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Attapulgite Clay Slurry for Li-ion Batteries

A technology of attapulgite clay and lithium-ion batteries, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of blocking lithium-ion conduction, high binder content, and reduced capacity, so as to reduce slurry costs and energy The effect of reducing power consumption and reducing the probability of hole plugging

Active Publication Date: 2017-02-08
JIANGSU QINGTAO ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the spherical shape of the main component of this type of ceramic slurry and the high content of binder, it is easier to block the pores in the original polyolefin separator, thereby blocking the conduction of lithium ions inside the battery, resulting in high internal resistance and reduced capacity.

Method used

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  • Attapulgite Clay Slurry for Li-ion Batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: select the attapulgite clay that the purity of Jiangsu Xuyi produces is 98% to purify fiber powder; The fiber average length in the fiber structure of this product is 0.75 micron, and the average diameter is 0.05 micron; Weigh this purified mineral powder 500.0g, polyethylene 37.5 g of diol was dissolved in 650.0 g of water, and stirred at a high speed for 30 minutes; finally, 62.5 g of aqueous polyvinylidene fluoride was added, and stirred evenly at a slow speed to obtain an attapulgite clay slurry.

Embodiment 2

[0017] Example 2: Select attapulgite clay with a purity of 98% from Xuyi, Jiangsu Province to purify fiber powder; the average fiber length in the fiber structure of this product is 1 micron, and the average diameter is 0.75 micron; 500.0 g of purified mineral powder, polyethylene glycol Dissolve 2 g of alcohol in 745.0 g of water and stir at high speed for 30 minutes; finally add 3 g of water-based polyvinylidene fluoride and stir evenly at a slow speed to obtain attapulgite clay slurry.

Embodiment 3

[0018] Embodiment 3: choose the attapulgite clay that the purity of Jiangsu Xuyi produces is 98% to purify fiber powder; The fiber average length in the fiber structure of this product is 1 micron, and the average diameter is 0.75 micron; Take carboxymethyl cellulose 15.0g, dissolve In 460.0 g of water, weigh 500.0 g of purified mineral powder and add it into the solution, and stir at high speed for 45 minutes; finally add 25 g of styrene-butadiene latex, and stir evenly at a slow speed to obtain attapulgite clay slurry.

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Abstract

The invention discloses attapulgite clay slurry for lithium ion batteries. The slurry is applied to coating of ceramic diaphragms of the lithium ion batteries. The attapulgite clay slurry consists of 40-60wt% of attapulgite clay, 0.1-5wt% of a water-based adhesive, 0.1-2wt% of a water-based dispersant and the balance being water. The slurry disclosed by the invention is stable in viscosity and not easy to settle; the attapulgite clay slurry is infiltrative for polymer diaphragms of the lithium ion batteries prepared by adopting a dry process and a wet process, and is significant in cost advantage compared with universal aluminum oxide, zirconium oxide or colloid ceramic diaphragm slurry.

Description

technical field [0001] The invention relates to the field of development and utilization of natural minerals, in particular to an attapulgite clay slurry applied to coating ceramic separators of lithium-ion batteries. Background technique [0002] With the continuous development of productivity, energy issues have become a major issue facing mankind. Lithium-ion secondary batteries, as a key element in new energy sources, have broad economic prospects and market space. In order to ensure the safety of lithium-ion batteries, lithium-ion batteries are equipped with separator layers that separate the positive and negative electrodes. At present, polyolefin porous membranes are widely used as lithium-ion battery separators due to their advantages such as electrochemical inertness, high strength, adjustable pore size, easy thinning, and easy industrialization. However, the melting point of polyolefin porous membrane is low, the melting point of polyethylene PE is 130°C, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62
CPCY02E60/10
Inventor 李峥冯玉川杨帆杨伟峰南策文
Owner JIANGSU QINGTAO ENERGY TECH
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