CN101154749A - Gel polymer electrolyte film used for high-capacity polymer lithium ion power cell - Google Patents
Gel polymer electrolyte film used for high-capacity polymer lithium ion power cell Download PDFInfo
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- CN101154749A CN101154749A CNA2006100536584A CN200610053658A CN101154749A CN 101154749 A CN101154749 A CN 101154749A CN A2006100536584 A CNA2006100536584 A CN A2006100536584A CN 200610053658 A CN200610053658 A CN 200610053658A CN 101154749 A CN101154749 A CN 101154749A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to a gel polymer electrolyte film for high volume polymer lithium ion power battery, of which a power battery can provide power for equipments such as electric automobiles, electric motorcycles, electric bicycles and uninterrupted power supplies, etc. The gel polymer electrolyte film of the invention is made by impregnating the micro-porous membrane with the electrolyte, wherein, the micro-porous membrane is made by impregnating the polymeric materials, the inorganic fillers and the organic solvent; the porosity of the micro-porous membrane is between 20 to 70 percent. The invention improves the mechanical intensity, the thermal stability and the electrochemical stability of the gel polymer electrolyte film and enhances the anti-overcharging, anti-thermal shock, anti-impact and anti-extrusion capabilities of the battery, which improves the safety performance of the battery.
Description
Technical field
The present invention relates to a kind of gel polymer electrolyte film, be mainly used in the gel polymer lithium ion electrokinetic cell, this electrokinetic cell can be equipment such as electric automobile, battery-operated motor cycle, electric bicycle and uninterrupted power supply electrical source of power is provided.
Background technology
The whole world face day by day serious environmental problem and following oil equal energy source will exhausted situation under, seeking regenerative resource has become human urgent task.One of novel green power supply that electrokinetic cell is given priority to as present world developed country has better market prospect at aspects such as electric motor car, battery-operated motor cycle, electric tool, mobile electronic devices.Present electrokinetic cell mainly contains three kinds of lead-acid battery, nickel-cadmium cell and lithium ion batteries, the history in existing more than 200 year of the use of lead-acid battery, but along with people's environmental consciousness constantly strengthens, its use is banned use of by more and more countries, its specific energy is low also to have limited its use, and lead-acid battery more and more can not satisfy people's requirement.Nickel-cadmium cell is because memory effect and cadmium pollution, its output also will reduce gradually, and that lithium ion battery has is pollution-free, memory-less effect, specific energy height (energy density be lead-acid battery 3-4 doubly, 2 times of Ni-MH battery), advantage such as light weight, obtained fast development in recent years, in mobile communication and notebook computer, be widely used, aspect electrokinetic cell, also will have wide development space.Electrokinetic cell requires higher relatively to aspects such as security performance, specific powers, polymer Li-ion battery is owing to adopt the gel polymer electrolyte film film replacement liquid electrolyte that has ionic conductivity and have the barrier film effect concurrently, do not have free liquid electrolyte to exist, improved the security performance of battery greatly.
Polymer lithium ion power cell on the market is liquid and flexible package type lithium ion battery at present, the research of gel-type polymer lithium-ion-power cell is very few, and patent of the present invention is primarily aimed at the mechanical strength, thermal stability and the electrochemical stability that improve the gel-type polymer electrolyte film and has carried out detailed elaboration.
Summary of the invention
The object of the present invention is to provide a kind of used for high-capacity polymer lithium ion power cell gel polymer electrolyte film, it and both positive and negative polarity adopt square stacked battery structure to can be made into high-capacity polymer lithium ion power cell.By improving gel polymer electrolyte film mechanical strength, thermal stability and electrochemical stability, improve anti-over-charging, heat shock resistance, shock resistance, the anti-extrusion ability of battery, and then improve the security performance of battery.
Above-mentioned technical purpose of the present invention solves by the following technical programs:
A kind of used for high-capacity polymer lithium ion power cell gel polymer electrolyte film, it soaks electrolyte by microporous barrier and makes, it is characterized in that: microporous barrier is made by polymeric material, inorganic filler, plasticizer and organic solvent, and its porosity is between 20%-70%.
As preferably, the used polymeric material of described microporous barrier is two kinds of mixture of polymers that degree of crystallinity is different.
As preferably, polymeric material is that hexafluoropropylene content accounts for the Kynoar of 0-10% and hexafluoropropylene copolymer and hexafluoropropylene content greater than 10% the Kynoar and the mixture of hexafluoropropylene copolymer.
