Ceramic diaphragm, and preparation method and application thereof

A ceramic diaphragm and diaphragm material technology, applied in electrical components, electrochemical generators, circuits, etc., can solve problems such as loss of isolation function, easy fire, and difference in diaphragm performance, so as to reduce VOC emissions, reduce fire risks, The effect of reducing energy consumption

Active Publication Date: 2014-02-12
PANYU NANSHA YAN TIN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the battery has a thermal runaway and generates a large amount of heat, and the temperature rises further to 160°C or above, the separator will melt and decompose or rupture, lose its isolation function, and the two poles will be short-circuited, which will lead to even more immeasurable dangers such as battery explosion. sexual appearance
Moreover, in the above-mentioned preparation method of the c

Method used

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  • Ceramic diaphragm, and preparation method and application thereof

Examples

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Example Embodiment

[0028] Example 1

[0029] Add 20g of alumina to 80g of water-soluble polyvinylidene fluoride, and add an appropriate amount of water. Use a stirrer to perform high-speed dispersion at a speed of 100rpm or more. During the dispersion process, add 0.1-3% of the ceramic particle weight. ) Base phenol polyoxyethylene ether, and 0.1-3% of the weight of the ceramic particles polyethylene glycol type polyol, the dispersed slurry is stirred for 30-60 minutes, and then subjected to vacuum defoaming treatment to obtain a protective layer slurry;

[0030] The protective layer is coated on the diaphragm material substrate, and then dried to form a ceramic diaphragm film roll material, and finally cut into various width specifications of the finished ceramic diaphragm roll material.

[0031] Such as figure 1 As shown, the intermediate layer of the ceramic diaphragm prepared above is the diaphragm material base material 1, and the diaphragm material base

[0032] The material is a PP film layer or...

Example Embodiment

[0033] Example 2

[0034] Add 30g of alumina to 70g of water-soluble acrylic resin, and add an appropriate amount of water, and use a stirrer to perform high-speed dispersion at a speed of 100rpm or more. During the dispersion process, add 0.1-3% of the weight of the ceramic particle defoamer, and The dispersant accounts for 0.1-3% of the weight of the ceramic particles. After the dispersed slurry is stirred for 30-60 minutes, vacuum degassing is performed to obtain a protective layer;

[0035] The protective layer is coated on the diaphragm material substrate, and then dried to form a ceramic diaphragm film roll material, and finally cut into various width specifications of the finished ceramic diaphragm roll material.

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Abstract

The invention discloses a ceramic diaphragm, and a preparation method and application thereof. The ceramic diaphragm comprises a diaphragm material substrate; the surface of the diaphragm material substrate is coated with a protective layer; the protective layer comprises 0.1% to 50% of ceramic particles and 50% to 99.9% of water-based polymer resin in percentage by weight. According to the invention, the water-based polymer resin is adopted to dispersing the ceramic particles, the use of poisonous N-methylpyrrolidine ketone with a high steam point can be avoided, an organic solvent is not required at all in the production process, solvent volatilization is eliminated, the emission of VOC is reduced, environmental protection is facilitated, energy consumed in the ceramic diaphragm production process can be lowered effectively, the risk of fire hazard can be reduced, and the cost can be lowered.

Description

technical field [0001] The invention relates to a ceramic diaphragm, in particular to an environmentally friendly and energy-saving ceramic diaphragm, a preparation method and application thereof. Background technique [0002] As an energy storage system with high energy density, high output voltage, no memory effect, excellent cycle performance, and environmental friendliness, lithium-ion battery has good economic benefits, social benefits and strategic significance, and has been widely used in mobile Communications, digital products and other fields, and it is very likely to become the most important power supply system in the field of energy storage and electric vehicles. [0003] The ceramic diaphragm is specially used to isolate the positive and negative electrodes of high-power lithium-ion batteries. It can not only isolate the contact between the positive electrode and the negative electrode of the battery, but also not hinder the electrolyte from penetrating the di...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M10/0525H01M50/414H01M50/434
CPCY02E60/122H01M50/403H01M50/446Y02E60/10
Inventor 周嘉林李兆辉藤川昇朱淑娴
Owner PANYU NANSHA YAN TIN CHEM
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