylsilsesquioxane (10) was obtained by vacuum drying at 120 degreeC for 6 hours with a vacuum dryer.

Synthetic example 2

[0148] (PhSiO 3 / 2 ) n Synthesis

[0149] Into a 500 ml four-necked flask, 99.1 g of phenyltrimethoxysilane (Tokyo Chemical Industry) and 16 g of methanol (Wako Pure Chemical Industries) were charged. While stirring at room temperature, 36 g of 1N HCl was slowly added dropwise through the dropping funnel over 30 minutes. After completion of the dropwise addition, it was heated and stirred at 60° C. for 2 hours. After cooling for 2 hours, 200 g of toluene (Wako Pure Chemical Industry) was added dropwise.

[0150] Then, the reaction solution was transferred to a 500 ml separatory funnel. After washing with saturated saline, washed with saturated sodium bicarbonate water, then washed twice with saturated saline, and finally washed twice with pure water. After washing with water, dehydration was performed with magnesium sulfate (Wako Pure Chemical Industries, Ltd.). The liquid was moved to a separable flask, the solvent was distilled off, and heated under reduced pressure to ...

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Abstract

The invention relates to an anode active material for secondary battery containing a silicon oxide-based composite material that has excellent charging and discharging capacity and an improved capacity and circulation properties, and method for producing the same, anode and lithium ion battery using the same. The method is to form the silicon oxide-based composite material having new structure as directly obtained by pyrolyzing polysilsesquioxane having specific structure under an inert gas atmosphere, and the formed silicon oxide-based composite material having scattering recognized in a region: 0.02 A<-1><q<0.21 A<-1> in a spectrum measured by a small-angle X-ray scattering method, having graphite carbon in which scattering is recognized at 1,590 cm<-1> (G band / graphite structure) and 1,325 cm<-1> (D band / amorphous carbon), and a peak intensity ratio (ID / IG ratio) of amorphous carbon to crystalline carbon being in a range of 2.0 to 5.0 in a spectrum measured by Raman spectroscopy, and being represented by a general formula SiOxCy (0.5<x<1.8, 1<y<5).

Description

[0001] related divisional application [0002] This application is a divisional application of the international application for invention patent with the title of "negative electrode active material for secondary battery and its manufacturing method, negative electrode and lithium ion battery using it", application number 201380033830.8, and an application of the original application The date is April 25, 2013. technical field [0003] The present invention relates to a negative electrode active material for a secondary battery exhibiting high capacity, excellent charge-discharge characteristics, and cycle characteristics when used as a negative electrode active material for a lithium ion secondary battery, a method for producing the same, a negative electrode using the same, and lithium ion battery. [0004] More specifically, it relates to a negative electrode active material containing a silicon oxide-based composite material, a method for producing the same, a negative e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M4/48H01M10/0525
CPCH01M4/58H01M4/364H01M4/366H01M4/625H01M4/483H01M10/052H01M10/0525Y02E60/10H01M4/133H01M4/134H01M4/362H01M4/485H01M4/587H01M4/583
Inventor 大野胜彦岩谷敬三木崎哲朗金尾启一郎近藤正一
Owner JNC CORP
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