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Electrolyte diaphragm

A technology of electrolyte diaphragm and conductive carbon, which is applied in the direction of circuits, electrical components, battery pack components, etc., and can solve the problems of poor mechanical strength of polar polyvinylidene fluoride membrane, poor non-polar surface interface, poor ion conductivity, etc. problems, to achieve good interface stability, good thermal stability, and good wettability

Inactive Publication Date: 2013-04-03
昆山美好新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, battery separators are mainly made of non-polar polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET) or polar polyvinylidene fluoride (PVDF). Poor surface interface, poor mechanical strength of polar polyvinylidene fluoride film, high temperature dissolution, poor ionic conductivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mix non-polar polymers, polar polymers, inorganic particles, and conductive carbon materials evenly, then heat the mixture to melt, and stretch it by dry or wet method to form a composite electrolyte separator. Wherein, the non-polar polymer can be polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), or polypropylene (PP), polyethylene (PE) , a mixture of polyethylene terephthalate (PET); the polar polymer can be polyvinylidene fluoride (PVDF), polyphenol oxidase (PPO), polyethylene oxide (PEO), polymethyl Polymethyl acrylate (PMMA), polyphosphoryl cyanide, polyacrylonitrile (PAN), polyvinyl chloride (PVC), but also polyvinylidene fluoride (PVDF), polyphenol oxidase (PPO), polyethylene oxide ( PEO), polymethyl methacrylate (PMMA), polyphosphoryl cyanide, polyacrylonitrile (PAN), polyvinyl chloride (PVC) and the like; the inorganic particles can be silicon dioxide (SiO2), lithium nitride (Li3N), aluminum oxide (Al2O3), titanium dioxide (TiO2), zeolit...

Embodiment 2

[0022] According to the following formula ingredients, the mass fraction of inorganic particles is 0.5%, the mass fraction of conductive carbon material is 0.5%, the mass fraction of non-polar polymer is 50%, and the mass fraction of polar polymer is 49%. Then, the inorganic particles, conductive carbon materials, non-polar polymers and polar polymers are uniformly mixed and heated to melt, and then stretched by dry method or wet method to form a composite electrolyte diaphragm. Wherein, the non-polar polymer can be polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), or polypropylene (PP), polyethylene (PE) , a mixture of polyethylene terephthalate (PET); the polar polymer can be polyvinylidene fluoride (PVDF), polyphenol oxidase (PPO), polyethylene oxide (PEO), polymethyl Polymethyl acrylate (PMMA), polyphosphoryl cyanide, polyacrylonitrile (PAN), polyvinyl chloride (PVC), but also polyvinylidene fluoride (PVDF), polyphenol oxidase (PPO), polyethylene oxi...

Embodiment 3

[0024] According to the following formula ingredients, the mass fraction of inorganic particles is 0.1%, the mass fraction of conductive carbon material is 0.9%, the mass fraction of non-polar polymer is 49%, and the mass fraction of polar polymer is 50%. Then, the inorganic particles, conductive carbon materials, non-polar polymers and polar polymers are uniformly mixed and heated to melt, and then stretched by dry method or wet method to form a composite electrolyte diaphragm. The non-polar polymer can be polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), or polypropylene (PP), polyethylene (PE), polyethylene A mixture of ethylene terephthalate (PET); the polar polymer can be polyvinylidene fluoride (PVDF), polyphenol oxidase (PPO), polyethylene oxide (PEO), polymethacrylic acid Methyl ester (PMMA), polyphosphoryl cyanide, polyacrylonitrile (PAN), polyvinyl chloride (PVC), also polyvinylidene fluoride (PVDF), polyphenol oxidase (PPO), polyethylene oxide...

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Abstract

The invention discloses an electrolyte diaphragm. The electrolyte diaphragm comprises the following components in percentage by mass: 0 to 5 percent of inorganic particles, 0 to 5 percent of a conductive carbon material, 45 to 50 percent of non-polar macromolecules, and 45 to 50 percent of polar macromolecules. Compared with the prior art, the electrolyte diaphragm disclosed by the invention has the advantages of good thermal stability, good interface stability, high mechanical strength, good wettability, good ionic conductivity and the like.

Description

technical field [0001] The invention relates to the field of batteries, in particular to an electrolyte separator for batteries. Background technique [0002] A battery is a device that converts chemical energy into electrical energy through a potential difference. According to technology, it can be divided into electrochemical cells, fuel cells and solar cells, among which electrochemical cells can be divided into non-rechargeable primary batteries and rechargeable secondary batteries. [0003] In a secondary battery, the separator is an important part of the secondary battery, which connects and separates the positive and negative electrodes, which is an insulator of electrons but allows ions to migrate through. The performance of the separator determines key characteristics such as battery capacity, cycleability, and charge-discharge current density. Therefore, a separator with excellent performance plays an important role in improving the overall performance of the bat...

Claims

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Application Information

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IPC IPC(8): H01M2/16
CPCY02E60/10
Inventor 石峰
Owner 昆山美好新能源科技有限公司
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