CN103000851B - A kind of lithium battery polysulfones nano fiber diaphragm and preparation method thereof - Google Patents
A kind of lithium battery polysulfones nano fiber diaphragm and preparation method thereof Download PDFInfo
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- CN103000851B CN103000851B CN201210558076.7A CN201210558076A CN103000851B CN 103000851 B CN103000851 B CN 103000851B CN 201210558076 A CN201210558076 A CN 201210558076A CN 103000851 B CN103000851 B CN 103000851B
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- polysulfones
- lithium battery
- nano fiber
- fiber diaphragm
- organic solvent
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- 229920002492 poly(sulfone) Polymers 0.000 title claims abstract description 91
- 239000002121 nanofiber Substances 0.000 title claims abstract description 59
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 55
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 239000003495 polar organic solvent Substances 0.000 claims abstract description 32
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 27
- 230000015556 catabolic process Effects 0.000 claims abstract description 11
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 11
- 230000005684 electric field Effects 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 6
- WFKAJVHLWXSISD-UHFFFAOYSA-N isobutyramide Chemical compound CC(C)C(N)=O WFKAJVHLWXSISD-UHFFFAOYSA-N 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 21
- 230000004888 barrier function Effects 0.000 description 19
- 239000000243 solution Substances 0.000 description 18
- 229910001220 stainless steel Inorganic materials 0.000 description 15
- 239000010935 stainless steel Substances 0.000 description 15
- MHABMANUFPZXEB-UHFFFAOYSA-N O-demethyl-aloesaponarin I Natural products O=C1C2=CC=CC(O)=C2C(=O)C2=C1C=C(O)C(C(O)=O)=C2C MHABMANUFPZXEB-UHFFFAOYSA-N 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- 230000035484 reaction time Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000002798 polar solvent Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000012512 characterization method Methods 0.000 description 3
- 238000001523 electrospinning Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 229920013655 poly(bisphenol-A sulfone) Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000004695 Polyether sulfone Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920006393 polyether sulfone Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 239000002305 electric material Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
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- Cell Separators (AREA)
- Artificial Filaments (AREA)
Abstract
The present invention relates to a kind of lithium battery polysulfones nano fiber diaphragm and preparation method thereof, belong to lithium battery diaphragm technical field.Described lithium battery polysulfones nano fiber diaphragm is dissolved in polar organic solvent by the multiple polysulfones of one or any ratio, make through electrostatic spinning again, it is characterized in that: described lithium battery polysulfones nano fiber diaphragm thickness is 10-50 μm, diameter is 100-300nm, elongation at break is 15-25%, heat decomposition temperature 250-350 DEG C, porosity 20-90%, mechanical tensile strength 15-20MPa, electric breakdown strength 1 × 10
7-1.5 × 10
7v/m.Lithium battery polysulfones nano fiber diaphragm of the present invention has tear-proof, heat resistanceheat resistant is shunk, high temperature resistant, high pressure resistant big current overcharges the advantage of (electricity), and homogeneity is good, and porosity is high.
Description
Technical field
The present invention relates to a kind of septum for lithium ion battery and preparation method thereof, specifically, the present invention relates to a kind of lithium battery polysulfones nano fiber diaphragm and preparation method thereof, belong to lithium battery diaphragm technical field.
Background technology
In the structure of lithium battery, barrier film is one of interior layer assembly of key.The performance of barrier film determines the interfacial structure, internal resistance etc. of battery, directly affects the characteristics such as the capacity of battery, circulation and security performance, and the barrier film of excellent performance has important effect to the combination property improving battery.Barrier film is a kind of high added value material that in lithium electric material, technology barriers are the highest, accounts for the 20%-30% of lithium battery cost.The main cause that barrier film holds at high price be some key technologies making barrier films by Japan and the U.S. monopolize, the index of domestic barrier film particularly high-end barrier film does not also reach the level of external product.Membrane technique difficult point is engineering and the basis material of pore-creating.Conventional membrane adopts polyethylene (PE) or polypropylene (PP), and these basis material fusing points are low, and at high temperature easy thermal contraction even melting causes membrane ruptures to cause serious safety problem.
