CN106784462A - A kind of lithium battery for new-energy automobile - Google Patents
A kind of lithium battery for new-energy automobile Download PDFInfo
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- CN106784462A CN106784462A CN201611125981.8A CN201611125981A CN106784462A CN 106784462 A CN106784462 A CN 106784462A CN 201611125981 A CN201611125981 A CN 201611125981A CN 106784462 A CN106784462 A CN 106784462A
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- energy automobile
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Cell Separators (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
Abstract
The invention discloses a kind of lithium battery for new-energy automobile, belong to field of lithium, it is intended to improve the security and service life of lithium battery, including positive plate（1）, negative plate（2）, positive plate is positioned at positive electrode（3）In, negative plate is located at negative material（4）In, described positive plate is connected with anode ear（101）, negative plate connection negative electrode lug（201）, barrier film is provided between both positive and negative polarity（7）.
Description
Technical field
The present invention relates to field of lithium.
Background technology
In the structure of lithium battery, barrier film is one of crucial interior layer assembly.For lithium battery series, because electrolyte is
Organic solvent system, so that have the diaphragm material of organic solvent-resistant, typically using polyolefin porous membrane.
But the insufficient strength of polyolefin porous membrane, aperture is uneven, and battery easily breaks down when in use, institute
To occur in that with polyimides lithium battery film.
Application No. 201410147627.X, a kind of entitled polyimide nano lithium ion battery separator preparation method and
The patent of invention of its product discloses a kind of preparation method of polyimide nano lithium ion battery separator and products thereof, its preparation
Method is comprised the following steps：The preparation of polyamic acid solution：By the diaminodiphenyl ethers of 4,4' mono- and the double neighbour's benzene of the oxygen of 4,4' mono-
Dicarboxylic acid anhydride is by a certain percentage in dimethylacetylamide（DMAc）Middle polycondensation is obtained；The preparation of melt：By resulting polymers solution
Solidification at a certain temperature obtains solidfied material, then solidfied material is melted below its fusing point in the range of 20-30 DEG C, obtains half hitch
Brilliant melt；It is prepared by barrier film：The melt that will be obtained is processed through melt spinning, recrystallization, cold and hot stretching and thermal finalization series of process
Obtain a nanometer barrier film；Barrier film is post-processed：Including diluent and some residual solvent in removal barrier film, polyamides is dried in a vacuum
Amino acid barrier film；Imidization is processed：Polyamic acid nanometer barrier film to preparing carries out high temperature imidization treatment and obtains polyamides Asia
Amine nanometer barrier film.Obtained excellent product performance, simple processing.But the tensile property of this barrier film, particularly longitudinal direction draw
Stretching performance, gas permeability etc. has a certain degree of deficiency, is not suitable for the demand of present lithium battery, particularly answering in new energy car
With aspect.
The content of the invention
It is an object of the invention to：For above-mentioned problem, there is provided a kind of lithium battery for new-energy automobile, skill
Art scheme is as follows：
Lithium battery disclosed by the invention includes positive plate, negative plate, and positive plate is located in positive electrode, and negative plate is located at negative pole material
In material, described positive plate is connected with anode ear, and negative plate connection negative electrode lug is provided with barrier film between both positive and negative polarity.
Used as improvement, described battery ambient shell is provided with buffering heat dissipating layer between described shell and battery, described
Buffering heat dissipating layer is made up of the elastic polyurethane containing conductive particle.
Used as improvement, described conductive particle is gold particle, silver particles, copper particle, iron particle, one kind of aluminum particulate, matter
Amount accounting is 5%-50%.
Used as improvement, described barrier film includes enhancing film and basement membrane, and described basement membrane is the polyimide base film containing phenyl ring,
Described enhancing film is non-woven membrane.
Further, described basement membrane is prepared by the diamine monomer containing phenyl ring and dianhydride monomer raw material, described containing phenyl ring
Diamine monomer be selected from 2- dimethyl-p-phenylenediamines, p-phenylenediamine, the chloro- 1,2- phenylenediamines of 4-, NPD, isophthalic two
Amine, 5- Trifluoromethyl-1s, the bromo- 1,2- phenylenediamines of 3- phenylenediamines, 4-, 3- nitro -1,2- phenylenediamines.
