CN105931859A - High performance capacitor membrane material with uniform character - Google Patents
High performance capacitor membrane material with uniform character Download PDFInfo
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- CN105931859A CN105931859A CN201610473273.7A CN201610473273A CN105931859A CN 105931859 A CN105931859 A CN 105931859A CN 201610473273 A CN201610473273 A CN 201610473273A CN 105931859 A CN105931859 A CN 105931859A
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- polyacrylonitrile
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/52—Separators
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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
- Y02E60/13—Energy storage using capacitors
Abstract
The invention discloses a high performance capacitor membrane material with uniform character. The high performance capacitor membrane material is prepared from the following raw materials in part by weight: 35-40 parts of polyvinyl alcohol fiber, 33-35 parts of polypropylene fiber, 10-13 parts of polyacrylonitrile powder, 30-32 parts of acetone, 72-75 parts of N,N- dimethyl formamide, 8-10 parts of water-soluble PVA fiber at 70 DEG C, 4-5 parts of tapioca starch, 2-3 parts of dimethicone, 2.5-3 parts of polyacrylamide, 0.8-1 part of dispersant NNO, 3-4 parts of methyl acrylate, 9-11 parts of gaseous phase aluminium oxide, and 1.5-2 parts of lignin. The gaseous phase aluminium oxide, the dispersant NNO and like components are added in the preparation process so as to improve the dispersibility of the powder in the product, the prepared membrane material is uniform and smooth, uniform in character, high in strength and tenacity; the prepared super-capacitor is long in service life, good in dielectric property and high in yield.
Description
Technical field
The present invention relates to capacitor diaphragm technical field, particularly relate to the high performance capacitors diaphragm material that a kind of quality is homogeneous.
Background technology
Ultracapacitor is the accumulator of a kind of great market competitiveness, owing to it can realize quick charge, heavy-current discharge, and has the charge lifetimes of more than 100,000 times, occupies critical role in some need the application of high-multiplying power discharge in short-term.The extensive of this Novel energy storage apparatus of ultracapacitor is paid attention in the requirement of electrical source of power also result in worldwide by hybrid vehicle and electric automobile.In the composition of ultracapacitor, electrode, electrolyte and diaphragm paper play conclusive impact to the performance of ultracapacitor.Electrode and the electrolyte of ultracapacitor is the focus studied at present, but people are the highest for research and the attention rate of barrier film.
The diaphragm paper of ultracapacitor is between two porous carbon electrodes, and complete wetting is in the electrolytic solution together with electrode, plays the effect of isolation during repeated charge, stops electronics conduction, prevents from contacting the internal short-circuit caused between the two poles of the earth.This just requires that diaphragm material is the insulator of electronics, has good isolation performance, and its hole should be as far as possible less than the minimum grain size of electrode active surface material.The necessary aperture of the preferable diaphragm paper of isolation performance is little, the circulation of electrolyte so can be made to decline, battery charging and discharging hydraulic performance decline；And electrolyte to be impregnated with rate higher, ion is the most more by the diaphragm material often hole that property is good, easily causes and contacts the internal short-circuit caused between the two poles of the earth.The maximum advantage of ultracapacitor be charge/discharge rates fast, can be with high power discharge, therefore, diaphragm material will thinner towards thickness, porosity is higher, aperture is less and the contour performance trend development that is more evenly distributed.
The material being currently used for diaphragm of supercapacitor mainly has cellulosic separator paper and conventional batteries barrier film, and High-performance diaphragm paper manufactures technical difficulty, and price is high；Conventional batteries membrane thicknesses is thicker, and porosity is low, poor to electrolyte affinity, and electrostatic spinning nano fiber film manufacturing technology is simple, low cost, and barrier film porosity is up to 90%, good to electrolyte affinity, but a disadvantage is that intensity is the highest.If cellulosic separator paper can be combined with electrospun fibers film, learning from other's strong points to offset one's weaknesses, low cost can be obtained, porosity is high, intensity is big composite diaphragm material.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that the high performance capacitors diaphragm material that a kind of quality is homogeneous.
