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Inorganic coating slurry coated on diaphragm, manufacturing method and inorganic coating diaphragm

An inorganic coating and diaphragm technology, applied in the field of inorganic coating diaphragm and inorganic coating slurry, can solve the problems of limited battery performance improvement, achieve excellent wetting effect, excellent liquid retention capacity, good coating uniformity and adhesion The effect of knot strength

Inactive Publication Date: 2021-02-02
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the performance improvement of these types of coated separators is limited and cannot meet people's increasing demand for battery performance improvement

Method used

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  • Inorganic coating slurry coated on diaphragm, manufacturing method and inorganic coating diaphragm
  • Inorganic coating slurry coated on diaphragm, manufacturing method and inorganic coating diaphragm
  • Inorganic coating slurry coated on diaphragm, manufacturing method and inorganic coating diaphragm

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preparation example Construction

[0029] The preparation method of the above-mentioned inorganic coating slurry comprises the following steps,

[0030] (1) Add binder, stabilizer and organic solvent according to the ratio, and disperse at high speed for 1-3 hours to form a dispersion;

[0031] (2) Add tricalcium silicate to the dispersion, and disperse at high speed in a high-speed disperser for 2-5 hours;

[0032] (3) After adding the surfactant, disperse at a low speed for 0.5-1 hour, and pass through a 100-300 mesh screen to obtain the inorganic coating slurry coated on the diaphragm.

[0033] In the above steps (1) and (2), the high-speed dispersion temperature is 20-40°C, the speed is 1000-2000rpm, and the revolution is 10-80rpm; in the step (3), the low-speed dispersion temperature is 20-40°C, the speed 100-500rpm, revolution 10-80rpm.

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Abstract

The invention discloses an inorganic coating slurry coated on a diaphragm. The inorganic coating slurry comprises the following components in parts by weight: 20-40 parts of tricalcium silicate, 2-12parts of a binder, 0.5-3 part of a surfactant, 0.5-3 part of a stabilizer and 20-80 parts of an organic solvent, a solid content of the inorganic coating slurry is not less than 25%, and the viscosityof the inorganic coating slurry is less than 200mPa. S. Compared with an inorganic ceramic coating diaphragm in the prior art, the inorganic coating diaphragm prepared by taking tricalcium silicate as an inorganic main material has the following advantages that the inorganic coating diaphragm has relatively low thermal shrinkage, and the tricalcium silicate has very high heat resistance; and theinorganic coating taking tricalcium silicate as a main component can be used as a skeleton to support a base membrane to prevent shrinkage when the diaphragm is heated to shrink.

Description

technical field [0001] The invention relates to the technical field of diaphragms, in particular to an inorganic coating slurry coated on a diaphragm, a manufacturing method and an inorganic coating diaphragm. Background technique [0002] Lithium-ion batteries have a series of advantages: high specific energy, long cycle life, no memory effect, no pollution to the environment, high safety, fast charging and discharging, etc., so they have become the characteristics of new power supply technology research in recent years. At present, the technical route of pure electric vehicles is roughly divided into two types: ternary batteries and lithium iron phosphate batteries: ternary materials have obvious advantages in battery energy density, high-rate charging, and low-temperature performance, while lithium iron phosphate materials have long life and safety. high. If the safety of power batteries can be improved, new energy vehicles will usher in great development. The diaphragm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/431H01M50/449H01M10/0525C09D1/00C09D7/65
CPCC09D1/00C09D7/65H01M10/0525Y02E60/10
Inventor 周保福陈萌王义飞
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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