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Battery electrode or separator surface protective agent, battery electrode or separator protected by same, and battery having battery electrode or separator

A surface protective agent, battery electrode technology, applied in battery electrodes, non-aqueous electrolyte battery electrodes, battery pack components, etc., can solve the problems of many adhesives, reduced ionic conductivity, low mechanical strength, etc. High performance, excellent stress relaxation energy and low internal resistance

Active Publication Date: 2013-08-21
KYORITSU KAGAKU SANGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that the ion conductivity is lowered because the particles are covered with a binder having poor ion conductivity and the gaps between the particles are filled.
[0007] In addition, by using a granular binder to bind the active material and the conductive auxiliary agent, a method of preventing the decrease in ion conductivity caused by covering the active material and the conductive auxiliary agent with the adhesive has also been invented. In this method, There are problems in that the mechanical strength is low because there are many binders that do not form a continuous layer, and there are many voids between the active material and the conductive additive (Patent Document 4)

Method used

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  • Battery electrode or separator surface protective agent, battery electrode or separator protected by same, and battery having battery electrode or separator
  • Battery electrode or separator surface protective agent, battery electrode or separator protected by same, and battery having battery electrode or separator
  • Battery electrode or separator surface protective agent, battery electrode or separator protected by same, and battery having battery electrode or separator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0220] In Example 1, a method of manufacturing a lithium ion secondary battery using an electrode obtained by coating a battery electrode containing two types of organic particles or a separator surface protective agent composition on a negative electrode will be described.

[0221] (Manufacture of battery electrode or separator surface protective agent composition)

[0222] (Production of Fusion Bonded Organic Matter Particles 1)

[0223] Cyanoethylated pullulan (manufactured by Shin-Etsu Chemical Co., Ltd.: Cyanoresin CR-S, softening temperature = 90-110° C., hydrogen-bonding functional group value = 0.0005 mol / g or less) and pulverize to produce cyanoethylated pullulan particles with an average particle diameter of 3 μm.

[0224] (Preparation of Fusion Bonded Organic Particles 2)

[0225] Partially saponified polyvinyl alcohol (manufactured by KURARAY: PVA-205, value of hydrogen-bonding functional group = about 0.019 mol / g) was pulverized with a nano-jet mill (manufacture...

Embodiment 2

[0239] In Example 2, a method of manufacturing a lithium ion secondary battery using an electrode obtained by coating a battery electrode containing two types of organic particles or a separator surface protective agent composition on a negative electrode will be described.

[0240] (Manufacture of battery electrode protective agent composition)

[0241] (Production of Fusion Bonded Organic Matter Particles 1)

[0242] A 15% solution of N-methylpyrrolidone of polyvinylidene fluoride (manufactured by Kureha Co., Ltd.: Kureha KF Polymer#1120, softening temperature=160-180°C, hydrogen-bonding functional group value=0.0001mol / g or less) was spray-dried, Polyvinylidene fluoride particles having an average particle diameter of 3 μm were produced.

[0243] (Preparation of Fusion Bonded Organic Particles 2)

[0244] Made by the method of Example 1.

[0245] (mixture of two particles melt-bonded)

[0246] The powdery mixture was made by the method of Example 1 as a battery electrod...

Embodiment 3

[0258] In Example 3, a method of manufacturing a lithium ion secondary battery using an electrode obtained by coating a negative electrode with a battery electrode or a separator surface protective agent composition containing two types of organic particles and a solvent will be described.

[0259] (Production of Fusion Bonded Organic Matter Particles 1)

[0260] It was produced by the same method as Example 2.

[0261] (Preparation of Fusion Bonded Organic Particles 2)

[0262] It was produced by the method similar to Example 1.

[0263] (Fabrication of Compositions Containing Fusion Bonded Two Kinds of Particles)

[0264] Add 6000g of 2-methoxyethoxyethyl acetate, 700g of the above-mentioned organic particle 1, and 300g of organic particle 2 into a 10L beaker, and then stir evenly with a propeller mixer to obtain a liquid composition as a battery electrode or separator surface protection agent combination.

[0265] (production of positive electrode)

[0266] It was produc...

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Abstract

To solve the problems of low safety, high internal resistance, and poor high-rate charging / discharging properties, problems which are caused by low heat resistance and low voltage collapse resistance, a battery electrode surface or separator surface protective agent composition containing at least two types of organic particles obtained from substantially incompatible organic matter, having fluidity, and being capable of being cured and formed by a hot melt, is characterized by, when curing and forming the composition, the organic particles of the same type heat-sealing with one another and forming a continuous phase.

Description

technical field [0001] The present invention relates to a battery electrode or separator surface protective agent composition, a battery electrode or separator surface protection method using the same, a battery electrode or separator coated with the same and a battery comprising the battery electrode or separator. The battery has high heat resistance, low internal resistance, excellent charging and discharging cycle characteristics, large charging and discharging capacity, little deterioration of the active material layer after multiple cycles of charging and discharging for a long time, and long service life. Background technique [0002] For lithium-ion primary batteries and secondary batteries with high voltage and large capacity, calcium-ion primary batteries and secondary batteries, magnesium-ion primary batteries and secondary batteries, sodium-ion primary batteries and secondary batteries, charging and discharging Electric double layer capacitors with good rate chara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M2/16H01M4/02H01M4/04H01M4/139H01M50/443
CPCH01M10/0525H01M10/4235H01M4/62Y02E60/10H01M50/461H01M50/443H01M4/13H01M4/139H01M50/411H01M50/431H01M4/622H01M4/0402H01M4/0471H01M50/403Y02T10/70H01M4/604
Inventor 上村太一
Owner KYORITSU KAGAKU SANGYO KK
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