As preferably, electrolyte is formulated by adding one or more lithium salts in the mixed solvent of two or more organic solvent; Described organic solvent is vinyl carbonate, propylene carbonate, dimethyl carbonate, ethyl-methyl carbonic ester, diethyl carbonate, gamma-butyrolacton, sultone, and described lithium salts is selected from following at least a: lithium perchlorate, lithium hexafluoro phosphate, LiBF4, fluorocarbon based fluorine oxygen lithium phosphate, fluorocarbon based sulfonic acid lithium.
As preferably, inorganic filler is selected from least a in the following material: one of silicon dioxide, alundum (Al, titanium dioxide, di-iron trioxide, zirconia or combination in any; Plasticizer is selected from least a in the following material: repefral (DMP), dibutyl phthalate (DBP), ethylene carbonate, propene carbonate, dimethyl carbonate, diethyl carbonate, dipropyl carbonate.
The polymer amorphous area that hexafluoropropylene content is high is more, help the absorption of electrolyte, but intensity is poor slightly, and the lower polymer of hexafluoropropylene content is owing to contain more crystal region, intensity is higher, and the two is carried out blend, has not only guaranteed the absorption of electrolyte, and improved mechanical strength, thermal stability and the electrochemical stability of dielectric film, help the raising of the combination property of battery.This co-mixing system has effectively improved anti-over-charging, heat shock resistance, shock resistance, the anti-extrusion ability of battery, and then has improved the security performance of battery.
Embodiment
Below by specific embodiment, technical scheme of the present invention is described in further detail.
Embodiment 1
Kynoar and the copolymer of hexafluoropropylene and PVDF-HFP, 1800g dibutyl phthalate, 650g silicon dioxide and the 8500g acetone blending and stirring of 1000g HFP%=12% with 200g HFP%=5%, make the water white transparency polymer solution of thickness, with this solution casting on the PET film, dry back extracts in methyl alcohol, finally obtain microporous barrier behind the vacuum drying, immersion obtains gel polymer electrolyte film in electrolyte.The copolymer of described Kynoar and hexafluoropropylene is called for short PVDF-HFP, and above-mentioned percentage is the ratio that the HFP polymerized unit accounts for the total unit number of copolymerization, and described dibutyl phthalate is called for short DBP.Described electrolyte solution is the electrolyte that the mixed solution of propylene carbonate, dimethyl carbonate and ethyl-methyl carbonic ester adds fluorocarbon based fluorine oxygen lithium phosphate gained.
Embodiment 2
PVDF-HFP, 1800g dibutyl phthalate, 650g alundum (Al and 8500g acetone blending and stirring with 200g PVDF and 1000g HFP%=12%, make the water white transparency polymer solution of thickness, with this solution casting on the PET film, dry back extracts in ether, finally obtain microporous barrier behind the vacuum drying, immersion obtains gel polymer electrolyte film in electrolyte, and described electrolyte solution is the electrolyte solution that the mixed solution of vinyl carbonate and propylene carbonate adds lithium perchlorate and lithium hexafluoro phosphate gained.
Embodiment 3
1000g PVDF-HFP, 1800g propene carbonate, 650g silicon dioxide and 8500g acetone blending and stirring with PVDF-HFP and the HFP%=12% of 200g HFP%=3%, make the water white transparency polymer solution of thickness, with this solution casting on the PET film, dry back extracts in methyl alcohol, finally obtain microporous barrier behind the vacuum drying, immersion obtains gel polymer electrolyte film in electrolyte.
Embodiment 4
1000g PVDF-HFP, 1800g propene carbonate, 650g titanium dioxide and 8500g acetone blending and stirring with PVDF, the HFP%=12% of 200g HFP%=6%, make the water white transparency polymer solution of thickness, with this solution casting on the PET film, dry back extracts in ether, finally obtain microporous barrier behind the vacuum drying, immersion obtains gel polymer electrolyte film in electrolyte.
Embodiment 5
PVDF-HFP, 1800g dibutyl phthalate, 650g alundum (Al and 8500g acetone blending and stirring with PVDF, the 1000g HFP%=12% of 200g HFP%=6%, make the water white transparency polymer solution of thickness, with this solution casting on the PET film, dry back extracts in methyl alcohol, finally obtain microporous barrier behind the vacuum drying, immersion obtains gel polymer electrolyte film in electrolyte.
Embodiment 6
PVDF-HFP, 1800g propene carbonate, 650g titanium dioxide and 8500g acetone blending and stirring with 200g PVDF and 1000g HFP%=12%, make the water white transparency polymer solution of thickness, with this solution casting on the PET film, dry back extracts in ether, finally obtain microporous barrier behind the vacuum drying, immersion obtains gel polymer electrolyte film in electrolyte.
