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Cell diaphragm, its preparation method and zinc electrode secondary battery containing said diaphragm

A kind of separator and resistance technology, applied in the field of battery separator, its preparation and zinc electrode secondary battery containing the separator

Inactive Publication Date: 2009-01-14
上海世龙科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This separator needs to be sandwiched between two layers of microporous polyolefin membranes during use, and the reaction produces hydrogen gas, which is unfavorable for the development of sealed zinc electrode secondary batteries

Method used

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  • Cell diaphragm, its preparation method and zinc electrode secondary battery containing said diaphragm
  • Cell diaphragm, its preparation method and zinc electrode secondary battery containing said diaphragm
  • Cell diaphragm, its preparation method and zinc electrode secondary battery containing said diaphragm

Examples

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Comparison scheme
Effect test

preparation example Construction

[0017] The present invention provides a kind of preparation method for the separator of zinc electrode secondary battery, and it comprises the steps:

[0018] a) preparing a solution containing one or more grafting monomers;

[0019] b) performing irradiation grafting on the polymer microporous membrane base material in the solution to obtain a diaphragm;

[0020] c) drying the membrane.

[0021] a) Preparation of a solution containing one or more grafted monomers

[0022] In the method of the present invention, a solution containing one or more grafting monomers is first prepared. Applicable grafting monomers can be selected according to specific needs. For example, the grafting monomers of the present invention may be selected from C 2 ~C 10 Ethylenically unsaturated monomers, or polyoxyethylene ether oligomers containing phenolic groups and alkyl groups with a polymerization degree of less than 100.

[0023] The C 2 -C 10 Non-limiting examples of ethylenically unsat...

Embodiment 1

[0064] This example illustrates the effect of radiation dose on the final membrane produced.

[0065] After the polypropylene microporous membrane substrate is irradiated in the grafting solution whose main component octylphenol polyoxyethylene ether content is 10% by weight (solvent is water), the dosage listed in the following table 1 is taken out, and through pickling After drying, the membrane was obtained. The electrical properties and hydrophilic properties of the separator were tested according to the test standards, and the results are listed in Table 1 below.

[0066] Table 1

[0067]

[0068] The test results show that the resistance of the diaphragm is lower than 0.15Ω·cm when the irradiation dose is in the range of 1-20KGry 2 , The liquid absorption is greater than 100%.

Embodiment 2

[0070] This example illustrates the situation of diaphragms prepared with different concentrations of grafting solutions.

[0071] After the polypropylene microporous membrane substrate is irradiated with the same dose (10KGry) in the grafting liquid (the solvent is water) of the main component nonylphenol polyoxyethylene ether mass percentage content listed in the following table 2, and after washing Dry to obtain a membrane. The electrical properties and hydrophilic properties of the separator were tested according to the test standards, and the results are listed in Table 2 below.

[0072] Table 2

[0073]

[0074] The test results show that the grafted monomer concentration is in the range of 2-20% (weight percentage), and the resistance of the diaphragm is lower than 0.15Ω·cm 2 , The liquid absorption is greater than 100%.

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Abstract

The disclosed diaphragm includes basis material of polymer microporous membrane, and one or more materials selected from C2 - C10 olefinic bond unsaturated monomers, or monomer of polyethenoxy ether oligomer containing phenolic, alkyl group with polymerization degree lower than 100 grafted on the microporous membrane. Grafting ratio of basis material of polymer microporous membrane is 10 - 80úÑ, and resistance is 0.01 - 0.15 omegaíñcm2. The disclosed method includes steps: (1) preparing solution of containing one or more grafted monomer; (2) irradiation grafting is carried out for basis material of polymer microporous membrane in prepared solution so as to obtain diaphragm; irradiation dose is 1Kgry - 20Kgry; (3) drying grafted diaphragm. The disclosed diaphragm is applicable to secondary battery of zinc electrode such as nickel zinc cell, zinc silver oxide cell, zinc air cell etc, and suitable to nickel zinc cell especially.

Description

technical field [0001] The present invention relates to a separator for a zinc electrode secondary battery and a preparation method thereof, and to a secondary battery made with the separator. Background technique [0002] Zinc electrode secondary batteries are widely used in electronic devices, film and television equipment and electric vehicles and other fields. This battery uses zinc as the battery electrode material. Compared with traditional nickel-cadmium and lead-acid batteries, it not only has better electrical performance, but also has no pollution to the environment. Zinc electrode secondary batteries, especially zinc-nickel batteries, as one of the candidates for electric vehicle power supply, have advantages that other similar batteries cannot match, such as high specific energy, safety and environmental protection. The American Electrochemical Corporation has set the goal of using zinc-nickel batteries as the power source for portable electric tools and the sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/16C08J5/22C08J9/00H01M10/00H01M50/403H01M50/411H01M50/491
CPCY02E60/12Y02E60/10
Inventor 叶寅邱士龙张雪冰许体弘陈明达
Owner 上海世龙科技有限公司
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