Energy storing assembly

A component and energy storage technology, applied in electrical components, structural parts, electrolytic capacitors, etc., can solve the problems of insufficient battery plate adhesion, large electrode impedance, poor battery performance, etc., to improve poor adhesion, reduce Plate resistance value, the effect of excellent battery characteristics

Active Publication Date: 2010-06-30
IND TECH RES INST
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide an energy storage assembly by mixing a polyacrylate water-based adhesive in the positive electrode, thereby basically overcoming the adhesion of the existing water-based adhesive to the positive electrode material in the slurry. Problems with insufficient force and very large electrode impedance, which in turn lead to defects in poor battery performance

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0028] [Example 1] Preparation of positive electrode structure containing polyacrylonitrile aqueous adhesive

[0029] First, 91 parts by weight of LiCoO 2 , 6 parts by weight of polyacrylonitrile (n=1,300) and 4 parts by weight of acetylene black (conductive powder) are dispersed in N-methylpyrrolidone (NMP) to form a slurry. After that, the slurry was coated on an aluminum foil. After drying, it is compressed and cut to prepare a positive electrode.

[0030] Mix 2 parts by volume of propylene carbonate (PC for short), 3 parts by volume of ethylene carbonate (EC for short) and 5 parts by volume of diethyl carbonate (DEC for short) as the organic electrolyte of the electrolyte solution. solvent. The lithium salt of this solution is LiPF 6 , the concentration is 1M. Next, the anode and the lithium cathode are separated by a polypropylene separator (PP), and the above-mentioned electrolyte solution is added to the accommodating area between the anode and the cathode. After ...

Embodiment 2

[0031] [Example 2] Preparation of positive electrode structure containing styrene-butadiene rubber (SBR) and polyacrylonitrile aqueous adhesive

[0032] First, 91 parts by weight of LiCoO 2 , 6 parts by weight of a mixture of styrene-butadiene rubber and polyacrylonitrile (n=1,300) (weight ratio of styrene-butadiene rubber:polyacrylonitrile=3:7) and 4 parts by weight of acetylene black ( conductive powder) is dispersed in N-methylpyrrolidone (NMP) to form a slurry. After that, the slurry was coated on an aluminum foil. After drying, it is compressed and cut to prepare a positive electrode.

[0033] 2 parts by volume of propylene carbonate (PC), 3 parts by volume of ethylene carbonate (EC), and 5 parts by volume of diethyl carbonate (DEC) were mixed as the organic solvent of the electrolyte solution. The lithium salt of this solution is LiPF 6 , the concentration is 1M. Next, the anode and the lithium cathode are separated by a polypropylene separator (PP), and the above-m...

Embodiment 3

[0034] [Example 3] Preparation of positive electrode structure containing polyacrylate and polyacrylonitrile aqueous adhesive

[0035] First, 91 parts by weight of LiCoO 2 , 6 parts by weight of polyacrylate (X is butyl, n=1,500) and polyacrylonitrile (n=1,300) mixture (weight ratio of polybutylacrylate: polyacrylonitrile=3:7) and 4 parts by weight of Acetylene black (conductive powder) was dispersed in N-methylpyrrolidone (NMP) to form a slurry. After that, the slurry was coated on an aluminum foil. After drying, it is compressed and cut to prepare a positive electrode.

[0036] 2 parts by volume of propylene carbonate (PC), 3 parts by volume of ethylene carbonate (EC), and 5 parts by volume of diethyl carbonate (DEC) were mixed as the organic solvent of the electrolyte solution. The lithium salt of this solution is LiPF 6 , the concentration is 1M. Next, the anode and the lithium cathode are separated by a polypropylene separator (PP), and the above-mentioned electrolyt...

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Abstract

The invention provides an energy storing assembly which comprises a positive electrode, a negative electrode and electrolyte, wherein the positive electrode is mixed with a polyacrylate aqueous adhesive. The polyacrylate aqueous adhesive has the chemical formula, wherein X is alkyl with the carbon number of 1-6, and n is 500-2,500.

Description

technical field [0001] The present invention relates to an energy storage component, in particular to an energy storage component in which a polyacrylate water-based adhesive is mixed with a positive electrode. Background technique [0002] With the development of portable electronic products and electric vehicles, energy storage components with high energy, fast charge and discharge, and long use time have become the main goal of development by all parties. [0003] Generally speaking, energy storage components can be divided into two types: batteries and capacitors. [0004] The battery itself uses the principle of chemical energy generated by redox to store electrical energy. Its design is mainly for long-term low-current discharge under normal use. Therefore, the development of electrode materials is focused on long-term use and high power. In terms of storage, it must have the characteristics of high energy density. [0005] At this stage, the use of adhesives for ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M10/40H01M4/62H01M4/04H01G9/00H01G9/042
CPCY02E60/12Y02E60/10
Inventor 王复民杨长荣李志聪李嘉甄朱永如彭杏威
Owner IND TECH RES INST
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