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Electrode element, method of manufacturing electrode element, and lithium ion secondary battery

A technology of electrode components and positive electrodes, applied in the field of electrode components, can solve problems such as damage reduction, interface resistance, difficult to solve, and easy peeling of the surface coating layer

Inactive Publication Date: 2011-01-19
TOYOTA JIDOSHA KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the surface-coated positive electrode active material is mixed with a solid electrolyte to manufacture a positive electrode mixture layer of a pressed powder all-solid battery, the surface coating layer of the positive electrode active material tends to peel off, resulting in a tendency to damage the reduced interface. The problem with the effect of resistance
Even when the technique described in Electrochemistry Communications is combined with the techniques described in JP-A-2001-52733, JP-A-2001-6674 and JP-A-2004-175609, it is still difficult to solve the above problems

Method used

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  • Electrode element, method of manufacturing electrode element, and lithium ion secondary battery
  • Electrode element, method of manufacturing electrode element, and lithium ion secondary battery
  • Electrode element, method of manufacturing electrode element, and lithium ion secondary battery

Examples

Experimental program
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Effect test

no. 1 example

[0069] Dissolve equimolar LiOC in ethanol solvent 2 H 5 And Nb(OC 2 H 5 ) 5 To prepare the composition, and spray the composition to coat LiCoO using a rotary and flow coating machine (SFD-01 manufactured by Powrex Corporation) 2 s surface. Afterwards, the coated LiCoO was treated at atmospheric pressure and a temperature of 400°C 2 Heat treatment for 30 minutes to 2 (Active material) LiNbO is formed on the surface 3 Layer (coating layer), thereby preparing a positive electrode active material (having an average particle diameter of 10 μm, and the same applies to the following positive electrode active materials). Subsequently, the prepared positive electrode active material and solid electrolyte (Li 7 P 3 S 11 , 7μm average particle diameter, and the same applies to the following solid electrolyte) was placed in a screw bottle, and mixed using a shaker (manufactured by Shibata Scientific Technology, Ltd.) during 10 seconds to prepare Powder element (hereinafter, referred to as ...

no. 2 example

[0071] The prepared positive electrode active material was mixed with a solid electrolyte during five minutes using a spatula to prepare a powder element (hereinafter, referred to as "powder element of the second example"), and, in addition, used with the first The battery of the example has similar manufacturing steps and materials to manufacture the battery of the second example.

no. 3 example

[0087] Using a mortar, 1.5 mg of a conductive agent (vapor-grown carbon fiber, also applicable to the following conductive agent) was mixed with 5.3 mg of a solid electrolyte to prepare a mixture, and 0.8 mg of a positive electrode prepared by a method similar to that of the powder element of the first example was prepared. The electrode active material and the mixture were placed in a screw bottle, and they were mixed during 10 seconds using an oscillator to prepare a powder element (hereinafter, referred to as "powder element of the third example"). Then, a positive electrode layer was prepared using the powder element of the third example, and, except for this, a secondary battery was manufactured in the same manner as in the case of the battery of the first example (hereinafter, referred to as "the battery of the third example").

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Abstract

An electrode element contains a positive electrode active material and a second solid electrolyte. The positive electrode active material has an active material and a first solid electrolyte. Seventy percent or more of a surface of the active material is coated with the first solid electrolyte.

Description

Technical field [0001] The present invention relates to an electrode element including an active material and a solid electrolyte, a method of manufacturing the electrode element, and a lithium ion secondary battery having the electrode element. Background technique [0002] Lithium ion secondary batteries have higher energy density than other secondary batteries and can operate at high voltages. Thus, as a secondary battery, lithium ion secondary batteries have been used in information devices such as cellular phones due to their easily reduced size and weight. In recent years, there has been an increasing demand for using lithium ion secondary batteries as a high-power source for hybrid vehicles and the like. [0003] The lithium ion secondary battery includes a positive electrode layer, a negative electrode layer, and an electrolyte disposed between the above-mentioned layers. The electrolyte is composed of nonaqueous liquid or solid. When the electrolyte is composed of a non...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52H01M10/40H01M4/13H01M4/139H01M4/36H01M4/62H01M10/052H01M10/0562
CPCH01M4/1391H01M4/505H01M4/5825H01M10/0562Y02E60/122H01M4/525H01M2300/0088H01M4/131H01M2300/0071H01M10/0525H01M2300/0068Y10T29/49115Y02E60/10
Inventor 岡崎早苗土田靖P·徐高田和典
Owner TOYOTA JIDOSHA KK
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