The present invention is achieved by the following technical solutions:
The high performance capacitors diaphragm material that a kind of quality is homogeneous, it is prepared by the raw materials in: vinal 35-40, polypropylene fibre 33-35, polyacrylonitrile powder 10-13, acetone 30-32, DMF 72-75,70 DEG C of water-soluble PVA fiber 8-10, tapioca 4-5, dimethicone 2-3, polyacrylamide 2.5-3, dispersant NNO0.8-1, acrylic acid methyl ester. 3-4, gas phase aluminium sesquioxide 9-11, lignin 1.5-2.
According to the high performance capacitors diaphragm material that a kind of quality described in claims 1 is homogeneous, following concrete grammar it is prepared from:
(1) by acetone and N, dinethylformamide mix homogeneously at normal temperatures, add polyacrylonitrile powder, 3 hours are stirred at normal temperatures with the speed of 100 revs/min, form polyacrylonitrile spinning solution, receiving range be 20cm, voltage be 25kV, feed flow speed be 1mL/h under conditions of carry out electrostatic spinning 2 hours, spin out the polyacrylonitrile nanofiber film that thickness is 10 μm stand-by；
(2) polypropylene fibre is mixed with vinal, add appropriate water, put in beater, carry out being dispersed into fibrous suspension by 2% concentration, add 70 DEG C of water-soluble PVA fibers, be heated to 70 DEG C while stirring with the speed of 1000 revs/min, until 70 DEG C of water-soluble PVA fibers to be completely dissolved formation mixing suspension stand-by；
(3) acrylic acid methyl ester., gas phase aluminium sesquioxide are put in high-speed mixer; it is heated to 80 DEG C; lignin, dispersant NNO is added with the speed of 1000 revs/min after stirring 15 minutes; send into after continuing stirring 10 minutes in comminutor; with the temperature extruding pelletization of 130 DEG C; pulverize after granule is cooled down, cross 600 mesh sieves, obtain reinforcer；
(4) mixing suspension that will obtain in step (2) adds reinforcer, polyacrylamide emulsion and remaining residual components that step (3) obtains, continuously add appropriate water, stir 30 minutes with the speed of 600 revs/min, forming online concentration is the slurry of 0.1wt%, use wet therapy forming process that above-mentioned slurry is sent into paper machine through wet end and press section drainage and formation, then electricity consumption hot blast is dried 10 minutes, then it is stand-by to use hot forming machine to obtain non-weaving cloth base fabric with the temperature heat pressure adhesive of 135 DEG C；
(5) polyacrylonitrile nanofiber film step (1) obtained covers on the non-weaving cloth base fabric that step (4) obtains, and carries out hot binding by the hot-rollings of 135 DEG C, shears, is packaged to be the present invention after cooling.
The invention have the advantage that first polyacrylonitrile is carried out electrostatic spinning and make polyacrylonitrile nanofiber film by the present invention, then vinal is utilized to mix with polypropylene fibre, wet nonwoven fabrics technique is used to make non-weaving cloth, both are well bonded together by the way of hot pressing, intensity height, the performance of good permeability can be obtained, and preferably control aperture and the distribution of diaphragm material, aperture less is more evenly distributed, porosity high, it is thus possible to be preferably impregnated with electrolyte so that discharge current is evenly；70 DEG C of water-soluble PVA fibers of interpolation are as reinforcing agent simultaneously, and the composite diaphragm material made also has preferable tensile strength, chemical stability, and fluidity and isolation performance are protected in imbibition.
The present invention also with the addition of the composition such as gas phase aluminium sesquioxide, dispersant NNO in preparation process, improve powder body dispersibility in the product, the diaphragm material uniform smooth prepared can be made, quality is homogeneous, intensity and toughness are high, the ultracapacitor made is long for service life, and dielectric properties are good, and yield rate is high.
Detailed description of the invention
The high performance capacitors diaphragm material that a kind of quality is homogeneous, it is made up of the raw material of following weight portion (kilogram): vinal 35, polypropylene fibre 33, polyacrylonitrile powder 10, acetone 30, DMF 72,70 DEG C of water-soluble PVA fibers 8, tapioca 4, dimethicone 2, polyacrylamide 2.5, dispersant NNO0.8, acrylic acid methyl ester. 3, gas phase aluminium sesquioxide 9, lignins 1.5.