Novel lithium battery, particularly electrokinetic cell and energy-storage battery are had higher requirement to membrane properties.With the method for electrostatic spinning, the method that the better high molecular polymer of fusing point is higher, chemical property is prepared into nano fiber diaphragm has been subjected to be paid close attention to widely.
Polysulfones (be called for short PSF or PSU) has splendid resistance to elevated temperatures, also has dimensional stability, numerous excellent properties such as chemical resistance, fire-retardant, electrical resistance, high strength, high dielectric strength, high rigidity.The nano fiber diaphragm prepared with this material has extraordinary resistance to elevated temperatures, also has the features such as porosity is high, resistance to deformation simultaneously, is very outstanding lithium electric separator of future generation, can greatly improves the fail safe of lithium electricity.
It is 201010221475.5 that State Intellectual Property Office discloses an application number in 2010.12.15, name is called the patent of invention of " a kind of membrane for polymer of aqueous solution electrochemical devices ", which discloses a kind of membrane for polymer of aqueous solution electrochemical devices.This barrier film for raw material with polysulfones engineering plastics and polyvinylpyrrolidone, is coated with after mixing is cast film by dissolution with solvents, forms after the electrochemical device electrolyte solution re-used containing lower alcohol carries out hydrophilicity-imparting treatment to film.The blend film homogeneous phase that the present invention obtains, densification, there is superior chemistry and thermal stability, and the mechanical performance of excellence and excellent electric conductivity, can as the diaphragm material of the aqueous solution electrochemical devices such as water electrolysis, battery, ultracapacitor, flow battery.
The homogeneity of the barrier film film forming in above-mentioned patent is poor, and porosity is limited; Its preparation method is solwution method, makes when large area prepares barrier film, the homogeneity of more restive film forming.
Summary of the invention
The present invention is intended to solve the problem that battery diaphragm homogeneity of the prior art is poor, porosity is limited, a kind of lithium battery polysulfones nano fiber diaphragm is provided, its tear resistance is strong, porosity is high, can high-low temperature resistant and mechanical performance excellent.
Another object of the present invention is to provide a kind of optimized fabrication method of above-mentioned polysulfones nano fiber diaphragm, and make the barrier film film forming homogeneity for preparing better, porosity is higher.
In order to realize foregoing invention object, its concrete technical scheme is as follows:
A kind of lithium battery polysulfones nano fiber diaphragm, described lithium battery polysulfones nano fiber diaphragm is dissolved in polar organic solvent by the multiple polysulfones of one or any ratio, make through electrostatic spinning again, it is characterized in that: described lithium battery polysulfones nano fiber diaphragm thickness is 10-50 μm, and diameter is 100-300nm, and elongation at break is 15-25%, heat decomposition temperature 250-350 DEG C, porosity 20-90%, mechanical tensile strength 15-20MPa, electric breakdown strength 1 × 10
7-1.5 × 10
7v/m.
Above-mentioned polysulfones is any conventional polysulfones well known in the art, as: polyarylsulfone (PAS), polyether sulfone, bisphenol-a polysulfone etc.
A kind of preparation method of lithium battery polysulfones nano fiber diaphragm, it is characterized in that: comprise following processing step: the multiple polysulfones of one or any ratio is dissolved in polar organic solvent at normal temperatures, polysulfones solution is obtained after stirring reaction, then described polysulfones solution is implemented electrostatic spinning in high voltage electric field under electric field strength is 10-50kV, after electrostatic spinning completes, collection obtains lithium battery polysulfones nano fiber diaphragm.
Preferably, polar solvent of the present invention is DMF (DMF) or DMA (DMAC).
Preferably, polar organic solvent of the present invention accounts for the 10-90% of polysulfones solution quality.
Further, the acetone of polar organic solvent quality 5-25% is added in described polar organic solvent.
Preferably, the stirring reaction time of the present invention is 1-5 hour.
Preferably, electrostatic spinning of the present invention complete after collection obtain polysulfones nano fiber diaphragm refer to adopt stainless steel drum collect.
Further, described stainless steel drum diameter is 0.3-0.8m.
A kind of lithium battery adopting above-mentioned lithium battery polysulfones nano fiber diaphragm to make.
The above-mentioned method preparing lithium battery is this area common process.
