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Slurry composition, electrode, electrode for non-aqueous electrolyte secondary battery, and method of manufacturing electrode for non-aqueous electrolyte secondary battery

A technology of composition and slurry, which is applied in non-aqueous electrolyte battery electrodes, non-aqueous electrolyte batteries, electrode manufacturing, etc., can solve the problems of reduced viscosity and poor adhesion, and achieve excellent viscosity stability and excellent adhesion. Effect

Inactive Publication Date: 2015-05-20
TAIYO INK MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the viscosity of existing slurry compositions sometimes gradually decreases after preparation
When the viscosity of the slurry composition decreases from the specified viscosity, there is a possibility that the adhesiveness of the slurry composition layer after the slurry composition is applied to the current collector and dried is poor.

Method used

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  • Slurry composition, electrode, electrode for non-aqueous electrolyte secondary battery, and method of manufacturing electrode for non-aqueous electrolyte secondary battery
  • Slurry composition, electrode, electrode for non-aqueous electrolyte secondary battery, and method of manufacturing electrode for non-aqueous electrolyte secondary battery
  • Slurry composition, electrode, electrode for non-aqueous electrolyte secondary battery, and method of manufacturing electrode for non-aqueous electrolyte secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～12

[0102] (Examples 1-12, Comparative Examples 1-4)

[0103] As Examples 1 to 12 and Comparative Examples 1 to 4, for the active materials for electrodes shown in Tables 1 to 4, polymer binder resins, thickeners / surfactants, conductive additives, and pH adjustment The acid of the agent was prepared according to the percentage of solid content shown in each table. Next, a pH adjuster is added to the mixture of the electrode active material and the conductive additive, and further mixed. A thickener / surfactant and a water-dispersible polymer binder resin were added to the mixture, stirred for 10 minutes with a propeller mixer, and ion-exchanged water was added to prepare a viscosity-adjusted slurry.

[0104] The obtained slurry was stored in an airtight container at room temperature, and the viscosity was measured using a rotary viscometer at each time shown in the table. In addition, the pH of the slurry was also measured. The measurement of pH was performed based on JIS Z8802....

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Abstract

[Problem] Provided is a slurry composition which has an excellent viscosity stability and thus, after being applied to a current collector for an electrode and drying, has an excellent adhesion with the current collector. [Solving Means] A slurry composition which is used for manufacturing an electrode for an electrochemical cell contains a lithium ion, comprising a polymer binder resin, a pH adjusting agent, and an active material, wherein the pH is from 2.0 to 9.0.

Description

technical field [0001] The present invention relates to a slurry composition, an electrode, an electrode for a nonaqueous electrolyte secondary battery, and a method for producing an electrode for a nonaqueous electrolyte secondary battery. Specifically, it relates to a slurry composition excellent in viscosity stability, an electrode using the slurry composition, an electrode for a nonaqueous electrolyte secondary battery using the electrode, and a method for producing an electrode for a nonaqueous electrolyte secondary battery. Background technique [0002] In recent years, the miniaturization and multifunctionalization of electronic components have advanced, and many portable electronic devices have appeared. These are required to be smaller and lighter, and the batteries used as their power sources are also required to be smaller and lighter. In addition, in the context of environmental issues and resource issues, development, manufacture, and sales of hybrid vehicles a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/04H01M4/13
CPCH01M4/13H01M4/139H01M4/62H01M4/622H01M10/052H01M4/0404Y02E60/10
Inventor 加藤文崇
Owner TAIYO INK MFG CO LTD