According to the high performance capacitors diaphragm material that a kind of quality described in claims 1 is homogeneous, following concrete grammar it is prepared from:
(1) by acetone and N, N-dimethylformamide mix homogeneously at normal temperatures, add polyacrylonitrile powder, 3 hours are stirred at normal temperatures with the speed of 100 revs/min, form polyacrylonitrile spinning solution, receiving range be 20cm, voltage be 25kV, feed flow speed be 1mL/h under conditions of carry out electrostatic spinning 2 hours, spin out the polyacrylonitrile nanofiber film that thickness is 10 μm stand-by；
(2) polypropylene fibre is mixed with vinal, add appropriate water, put in beater, carry out being dispersed into fibrous suspension by 2% concentration, add 70 DEG C of water-soluble PVA fibers, be heated to 70 DEG C while stirring with the speed of 1000 revs/min, until 70 DEG C of water-soluble PVA fibers to be completely dissolved formation mixing suspension stand-by；
(3) acrylic acid methyl ester., gas phase aluminium sesquioxide are put in high-speed mixer; it is heated to 80 DEG C; lignin, dispersant NNO is added with the speed of 1000 revs/min after stirring 15 minutes; send into after continuing stirring 10 minutes in comminutor; with the temperature extruding pelletization of 130 DEG C; pulverize after granule is cooled down, cross 600 mesh sieves, obtain reinforcer；
(4) mixing suspension that will obtain in step (2) adds reinforcer, polyacrylamide emulsion and remaining residual components that step (3) obtains, continuously add appropriate water, stir 30 minutes with the speed of 600 revs/min, forming online concentration is the slurry of 0.1wt%, use wet therapy forming process that above-mentioned slurry is sent into paper machine through wet end and press section drainage and formation, then electricity consumption hot blast is dried 10 minutes, then it is stand-by to use hot forming machine to obtain non-weaving cloth base fabric with the temperature heat pressure adhesive of 135 DEG C；
(5) polyacrylonitrile nanofiber film step (1) obtained covers on the non-weaving cloth base fabric that step (4) obtains, and carries out hot binding by the hot-rollings of 135 DEG C, shears, is packaged to be the present invention after cooling.
By testing the present embodiment diaphragm material, thickness is 65 μm, and average pore size is 0.28 μm, and porosity is 70%, and pick up is 615%, and at 110 DEG C, percent thermal shrinkage is less than 1%, and at 150 DEG C, percent thermal shrinkage is less than 1%.
Claims (2)
1. the high performance capacitors diaphragm material that a quality is homogeneous, it is characterized in that, it is prepared by the raw materials in: vinal 35-40, polypropylene fibre 33-35, polyacrylonitrile powder 10-13, acetone 30-32, DMF 72-75,70 DEG C of water-soluble PVA fiber 8-10, tapioca 4-5, dimethicone 2-3, polyacrylamide 2.5-3, dispersant NNO0.8-1, acrylic acid methyl ester. 3-4, gas phase aluminium sesquioxide 9-11, lignin 1.5-2.
