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Electrochemical power supply diaphragm, manufacturing method thereof, electrochemical battery or capacitor

An electrochemical and diaphragm technology, applied in the field of electrochemistry, can solve the problems of poor electrolyte wettability and low heat-resistant temperature, and achieve the effects of improving safety in use, high heat-resistant temperature, and increasing tensile strength

Inactive Publication Date: 2014-07-02
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of separator not only has poor wettability to the electrolyte, but also has a low heat resistance temperature.

Method used

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  • Electrochemical power supply diaphragm, manufacturing method thereof, electrochemical battery or capacitor

Examples

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Embodiment 1

[0030] A preparation method of an electrochemical power separator, comprising the following steps:

[0031] (1) Add PVDF-HFP with a mass content of 1% of hexafluoropropylene HFP into acetone, stir evenly, and prepare a PVDF-HFP acetone solution with a mass concentration of 10% of PVDF-HFP;

[0032] (2) Add deionized water to the above solution, and stir evenly to obtain an emulsion; the mass content of deionized water in the emulsion is 4%;

[0033] (3) Add PET fibers with a diameter of 2 microns and a length of 3 cm to the above emulsion, and stir and mix evenly to obtain a mixed emulsion;

[0034] (4) The obtained mixed emulsion was sprayed on a clean glass substrate, dried in an oven at 60° C. for 8 hours, and the glass substrate was removed to obtain an electrochemical power separator with a thickness of 20 μm.

[0035] The electrochemical power supply separator prepared in this embodiment was measured for porosity, pore size and air permeability. Among them, the porosit...

Embodiment 2

[0037] A preparation method of an electrochemical power separator, comprising the following steps:

[0038] (1) Add PVDF-HFP with a mass content of 4% of hexafluoropropylene HFP into acetone, stir evenly, and prepare a PVDF-HFP acetone solution with a mass concentration of 20% of PVDF-HFP;

[0039] (2) Add deionized water to the above solution, and stir evenly to obtain an emulsion; the mass content of deionized water in the emulsion is 10%;

[0040] (3) Add aramid fibers with a diameter of 1 micron and a length of 5 cm to the above emulsion, and stir and mix evenly to obtain a mixed emulsion;

[0041] (4) Scrape-coat the obtained mixed emulsion on a clean glass substrate, dry it in an oven at 80°C for 10 hours, remove the glass substrate, and obtain an electrochemical power separator with a thickness of 30 μm.

[0042] The electrochemical power supply separator prepared in this embodiment was measured for porosity, pore size and air permeability. Among them, the porosity an...

Embodiment 3

[0044] A preparation method of an electrochemical power separator, comprising the following steps:

[0045] (1) Add PVDF-HFP with a mass content of 10% of hexafluoropropylene HFP into acetone, stir evenly, and prepare a PVDF-HFP acetone solution with a mass concentration of 8% of PVDF-HFP;

[0046] (2) Add deionized water to the above solution, and stir evenly to obtain an emulsion; the mass content of deionized water in the emulsion is 1%;

[0047] (3) Add PAN fibers with a diameter of 10 microns and a length of 1 cm to the above emulsion, and stir and mix evenly to obtain a mixed emulsion;

[0048] (4) Scrape-coat the obtained mixed emulsion on a clean glass substrate, dry in an oven at 100°C for 6 hours, remove the glass substrate, and obtain an electrochemical power separator with a thickness of 30 μm.

[0049]The electrochemical power supply separator prepared in this embodiment was measured for porosity, pore size and air permeability. Among them, the porosity and pore...

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Abstract

The invention provides an electrochemical power supply diaphragm and a manufacturing method thereof. The method includes the steps that polyvinylidene fluoride-hexafluoropropylene is dissolved in acetone to prepare a polyvinylidene fluoride-hexafluoropropylene acetone solution with the mass concentration of 5-20%, then deionized water is added into the solution, and the mixture is uniformly stirred to obtain emulsion; the mass content of the deionized water in the emulsion is 1-10%; organic short fibers are added into the emulsion, and the mixture is uniformly mixed to obtain mixed emulsion; the obtained mixed emulsion is coated on a clean glass substrate, the glass substrate is removed after the mixed emulsion is dried, and accordingly the electrochemical power supply diaphragm is obtained. The organic short fibers are one or more of PET fibers, PAN fibers and aramid fibers. The electrochemical power supply diaphragm is proper in aperture and good in heat resistance and safety, and safety of an electrochemical battery or a capacitor can be effectively improved. The invention further provides the electrochemical battery or the capacitor using the diaphragm.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to an electrochemical power separator and a preparation method thereof. The invention also relates to an electrochemical cell or capacitor. Background technique [0002] With the development of human productivity, more and more cars are driving in the streets and alleys of cities and villages. The popularity of automobiles has brought great convenience to people's lives. However, the accompanying problems are becoming more and more serious. The consumption of non-renewable energy such as petroleum continues to accelerate, and the impact of vehicle exhaust emissions on the environment continues to expand. At present, in order to solve these problems, people propose to develop electric vehicles in order to replace traditional vehicles. The key lies in whether there is a power battery with sufficient energy density, power density, long enough cycle life, and safe and reliable power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/52H01G11/84H01M2/16H01M50/403H01M50/449
CPCY02E60/13
Inventor 周明杰钟玲珑王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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