Preparation method is as follows：
Step 1：Diamine monomer containing phenyl ring is added in the middle of all higher boiling proton solvents in an inert atmosphere, stirring is caused
Diamine monomer is completely dissolved, dianhydride monomer is added afterwards, described diamine monomer and dianhydride monomer mol ratio containing phenyl ring are
1:1, wherein described dianhydride monomer point 2-5 each equivalent within half an hour is added, in 60 DEG C -80 DEG C of temperature of low temperature
Lower reaction 2-10 hours, obtains polyamic acid solution, and wherein polyamic acid mass concentration is 10%-50%.
Step 2：Polyamic acid solution after step 1 is added into inorganic nano pore-forming substance, stirring.
Step 3：Material after step 2 is carried out into electrostatic spinning, wherein enhancing film receive, wherein spinning temperature be 30 DEG C-
60 DEG C, the spinning time is 2-10 hours；
Step 4:Film after the completion of spinning carries out hot imidization, and carries out pore-forming, obtains described composite diaphragm.
Lithium battery for new-energy automobile according to claim 7, it is characterised in that the higher boiling proton is molten
Agent is dimethylacetylamide, sub-phosphono triamine, one kind of Hexaethyl Asia phosphoric triamide.
The as claimed in claim 6 lithium battery for being used for new-energy automobile, it is characterised in that inorganic nano pore-forming substance is
Boron carbide, tungsten carbide, carborundum, titanium carbide, silicon nitride, titanium nitride, aluminium nitride, boron nitride, barium sulfate, cadmium sulfide, copper sulfide,
The mixture of one or more of calcium sulfate, zinc sulphide, zinc oxide, silica.
Lithium battery disclosed by the invention can play a part of buffering by buffering heat dissipating layer, when there is external impacts, and
Can quick heat radiating, protect battery, lithium of the invention electricity, closed pore temperature is low, broken film temperature is high, and improves to a certain extent
Tensile property, reduces battery membranes and is pierced the negative effect brought.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Marked in figure：1- positive plates, 101- anode ears, 2- negative plates, 201- negative electrode lugs, 3- positive electrodes, 4- negative materials, 5-
Shell, 6- buffering heat dissipating layers.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Specific embodiment 1：Present embodiment discloses a kind of lithium battery for new-energy automobile, including positive plate 1, negative pole
Piece 2, positive plate is located in positive electrode 3, and negative plate is located in negative material 4, and described positive plate is connected with anode ear 101,
Negative plate connects negative electrode lug 201, and barrier film 7 is provided between both positive and negative polarity.
Battery ambient is provided with shell 5, and buffering heat dissipating layer 6, described buffering radiating are provided between described shell and battery
Layer is made up of the elastic polyurethane containing conductive particle, and conductive particle is aluminum particulate, and quality accounting is 20%.
Lithium battery diaphragm includes enhancing film and basement membrane, and described basement membrane is the polyimide base film of phenyl ring, described enhancing
Film is non-woven membrane.
Basement membrane is prepared by the diamine monomer containing phenyl ring and dianhydride monomer raw material.
Described preparation method is as follows：
Step 1：2- dimethyl-p-phenylenediamines are added in the middle of all higher boiling proton solvents in an inert atmosphere, it is right that stirring is caused
Diamine monomer is completely dissolved, and adds maleic anhydride monomer afterwards, described diamine monomer and dianhydride monomer mol ratio containing phenyl ring
It is 1:1, wherein points of 2 times each equivalent additions within half an hour of described dianhydride monomer, 2 are reacted at a temperature of 60 DEG C of low temperature
Hour, polyamic acid solution is obtained, wherein polyamic acid mass concentration is 50%.
Step 2：Polyamic acid solution after step 1 is added into inorganic nano pore-forming substance, stirring.
Step 3：Material after step 2 is carried out into electrostatic spinning, wherein enhancing film is received, wherein spinning temperature is 30 DEG C,
The spinning time is 2 hours；
Step 4:Film after the completion of spinning carries out hot imidization, and carries out pore-forming, obtains described composite diaphragm.