2. according to the high performance capacitors diaphragm material that a kind of quality described in claims 1 is homogeneous, it is characterised in that be prepared from by following concrete grammar:
(1) by acetone and N, dinethylformamide mix homogeneously at normal temperatures, add polyacrylonitrile powder, 3 hours are stirred at normal temperatures with the speed of 100 revs/min, form polyacrylonitrile spinning solution, receiving range be 20cm, voltage be 25kV, feed flow speed be 1mL/h under conditions of carry out electrostatic spinning 2 hours, spin out the polyacrylonitrile nanofiber film that thickness is 10 μm stand-by；
(2) polypropylene fibre is mixed with vinal, add appropriate water, put in beater, carry out being dispersed into fibrous suspension by 2% concentration, add 70 DEG C of water-soluble PVA fibers, be heated to 70 DEG C while stirring with the speed of 1000 revs/min, until 70 DEG C of water-soluble PVA fibers to be completely dissolved formation mixing suspension stand-by；
(3) acrylic acid methyl ester., gas phase aluminium sesquioxide are put in high-speed mixer; it is heated to 80 DEG C; lignin, dispersant NNO is added with the speed of 1000 revs/min after stirring 15 minutes; send into after continuing stirring 10 minutes in comminutor; with the temperature extruding pelletization of 130 DEG C; pulverize after granule is cooled down, cross 600 mesh sieves, obtain reinforcer；
(4) mixing suspension that will obtain in step (2) adds reinforcer, polyacrylamide emulsion and remaining residual components that step (3) obtains, continuously add appropriate water, stir 30 minutes with the speed of 600 revs/min, forming online concentration is the slurry of 0.1wt%, use wet therapy forming process that above-mentioned slurry is sent into paper machine through wet end and press section drainage and formation, then electricity consumption hot blast is dried 10 minutes, then it is stand-by to use hot forming machine to obtain non-weaving cloth base fabric with the temperature heat pressure adhesive of 135 DEG C；
(5) polyacrylonitrile nanofiber film step (1) obtained covers on the non-weaving cloth base fabric that step (4) obtains, and carries out hot binding by the hot-rollings of 135 DEG C, shears, is packaged to be the present invention after cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610473273.7A CN105931859A (en) | 2016-06-24 | 2016-06-24 | High performance capacitor membrane material with uniform character |
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| CN201610473273.7A CN105931859A (en) | 2016-06-24 | 2016-06-24 | High performance capacitor membrane material with uniform character |
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| CN105931859A true CN105931859A (en) | 2016-09-07 |
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| CN201610473273.7A Pending CN105931859A (en) | 2016-06-24 | 2016-06-24 | High performance capacitor membrane material with uniform character |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110246704A (en) * | 2019-05-06 | 2019-09-17 | 铜陵市启动电子制造有限责任公司 | A kind of low-shrinkage capacitor diaphragm and preparation method thereof |
| CN112981717A (en) * | 2021-02-05 | 2021-06-18 | 广州金立电子有限公司 | Capacitor diaphragm and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832367A (en) * | 2012-08-31 | 2012-12-19 | 浙江大东南包装股份有限公司 | Diaphragm of lithium ion secondary battery, and method for preparing such diaphragm |
| CN103100264A (en) * | 2013-02-06 | 2013-05-15 | 吕凯 | Battery and capacitor diaphragm filter material formed by wet nonwoven fabrics and preparation method of filter material |
| CN104766938A (en) * | 2015-02-10 | 2015-07-08 | 龙岩紫荆创新研究院 | Composite lithium ion battery diaphragm and preparation method thereof |
| CN104766937A (en) * | 2015-02-10 | 2015-07-08 | 龙岩紫荆创新研究院 | Environment friendly battery diaphragm and preparation method thereof |
-
2016
- 2016-06-24 CN CN201610473273.7A patent/CN105931859A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832367A (en) * | 2012-08-31 | 2012-12-19 | 浙江大东南包装股份有限公司 | Diaphragm of lithium ion secondary battery, and method for preparing such diaphragm |
| CN103100264A (en) * | 2013-02-06 | 2013-05-15 | 吕凯 | Battery and capacitor diaphragm filter material formed by wet nonwoven fabrics and preparation method of filter material |
| CN104766938A (en) * | 2015-02-10 | 2015-07-08 | 龙岩紫荆创新研究院 | Composite lithium ion battery diaphragm and preparation method thereof |
| CN104766937A (en) * | 2015-02-10 | 2015-07-08 | 龙岩紫荆创新研究院 | Environment friendly battery diaphragm and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110246704A (en) * | 2019-05-06 | 2019-09-17 | 铜陵市启动电子制造有限责任公司 | A kind of low-shrinkage capacitor diaphragm and preparation method thereof |
| CN110246704B (en) * | 2019-05-06 | 2021-09-21 | 铜陵市启动电子制造有限责任公司 | Low-shrinkage capacitor diaphragm and preparation method thereof |
| CN112981717A (en) * | 2021-02-05 | 2021-06-18 | 广州金立电子有限公司 | Capacitor diaphragm and preparation method thereof |
| CN112981717B (en) * | 2021-02-05 | 2022-04-05 | 广州金立电子有限公司 | Capacitor diaphragm and preparation method thereof |
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Application publication date: 20160907 |
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