The Advantageous Effects that the present invention brings:
1, lithium battery polysulfones nano fiber diaphragm elongation at break of the present invention is 15-25%, heat decomposition temperature 250-350 DEG C, porosity 20-90%, mechanical tensile strength 15-20MPa, electric breakdown strength 1 × 10
7-1.5 × 10
7v/m, homogeneity is good, and porosity is high, is applicable to large-scale production;
2, lithium battery polysulfones nano fiber diaphragm of the present invention has tear-proof, heat resistanceheat resistant is shunk, high temperature resistant, high pressure resistant big current overcharges the advantage of (electricity), polysulfones nano fiber diaphragm of the present invention is applied to various high power capacity and high power battery diaphragm, as having huge potential market in automobile power cell and power energy storage industry;
3, the high-voltage electrostatic spinning preparation method of lithium battery polysulfones nano fiber diaphragm provided by the invention makes the film forming homogeneity of lithium battery polysulfones nano fiber diaphragm better, and porosity improves further;
4, in preparation method of the present invention, preferably in polar organic solvent, add acetone, contribute to nanofiber surface bright and clean, reduce burr; The preferred stirring reaction time makes to dissolve more fully simultaneously, improves production efficiency; After preferred electrostatic spinning completes, collection obtains polysulfones nano fiber diaphragm and adopts stainless steel drum collection, easy to clean, contributes to shaping nano-fiber cloth from sur-face peeling; Further limit the diameter of stainless steel drum, both ensure that and rotated flexibly, in turn ensure that spinning speed and velocity of rotation can be consistent, ensure that the quality of product.
Embodiment
embodiment 1
A kind of lithium battery polysulfones nano fiber diaphragm, described lithium battery polysulfones nano fiber diaphragm is dissolved in polar organic solvent by the multiple polysulfones of one or any ratio, make through electrostatic spinning again, described lithium battery polysulfones nano fiber diaphragm thickness is 10 μm, and diameter is 100nm, and elongation at break is 15%, heat decomposition temperature 250 DEG C, porosity 20%, mechanical tensile strength 15MPa, electric breakdown strength 1 × 10
7v/m.
embodiment 2
A kind of lithium battery polysulfones nano fiber diaphragm, described lithium battery polysulfones nano fiber diaphragm is dissolved in polar organic solvent by the multiple polysulfones of one or any ratio, make through electrostatic spinning again, described lithium battery polysulfones nano fiber diaphragm thickness is 50 μm, and diameter is 300nm, and elongation at break is 25%, heat decomposition temperature 350 DEG C, porosity 90%, mechanical tensile strength 20MPa, electric breakdown strength 1.5 × 10
7v/m.
embodiment 3
A kind of lithium battery polysulfones nano fiber diaphragm, described lithium battery polysulfones nano fiber diaphragm is dissolved in polar organic solvent by the multiple polysulfones of one or any ratio, make through electrostatic spinning again, described lithium battery polysulfones nano fiber diaphragm thickness is 30 μm, and diameter is 200nm, and elongation at break is 20%, heat decomposition temperature 300 DEG C, porosity 55%, mechanical tensile strength 17.5MPa, electric breakdown strength 1.25 × 10
7v/m.
embodiment 4
A kind of lithium battery polysulfones nano fiber diaphragm, described lithium battery polysulfones nano fiber diaphragm is dissolved in polar organic solvent by the multiple polysulfones of one or any ratio, make through electrostatic spinning again, described lithium battery polysulfones nano fiber diaphragm thickness is 21 μm, and diameter is 260nm, and elongation at break is 17%, heat decomposition temperature 271 DEG C, porosity 85%, mechanical tensile strength 19MPa, electric breakdown strength 1.35 × 10
7v/m.
embodiment 5
A kind of preparation method of lithium battery polysulfones nano fiber diaphragm, comprise following processing step: be dissolved at normal temperatures in polar organic solvent by the multiple polysulfones of one or any ratio, polysulfones solution is obtained after stirring reaction, then described polysulfones solution is implemented electrostatic spinning in high voltage electric field under electric field strength is 10kV, after electrostatic spinning completes, collection obtains lithium battery polysulfones nano fiber diaphragm.
