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Composite ceramic coating, lithium ion battery composite ceramic diaphragm and lithium ion battery

A technology of lithium-ion batteries and composite ceramics, which is applied to battery components, separators/films/diaphragms/spacers, circuits, etc., and can solve the problems of degraded battery electrochemical performance and increased internal resistance of lithium-ion batteries.

Inactive Publication Date: 2015-01-07
CHINA AVIATION LITHIUM BATTERY LUOYANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of composite ceramic paint, solve the problem that the internal resistance of the lithium-ion battery is increased by the ceramic diaphragm obtained from the existing paint, and the electrochemical performance of the battery is deteriorated

Method used

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  • Composite ceramic coating, lithium ion battery composite ceramic diaphragm and lithium ion battery
  • Composite ceramic coating, lithium ion battery composite ceramic diaphragm and lithium ion battery
  • Composite ceramic coating, lithium ion battery composite ceramic diaphragm and lithium ion battery

Examples

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Embodiment 1

[0046] The composite ceramic paint of the present embodiment comprises aluminum oxide powder (ceramic powder), Li 5 La 3 Ta 2 o 12 Powder (inorganic solid electrolyte powder), binder and water; the mass ratio of the ceramic powder to the inorganic solid electrolyte powder is 3:4, and the sum of the mass of the ceramic powder and the inorganic solid electrolyte powder is the water mass The mass of the binder is 2% of the sum of the mass of the ceramic powder and the inorganic solid electrolyte powder; the binder is PTFE and SBR, and the mass ratio of PTFE to SBR is 1:1.

[0047] The preparation method of the composite ceramic paint of the present embodiment is as follows:

[0048] Take 15kg of Al2O3 powder and 20kg of Li 5 La 3 Ta 2 o 12 Add the powder into the deionized water of the formulated amount, disperse with a stirrer at a speed of 300 rpm for 30 minutes, add the formulated amount of PTFE and SBR, disperse at a high speed of 1200 rpm for 120 minutes, and then per...

Embodiment 2

[0053] The composite ceramic coating of the present embodiment comprises silicon dioxide powder (ceramic powder), Li 2 O-P 2 o 5 Binary system powder (inorganic solid electrolyte powder), binder and water; the mass ratio of the ceramic powder to the inorganic solid electrolyte powder is 2:5, the sum of the mass of the ceramic powder and the inorganic solid electrolyte powder It is 50% of the mass of water, and the mass of the binder is 5% of the sum of the mass of the ceramic powder and the inorganic solid electrolyte powder; the binder is PTFE.

[0054]The preparation method of the composite ceramic paint of the present embodiment is as follows:

[0055] Take 10kg of silica powder and 25kg of Li 2 O-P 2 o 5 Add the binary system powder into deionized water with the formula amount, disperse with a stirrer at a speed of 500rpm for 60min, add the formula amount of PTFE, disperse at a speed of 1500rpm for 100min at a high speed, and perform vacuum defoaming treatment to obta...

Embodiment 3

[0060] The composite ceramic coating of the present embodiment comprises barium sulfate powder (ceramic powder), Li 2 O-P 2 o 5 -B 2 o 3 Ternary system powder (inorganic solid electrolyte powder), binder and water; the mass ratio of the ceramic powder to the inorganic solid electrolyte powder is 1:6, the sum of the mass of the ceramic powder and the inorganic solid electrolyte powder The mass of water is 29.2%, and the mass of binder is 9% of the sum of the mass of ceramic powder and inorganic solid electrolyte powder; the binder is CMC and PTFE, and the mass ratio of PTFE to CMC is 6:5.

[0061] The preparation method of the composite ceramic paint of the present embodiment is as follows:

[0062] Take 5kg of barium sulfate powder and 30kg of Li 2 O-P 2 o 5 -B 2 o 3 The ternary system powder is added to deionized water with the prescribed amount, dispersed with a stirrer at a speed of 600rpm for 50 minutes, added with the prescribed amount of PTFE and CMC, dispersed ...

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Abstract

The invention discloses a composite ceramic coating, a lithium ion battery composite ceramic diaphragm and a lithium ion battery. The composite ceramic coating comprises ceramic powder and solid electrolyte powder, wherein the mass ratio of the ceramic powder to the solid electrolyte powder is (1:19) to (1-9). The composite ceramic coating disclosed by the invention comprises ceramic powder and inorganic solid electrolyte powder, the ceramic powder is high-temperature resistant, the inorganic solid electrolyte powder is excellent in ionic conductivity, and when a composite ceramic layer is formed on the surface of a base film by using the coating, on one hand, the mechanical property and the high-temperature resistant shrinkage property of the diaphragm are improved, and furthermore the high-temperature stability and the safety of the lithium battery are improved; on the other hand, the ionic conductivity of the ceramic diaphragm is improved, the internal resistance of the lithium ion battery is effectively reduced, and the electrochemical performance of the lithium ion battery is improved.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a composite ceramic paint, and also relates to a lithium ion battery composite ceramic separator using the paint and a lithium ion battery using the separator. Background technique [0002] Lithium-ion batteries have been widely used in small and medium-sized electrical appliances such as mobile communications, digital products, and electric tools due to their advantages such as high energy density, high output voltage, no memory effect, excellent cycle performance, and environmental friendliness. With the vigorous promotion of new energy vehicles at home and abroad, lithium-ion batteries have become the first choice for electric vehicle power sources due to their unique advantages. [0003] In general, the structure of a lithium-ion battery includes a positive electrode, a negative electrode, a separator, an electrolyte, and a battery case. Lithium-ion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16
CPCH01M50/409Y02E60/10
Inventor 刘娇怀永建贾海王海文白莉张海峰张国军
Owner CHINA AVIATION LITHIUM BATTERY LUOYANG
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