Wherein, the higher boiling proton solvent is dimethylacetylamide.
Inorganic nano pore-forming substance is boron carbide.
Specific embodiment 2：It is that barrier film preparation method is different with the difference of embodiment 1, it is specific different as follows：
Step 1：P-phenylenediamine is added in an inert atmosphere in the middle of all higher boiling proton solvents, stirring is caused to diamines list
Body is completely dissolved, and adds maleic anhydride monomer afterwards, and described diamine monomer and dianhydride monomer mol ratio containing phenyl ring are 1:1,
Wherein described dianhydride monomer points of 5 times each equivalent within half an hour are added, the reaction 2 hours at a temperature of 80 DEG C of low temperature,
Polyamic acid solution is obtained, wherein polyamic acid mass concentration is 50%.
Step 2：Polyamic acid solution after step 1 is added into inorganic nano pore-forming substance, stirring.
Step 3：Material after step 2 is carried out into electrostatic spinning, wherein enhancing film is received, wherein spinning temperature is 60 DEG C,
The spinning time is 10 hours；
Step 4:Film after the completion of spinning carries out hot imidization, and carries out pore-forming, obtains described composite diaphragm.
Wherein, the higher boiling proton solvent is sub-phosphono triamine.
Inorganic nano pore-forming substance is titanium carbide.
Specific embodiment 3：It is that barrier film preparation method is different with the difference of embodiment 1, it is specific different as follows：
Step 1：Chloro- 1, the 2- phenylenediamines of 4- are added in the middle of all higher boiling proton solvents in an inert atmosphere, stirring is caused
Diamine monomer is completely dissolved, maleic anhydride monomer, described diamine monomer and dianhydride monomer mole containing phenyl ring are added afterwards
Than being 1:1, wherein described dianhydride monomer points of 4 times each equivalent within half an hour are added, at a temperature of 70 DEG C of low temperature instead
Answer 7 hours, obtain polyamic acid solution, wherein polyamic acid mass concentration is 30%.
Step 2：Polyamic acid solution after step 1 is added into inorganic nano pore-forming substance, stirring.
Step 3：Material after step 2 is carried out into electrostatic spinning, wherein enhancing film is received, wherein spinning temperature is 60 DEG C,
The spinning time is 7 hours；
Step 4:Film after the completion of spinning carries out hot imidization, and carries out pore-forming, obtains described composite diaphragm.
Wherein, the higher boiling proton solvent is sub-phosphono triamine.
Inorganic nano pore-forming substance is silicon nitride.
Specific embodiment 4：It is that barrier film preparation method is different with the difference of embodiment 1, it is specific different as follows：
Step 1：By 5- Trifluoromethyl-1s, 3- phenylenediamines are added in the middle of all higher boiling proton solvents in an inert atmosphere, are stirred
Mix so that be completely dissolved to diamine monomer, maleic anhydride monomer, described diamine monomer and dianhydride list containing phenyl ring are added afterwards
Body mol ratio is 1:1, wherein described dianhydride monomer point 4 each equivalent within half an hour are added, in 60 DEG C of temperature of low temperature
The lower reaction of degree 10 hours, obtains polyamic acid solution, and wherein polyamic acid mass concentration is 10%.
Step 2：Polyamic acid solution after step 1 is added into inorganic nano pore-forming substance, stirring.
Step 3：Material after step 2 is carried out into electrostatic spinning, wherein enhancing film is received, wherein spinning temperature is 60 DEG C,
The spinning time is 2 hours；
Step 4:Film after the completion of spinning carries out hot imidization, and carries out pore-forming, obtains described composite diaphragm.
Wherein, the higher boiling proton solvent is Hexaethyl Asia phosphoric triamide.
Inorganic nano pore-forming substance is cadmium sulfide.