embodiment 6
A kind of preparation method of lithium battery polysulfones nano fiber diaphragm, comprise following processing step: be dissolved at normal temperatures in polar organic solvent by the multiple polysulfones of one or any ratio, polysulfones solution is obtained after stirring reaction, then described polysulfones solution is implemented electrostatic spinning in high voltage electric field under electric field strength is 50kV, after electrostatic spinning completes, collection obtains lithium battery polysulfones nano fiber diaphragm.
embodiment 7
A kind of preparation method of lithium battery polysulfones nano fiber diaphragm, comprise following processing step: be dissolved at normal temperatures in polar organic solvent by the multiple polysulfones of one or any ratio, polysulfones solution is obtained after stirring reaction, then described polysulfones solution is implemented electrostatic spinning in high voltage electric field under electric field strength is 30kV, after electrostatic spinning completes, collection obtains lithium battery polysulfones nano fiber diaphragm.
embodiment 8
A kind of preparation method of lithium battery polysulfones nano fiber diaphragm, comprise following processing step: be dissolved at normal temperatures in polar organic solvent by the multiple polysulfones of one or any ratio, polysulfones solution is obtained after stirring reaction, then described polysulfones solution is implemented electrostatic spinning in high voltage electric field under electric field strength is 43kV, after electrostatic spinning completes, collection obtains lithium battery polysulfones nano fiber diaphragm.
embodiment 9
On the basis of embodiment 5-8:
Preferably, described polar solvent is DMF or DMA.
Preferably or further, described polar organic solvent accounts for 10% of polysulfones solution quality.
Further, the acetone of polar organic solvent quality 5% is added in described polar organic solvent.
Preferably, the described stirring reaction time is 1 hour.
Preferably, after described electrostatic spinning completes, collection obtains polysulfones nano fiber diaphragm and refers to that employing stainless steel drum is collected.
Further, described stainless steel drum diameter is 0.3m.
embodiment 10
On the basis of embodiment 5-8:
Preferably, described polar solvent is DMF or DMA.
Preferably or further, described polar organic solvent accounts for 90% of polysulfones solution quality.
Further, the acetone of polar organic solvent quality 25% is added in described polar organic solvent.
Preferably, the described stirring reaction time is 5 hours.
Preferably, after described electrostatic spinning completes, collection obtains polysulfones nano fiber diaphragm and refers to that employing stainless steel drum is collected.
Further, described stainless steel drum diameter is 0.8m.
embodiment 11
On the basis of embodiment 5-8:
Preferably, described polar solvent is DMF or DMA.
Preferably or further, described polar organic solvent accounts for 50% of polysulfones solution quality.
Further, the acetone of polar organic solvent quality 15% is added in described polar organic solvent.
Preferably, the described stirring reaction time is 3 hours.
Preferably, after described electrostatic spinning completes, collection obtains polysulfones nano fiber diaphragm and refers to that employing stainless steel drum is collected.
Further, described stainless steel drum diameter is 0.55m.
embodiment 12
On the basis of embodiment 5-8:
Preferably, described polar solvent is DMF or DMA.
Preferably or further, described polar organic solvent accounts for 75% of polysulfones solution quality.
Further, the acetone of polar organic solvent quality 12% is added in described polar organic solvent.
Preferably, the described stirring reaction time is 2 hours.
Preferably, after described electrostatic spinning completes, collection obtains polysulfones nano fiber diaphragm and refers to that employing stainless steel drum is collected.
Further, described stainless steel drum diameter is 0.72m.
embodiment 13
Select bisphenol-a polysulfone, primary structure, as shown in (I), is dissolved in N, and in the solvent of N-dimethyl formamide (DMF), stirring at normal temperature 5 hours, is made into the solution that mass fraction is 20%.
The electric field strength of electrospinning machining high voltage electric field is 40kV/m; The spun barrier film of electricity is collected on stainless steel drum.
Performance characterization: polysulfones nanofiber diameter is 100-300nm, mainly be distributed in about 200nm, the hot strength of this kind of barrier film is 18MPa, elongation at break is 16%, glass transition temperature is 190 DEG C, and heat decomposition temperature is 330 DEG C, porosity is 78%, electric breakdown strength is 1.2 × 10
7v/m.
（I）
embodiment 14
Select polyarylsulfone (PAS), primary structure, as shown in (II), is dissolved in N, and in the solvent of N-dimethyl formamide (DMF), stirring at normal temperature 5 hours, is made into the solution that mass fraction is 20%.
