A kind of preparation method of ceramic coating diaphragm

A technology of ceramic coating and diaphragm, which is applied in the direction of electrical components, circuits, battery pack parts, etc., can solve the problems of low bonding strength and uneven ceramic coating, and achieve improved thermal shrinkage performance, improved wettability, Effect of improving battery life

Active Publication Date: 2017-07-25
ZHANGJIAGANG NENGCI MATERIAL SCI & TECHCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ozone treatment is applied to the diaphragm substrate before coating, so that the wettability of the diaphragm and the water-based adhesive is significantly improved, and the uneven ceramic coating and low bonding strength caused by the poor wettability of the diaphragm substrate and the water-based adhesive system are overcome. Defects

Method used

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  • A kind of preparation method of ceramic coating diaphragm
  • A kind of preparation method of ceramic coating diaphragm
  • A kind of preparation method of ceramic coating diaphragm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of ceramic slurry

[0031] ①Add deionized water and 0.2μm silica, ceramic powder and deionized water to the vacuum, high-speed, planetary stirring equipment with ultrasonic oscillation function (speed 0~3000r / min adjustable, ultrasonic frequency 20kHz oscillation) The weight ratio of water is 30: 70, 3000r / min high-speed stirring and ultrasonic vibration for 0.5 hours;

[0032] ② Add sodium polyacrylate with 5% slurry amount, stir at 3000r / min at high speed while ultrasonic vibration for 0.5 hours;

[0033] ③ Add 0.5% glycerin of slurry amount, stir at 3000r / min at high speed while ultrasonic vibration for 2 hours;

[0034] ④ Add 10% carboxyl styrene butadiene rubber (SBR) (prepared to 50% emulsion), and add 5% sodium carboxymethyl cellulose (CMC) (prepared to 2% solution) ; 3000r / min high-speed stirring while ultrasonic vibration for 2 hours;

[0035] ⑤ Reduce the speed to 500 r / min, turn off the ultrasonic vibration, turn on the vacuum, stir for 0.5 hours, the...

Embodiment 2

[0042] (1) Preparation of ceramic slurry

[0043] ①Add deionized water, silicon oxide with a particle size of 0.8μm and zirconia with a particle size of 1.0 to the vacuum, high-speed, planetary stirring equipment with ultrasonic oscillation function (speed 0~3000r / min adjustable, ultrasonic frequency 20kHz oscillation) , Zinc oxide with a particle size of 0.4 (weight ratio is 7:2.5:0.5), the weight ratio of ceramic powder (silica, zirconia, zinc oxide mixture) and deionized water is 10: 90, 2000r / min high-speed stirring and ultrasonic Shake for 1 hour;

[0044] ② Add 0.5% of the slurry amount of sodium orthophosphate, sodium silicate, sodium lauryl sulfate (weight ratio 1:1:1), 2000r / min high-speed stirring and ultrasonic vibration for 1 hour;

[0045] ③ Add 10% of N-methylpyrrolidone, alcohol, and propylene carbonate (weight ratio 1:1:1) with a slurry amount of 10%, stirring at a high speed of 2000r / min and ultrasonic vibration for 1 hour;

[0046] ④ Add LA133 glue with 6% slurry vo...

Embodiment 3

[0054] (1) Preparation of ceramic slurry

[0055] ①Add deionized water and aluminum oxide with a particle size of 0.4μm and a particle size of 0.05 to the vacuum, high-speed, planetary stirring equipment with ultrasonic oscillation function (speed 0~3000r / min adjustable, ultrasonic frequency 20kHz oscillation) Magnesium oxide (weight ratio 9:1), the weight ratio of ceramic powder (a mixture of aluminum oxide and magnesium oxide) and deionized water is 5:95, 1500r / min high-speed stirring and ultrasonic vibration for 2 hours;

[0056] ② Add 3% of the slurry amount of sodium polymetaphosphate and ammonia (weight ratio 3:1), 1500r / min high-speed stirring and ultrasonic vibration for 2 hours;

[0057] ③ Add 5% dimethyl sulfoxide, polyoxyethylene alkyl phenol ether, polyoxyethylene fatty alcohol ether, polyvinyl alcohol (weight ratio 1:1:1:0.5) with 5% slurry amount, and stir at 1500r / min at high speed Ultrasonic vibration for 2 hours;

[0058] ④ Add LA134 glue with 1% slurry volume; 1500r...

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Abstract

The invention relates to a preparation method for a ceramic coating separator material used to lithium ion batteries. The preparation method comprises steps of preparation of a ceramic slurry, separator pretreatment, precise coating, drying and the like. The prepared product has the characteristics that the ceramic coating is compact, uniformly and firm in adhesion and the separator is small in thermal shrinkage, and the prepared product has obvious effect on improving safety performance of the lithium ion battery and prolonging battery service life.

Description

Technical field [0001] The invention relates to a ceramic coating diaphragm for a lithium ion battery, which belongs to the field of new energy materials. Background technique [0002] Since the 1990s, lithium-ion batteries have been widely used in portable electronic devices such as notebook computers, digital cameras, and mobile phones. At the same time, it is also widely used in electric vehicles and large-scale energy storage systems. [0003] Lithium-ion batteries have the best performance among the current industrialized energy storage secondary batteries. They have excellent characteristics such as high energy density, long life, and high power density. They are currently the first choice for energy storage batteries for electric vehicles. However, the safety issues of lithium-ion power batteries (the lithium-ion batteries that are generally used in electric vehicles and other fields with large capacity and high power are called lithium-ion power batteries) are still unsati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/16C04B35/10C04B35/48C04B35/14C04B35/01C04B35/46C04B35/622
CPCC04B35/01C04B35/10C04B35/14C04B35/46C04B35/48C04B35/622H01M50/446Y02E60/10
Inventor 李荐杨亮周宏明
Owner ZHANGJIAGANG NENGCI MATERIAL SCI & TECHCO LTD
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