Specific embodiment 5：It is that barrier film preparation method is different with the difference of embodiment 1, it is specific different as follows：
Step 1：Bromo- 1, the 2- phenylenediamines of 4- are added in the middle of all higher boiling proton solvents in an inert atmosphere, stirring is caused
Diamine monomer is completely dissolved, maleic anhydride monomer, described diamine monomer and dianhydride monomer mole containing phenyl ring are added afterwards
Than being 1:1, wherein described dianhydride monomer points of 5 times each equivalent within half an hour are added, at a temperature of 60 DEG C of low temperature instead
Answer 10 hours, obtain polyamic acid solution, wherein polyamic acid mass concentration is 10%.
Step 2：Polyamic acid solution after step 1 is added into inorganic nano pore-forming substance, stirring.
Step 3：Material after step 2 is carried out into electrostatic spinning, wherein enhancing film is received, wherein spinning temperature is 50 DEG C,
The spinning time is 7 hours；
Step 4:Film after the completion of spinning carries out hot imidization, and carries out pore-forming, obtains described composite diaphragm.
Wherein, the higher boiling proton solvent is Hexaethyl Asia phosphoric triamide.
Inorganic nano pore-forming substance is zinc oxide.
Specific embodiment 6：It is that barrier film preparation method is different with the difference of embodiment 1, it is specific different as follows：
Step 1：M-phenylene diamine (MPD) is added in an inert atmosphere in the middle of all higher boiling proton solvents, stirring is caused to diamines list
Body is completely dissolved, and adds maleic anhydride monomer afterwards, and described diamine monomer and dianhydride monomer mol ratio containing phenyl ring are 1:1,
Wherein described dianhydride monomer points of 3 times each equivalent within half an hour are added, the reaction 7 hours at a temperature of 70 DEG C of low temperature,
Polyamic acid solution is obtained, wherein polyamic acid mass concentration is 30%.
Step 2：Polyamic acid solution after step 1 is added into inorganic nano pore-forming substance, stirring.
Step 3：Material after step 2 is carried out into electrostatic spinning, wherein enhancing film is received, wherein spinning temperature is 30 DEG C,
The spinning time is 10 hours；
Step 4:Film after the completion of spinning carries out hot imidization, and carries out pore-forming, obtains described composite diaphragm.
Wherein, the higher boiling proton solvent is dimethylacetylamide.
Inorganic nano pore-forming substance is cadmium sulfide.
The performance detection of embodiment 1-6 is as follows：
Performance measurement to battery is as follows：
Claims (9)
1. a kind of lithium battery for new-energy automobile, it is characterised in that including positive plate（1）, negative plate（2）, positive plate position
In positive electrode（3）In, negative plate is located at negative material（4）In, described positive plate is connected with anode ear（101）, negative plate
Connection negative electrode lug（201）, barrier film is provided between both positive and negative polarity（7）.
2. the lithium battery for new-energy automobile according to claim 1, it is characterised in that described battery ambient shell
（5）, buffering heat dissipating layer is provided between described shell and battery（6）, described buffering heat dissipating layer is by poly- containing conductive particle
Urethane elasticity is constituted.
3. the lithium battery for new-energy automobile according to claim 2, it is characterised in that described conductive particle is gold
Particle, silver particles, copper particle, iron particle, one kind of aluminum particulate, quality accounting are 5%-50%.
4. the lithium battery for new-energy automobile according to claim 2, it is characterised in that described barrier film includes enhancing
Film and basement membrane, described basement membrane are the polyimide base film containing phenyl ring, and described enhancing film is non-woven membrane.
5. the lithium battery for new-energy automobile according to claim 4, it is characterised in that described basement membrane is by containing phenyl ring
Diamine monomer and dianhydride monomer raw material prepare.
6. the lithium battery for new-energy automobile according to claim 5, it is characterised in that the described diamines containing phenyl ring
Monomer is selected from 2- dimethyl-p-phenylenediamines, p-phenylenediamine, the chloro- 1,2- phenylenediamines of 4-, NPD, m-phenylene diamine (MPD), 5- tri-
The bromo- 1,2- phenylenediamines of methyl fluoride -1,3- phenylenediamines, 4-, 3- nitro -1,2- phenylenediamines.