The electric field strength of electrospinning machining high voltage electric field is 50kV/m; The spun barrier film of electricity is collected on stainless steel drum.
Performance characterization: polysulfones nanofiber diameter is 100-300nm, mainly be distributed in about 280nm, the hot strength of this kind of barrier film is 20MPa, elongation at break is 23%, glass transition temperature is 240 DEG C, and heat decomposition temperature is 380 DEG C, porosity is 75%, electric breakdown strength is 1.5 × 10
7v/m.
（II）
embodiment 15
Select polyether sulfone, primary structure, as shown in (III), is dissolved in N, and in the solvent of N-dimethyl formamide (DMF), stirring at normal temperature 5 hours, is made into the solution that mass fraction is 20%.
The electric field strength of electrospinning machining high voltage electric field is 30kV/m; The spun barrier film of electricity is collected on stainless steel drum.
Performance characterization: polysulfones nanofiber diameter is 100-300nm, mainly be distributed in about 250nm, the hot strength of this kind of barrier film is 15MPa, elongation at break is 33%, glass transition temperature is 170 DEG C, and heat decomposition temperature is 300 DEG C, porosity is 82%, electric breakdown strength is 1.0 × 10
7v/m.
（III）
Claims (2)
1. a lithium battery polysulfones nano fiber diaphragm, described lithium battery polysulfones nano fiber diaphragm is dissolved in polar organic solvent by the multiple polysulfones of one or any ratio, make through electrostatic spinning again, it is characterized in that: described lithium battery polysulfones nano fiber diaphragm thickness is 10-50 μm, and diameter is 100-300nm, and elongation at break is 15-25%, heat decomposition temperature 250-350 DEG C, porosity 20-90%, mechanical tensile strength 15-20MPa, electric breakdown strength 1 × 10
7-1.5 × 10
7v/m;
Described lithium battery polysulfones nano fiber diaphragm is obtained by following methods: the multiple polysulfones of one or any ratio is dissolved in polar organic solvent N at normal temperatures, dinethylformamide or N, in N-dimethylacetylamide, polysulfones solution is obtained after stirring reaction 1-5 hour, then described polysulfones solution is implemented electrostatic spinning in high voltage electric field under electric field strength is 10-50kV, after electrostatic spinning completes, collection obtains lithium battery polysulfones nano fiber diaphragm; Described polar organic solvent accounts for the 10-90% of polysulfones solution quality, adds the acetone of polar organic solvent quality 5-25% in described polar organic solvent.
2. the lithium battery adopting lithium battery polysulfones nano fiber diaphragm as claimed in claim 1 to make.
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| CN201210558076.7A CN103000851B (en) | 2012-12-20 | 2012-12-20 | A kind of lithium battery polysulfones nano fiber diaphragm and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210558076.7A CN103000851B (en) | 2012-12-20 | 2012-12-20 | A kind of lithium battery polysulfones nano fiber diaphragm and preparation method thereof |
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| CN103000851B true CN103000851B (en) | 2015-08-26 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101007443A (en) * | 2007-01-26 | 2007-08-01 | 北京化工大学 | Preparation method of nanofiber toughening carbon fiber reinforced composite |
| CN102629679A (en) * | 2012-04-28 | 2012-08-08 | 中国科学院理化技术研究所 | Nanometer fiber lithium ion battery diaphragm material with composite structure and preparation method of nanometer fiber lithium ion battery diaphragm material |
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2012
- 2012-12-20 CN CN201210558076.7A patent/CN103000851B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101007443A (en) * | 2007-01-26 | 2007-08-01 | 北京化工大学 | Preparation method of nanofiber toughening carbon fiber reinforced composite |
| CN102629679A (en) * | 2012-04-28 | 2012-08-08 | 中国科学院理化技术研究所 | Nanometer fiber lithium ion battery diaphragm material with composite structure and preparation method of nanometer fiber lithium ion battery diaphragm material |
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Effective date of registration: 20180426 Address after: 610000 18 West core road, hi-tech West District, Chengdu, Sichuan Patentee after: Dongfang Electric Co., Ltd. Address before: 610036 Shu Han Road, Jinniu District, Chengdu, Sichuan Province, No. 333 Patentee before: Dongfang Electric Corporation |