Claims (6)
1. used for high-capacity polymer lithium ion power cell gel polymer electrolyte film, it soaks electrolyte by microporous barrier and makes, it is characterized in that: microporous barrier is made by polymeric material, inorganic filler, plasticizer and organic solvent, and its porosity is between 20%-70%.
2. gel polymer electrolyte film according to claim 1 is characterized in that the used polymeric material of described microporous barrier is two kinds of mixture of polymers that degree of crystallinity is different.
3. gel polymer electrolyte film according to claim 2 is characterized in that polymeric material is that hexafluoropropylene content accounts for the Kynoar of 0-10% and hexafluoropropylene copolymer and hexafluoropropylene content greater than 10% the Kynoar and the mixture of hexafluoropropylene copolymer.
4. according to claim 1 or 2 or 3 described gel polymer electrolyte films, it is characterized in that electrolyte is formulated by adding one or more lithium salts in the mixed solvent of two or more organic solvent; Described organic solvent is one or more in vinyl carbonate, propylene carbonate, dimethyl carbonate, ethyl-methyl carbonic ester, diethyl carbonate, gamma-butyrolacton, the sultone, and described lithium salts is selected from following at least a: lithium perchlorate, lithium hexafluoro phosphate, LiBF4, fluorocarbon based fluorine oxygen lithium phosphate, fluorocarbon based sulfonic acid lithium.
5. according to claim 1 or 2 or 3 described gel polymer electrolyte films, it is characterized in that the used inorganic filler of described microporous barrier is selected from least a in the following material: one of silicon dioxide, alundum (Al, titanium dioxide, di-iron trioxide, zirconia or combination in any; Plasticizer is selected from least a in the following material: repefral, dibutyl phthalate, ethylene carbonate, propene carbonate, dimethyl carbonate, diethyl carbonate, dipropyl carbonate.
6. gel polymer electrolyte film according to claim 4 is characterized in that the used inorganic filler of described microporous barrier is selected from least a in the following material: one of silicon dioxide, alundum (Al, titanium dioxide, di-iron trioxide, zirconia or combination in any; Plasticizer is selected from least a in the following material: repefral, dibutyl phthalate, ethylene carbonate, propene carbonate, dimethyl carbonate, diethyl carbonate, dipropyl carbonate.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006100536584A CN101154749A (en) | 2006-09-28 | 2006-09-28 | Gel polymer electrolyte film used for high-capacity polymer lithium ion power cell |
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| CNA2006100536584A CN101154749A (en) | 2006-09-28 | 2006-09-28 | Gel polymer electrolyte film used for high-capacity polymer lithium ion power cell |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280065B (en) * | 2008-05-29 | 2011-06-29 | 复旦大学 | Polymer film having micropore structure, preparation and application thereof |
| CN102585280A (en) * | 2011-12-30 | 2012-07-18 | 黑龙江省科学院大庆分院 | Carbon material modified porous polymer electrolyte membrane and preparation method thereof |
| WO2014032407A1 (en) * | 2012-08-28 | 2014-03-06 | 华为技术有限公司 | Silicon negative electrode pole piece of lithium ion battery and preparation method thereof, and lithium ion battery |
| CN104650375B (en) * | 2015-03-17 | 2017-08-11 | 长沙理工大学 | A kind of preparation method of composite polymer electrolyte membrane |
| CN108270031A (en) * | 2016-12-30 | 2018-07-10 | 财团法人工业技术研究院 | colloidal electrolyte and application thereof |
-
2006
- 2006-09-28 CN CNA2006100536584A patent/CN101154749A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280065B (en) * | 2008-05-29 | 2011-06-29 | 复旦大学 | Polymer film having micropore structure, preparation and application thereof |
| CN102585280A (en) * | 2011-12-30 | 2012-07-18 | 黑龙江省科学院大庆分院 | Carbon material modified porous polymer electrolyte membrane and preparation method thereof |
| CN102585280B (en) * | 2011-12-30 | 2013-08-07 | 黑龙江省科学院大庆分院 | Preparation method of carbon material modified porous polymer electrolyte membrane |
| WO2014032407A1 (en) * | 2012-08-28 | 2014-03-06 | 华为技术有限公司 | Silicon negative electrode pole piece of lithium ion battery and preparation method thereof, and lithium ion battery |
| CN104650375B (en) * | 2015-03-17 | 2017-08-11 | 长沙理工大学 | A kind of preparation method of composite polymer electrolyte membrane |
| CN108270031A (en) * | 2016-12-30 | 2018-07-10 | 财团法人工业技术研究院 | colloidal electrolyte and application thereof |
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