7. the lithium battery for new-energy automobile according to claim 5, it is characterised in that the preparation method of barrier film is such as
Under：
Step 1：Diamine monomer containing phenyl ring is added in the middle of all higher boiling proton solvents in an inert atmosphere, stirring is caused
Diamine monomer is completely dissolved, dianhydride monomer is added afterwards, described diamine monomer and dianhydride monomer mol ratio containing phenyl ring are
1:1, wherein described dianhydride monomer point 2-5 each equivalent within half an hour is added, in 60 DEG C -80 DEG C of temperature of low temperature
Lower reaction 2-10 hours, obtains polyamic acid solution, and wherein polyamic acid mass concentration is 10%-50%;
Step 2：Polyamic acid solution after step 1 is added into inorganic nano pore-forming substance, stirring;
Step 3：Material after step 2 is carried out into electrostatic spinning, wherein enhancing film is received, wherein spinning temperature is 30 DEG C -60
DEG C, the spinning time is 2-10 hours；
Step 4:Film after the completion of spinning carries out hot imidization, and carries out pore-forming, obtains described composite diaphragm.
8. the lithium battery for new-energy automobile according to claim 7, it is characterised in that the higher boiling proton solvent
It is dimethylacetylamide, sub-phosphono triamine, one kind of Hexaethyl Asia phosphoric triamide.
9. the lithium battery of new-energy automobile is used for as claimed in claim 6, it is characterised in that inorganic nano pore-forming substance is carbon
Change boron, tungsten carbide, carborundum, titanium carbide, silicon nitride, titanium nitride, aluminium nitride, boron nitride, barium sulfate, cadmium sulfide, copper sulfide, sulphur
The mixture of one or more of sour calcium, zinc sulphide, zinc oxide, silica.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611125981.8A CN106784462A (en) | 2016-12-09 | 2016-12-09 | A kind of lithium battery for new-energy automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611125981.8A CN106784462A (en) | 2016-12-09 | 2016-12-09 | A kind of lithium battery for new-energy automobile |
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| JP2000108687A (en) * | 1998-10-08 | 2000-04-18 | Polymatech Co Ltd | Battery storage structure and method for electric vehicle |
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| CN102479978A (en) * | 2010-11-30 | 2012-05-30 | 上海比亚迪有限公司 | Pole core of lithium ion battery and lithium ion battery |
| CN103015033A (en) * | 2012-11-21 | 2013-04-03 | 华南理工大学 | Novel fluorine-contained polyimide (PI) nanofiber membrane, as well as preparation method and application thereof |
| CN203423236U (en) * | 2012-10-25 | 2014-02-05 | 三洋电机株式会社 | Battery pack |
| CN104752665A (en) * | 2015-03-31 | 2015-07-01 | 渤海大学 | Method for preparing polyimide porous nanofiber electrode diaphragm |
| CN104987506A (en) * | 2015-06-29 | 2015-10-21 | 桂林理工大学 | Soluble polyimide containing tert-butyl and benzofuran structure and preparation method of soluble polyimide |
-
2016
- 2016-12-09 CN CN201611125981.8A patent/CN106784462A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000108687A (en) * | 1998-10-08 | 2000-04-18 | Polymatech Co Ltd | Battery storage structure and method for electric vehicle |
| CN101044394A (en) * | 2005-03-31 | 2007-09-26 | 日立化成工业株式会社 | Method of estimating dissolution rate of polyimide, process for producing polyimide and polyimide obtained using the methods |
| CN102479978A (en) * | 2010-11-30 | 2012-05-30 | 上海比亚迪有限公司 | Pole core of lithium ion battery and lithium ion battery |
| CN203423236U (en) * | 2012-10-25 | 2014-02-05 | 三洋电机株式会社 | Battery pack |
| CN103015033A (en) * | 2012-11-21 | 2013-04-03 | 华南理工大学 | Novel fluorine-contained polyimide (PI) nanofiber membrane, as well as preparation method and application thereof |
| CN104752665A (en) * | 2015-03-31 | 2015-07-01 | 渤海大学 | Method for preparing polyimide porous nanofiber electrode diaphragm |
| CN104987506A (en) * | 2015-06-29 | 2015-10-21 | 桂林理工大学 | Soluble polyimide containing tert-butyl and benzofuran structure and preparation method of soluble polyimide |
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Application publication date: 20170531 |