CN105789527A - Preparing method of PET/PP porous cell diaphragm material - Google Patents
Preparing method of PET/PP porous cell diaphragm material Download PDFInfo
- Publication number
- CN105789527A CN105789527A CN201410812022.8A CN201410812022A CN105789527A CN 105789527 A CN105789527 A CN 105789527A CN 201410812022 A CN201410812022 A CN 201410812022A CN 105789527 A CN105789527 A CN 105789527A
- Authority
- CN
- China
- Prior art keywords
- fibre
- fiber
- fibers
- diaphragm material
- pet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
Landscapes
- Cell Separators (AREA)
Abstract
The invention relates to a preparing method of a PET/PP porous cell diaphragm material. The preparing method comprises following steps of selecting and using PET/PP dual-component composite fibers and single-component composite fibers; cutting the fibers into short fibers for stand-by by adopting a disc type fiber cutting machine; beating and defibering the cut short fibers, cellulosic fibers and inorganic fibers; preparing into high concentration fiber pulp in which water is taken as a dispersion medium and alkane sulfonate is taken as a dispersant; starching through a center pulp distributor; carrying out hydraulic single-screen double-layer inclined screen moulding; dehydrating; pressing; and drying to prepare the porous cell diaphragm material. The material has excellent performance and can be used as the cell diaphragm, capacitor diaphragm, high temperature insulation and high temperature filtering material after processing such as sulfonating, grafting, high temperature pressing and coating is carried out on the material.
Description
Technical field
The present invention relates to porous battery diaphragm material preparing technical field, particularly to the preparation method of a kind of PET/PP porous battery diaphragm material.
Background technology
Along with IT electronic industry, new-energy automobile, energy storage industry fast development, secondary power supply is just in vigorous growth trend.Battery diaphragm is as one of the critical material of secondary power supply, and it acts on ever more important, and therefore the manufacture of battery diaphragm material also causes people increasingly to pay attention to.
Current secondary battery membrane material preparation method mainly includes phase inversion, leaching, pulling method, fiber dry carding, fiber wet papermaking molding etc., wherein phase inversion, leaching, pulling method are mainly used to prepare lithium ion battery separator, this kind of battery diaphragm is two-dimensional structure, the defects such as temperature tolerance difference and thermal contraction is big, poor stability, porosity are low, electrolyte impregnability difference, also exist the defect of self in guaranteeing lithium ion battery security and service life.Dry carding molding is mainly used to prepare alkaline secondary cell diaphragm, there is fiber poor dispersion, skewness in this kind of battery diaphragm, the instructions for use of power type, high power capacity, high magnification alkaline battery cannot be met, easily cause the problem such as battery consistency difference, short circuit ratio height.Wet papermaking technology is adopted to produce porous battery diaphragm material, the extraordinary application requirement meeting alkaline battery, lithium ion battery, ultracapacitor, high-temperature insulation electronic component and high temperature filtration of diaphragm material that this kind of method produces, but due to problems such as material selections, although there being employing wet papermaking technology to produce porous battery diaphragm material at present, mostly it is adopt single net monolayer molding, then MULTILAYER COMPOSITE, or adopt double; two net two-layered, formed, the problems such as equipment investment, comprehensive production cost so can be caused higher.
Summary of the invention
Present invention aim to overcome that the deficiencies in the prior art, it is provided that a kind of technique is simple, reasonable, the preparation method of the porous battery diaphragm material of low cost.
A kind of preparation method of PET/PP porous battery diaphragm material:
(1) composite fibre and the one pack system synthetic fibers selecting fibre diameter to be 4 μm～8 μm, adopt disc type fibre cutting machine to be cut into the chopped fiber that length is 1mm～8mm standby；
(2) by the chopped fiber of well cutting and cellulose fibre, inorfil discongests process through making beating, prepares into concentration cellulose slurry, and with water for disperse medium, alkylsulfonate is dispersant；
(3) center pulp distributor hydraulic list net Double-layer oblique net forming is adopted；
(4), after dewatering press, dry in 100 DEG C～140 DEG C baking ovens and make porous battery diaphragm material.
Wherein said one pack system synthetic fibers are one or more in polypropylene fibre, polyester fiber, aramid fiber, polyimide fiber；Described cellulose fibre is nano-scale fiber cellulose fiber；Described inorfil is one or more in Zirconium oxide fibre, alumina fibre, magnesia fibers.
In mass fraction, wherein bicomponent composite fibre is 50%～100%；One pack system synthetic fibers are 20～100%；Cellulose fibre is 0～100%；Inorfil is 0～25%.
The porous battery diaphragm material obtained by above-mentioned preparation method, after the modes such as such as sulfonation process, grafting process, high temperature compacting and coating process process, it is possible to carry out extensive use as alkaline battery separator, lithium ion battery separator, diaphragm of supercapacitor, high-temperature insulation film and high-temperature-resistant filtering material.
Present invention have the advantage that
(1) porous battery diaphragm material prepared by the present invention is adopted, there is the chemical stability of excellence and very big specific surface area, because the fibrous material that the present invention adopts has bicomponent composite fibre, utilizing the low melting point part in fiber to carry out adhesion between fiber, in preparation process, adhesive-free adds.
(2) porous battery diaphragm material prepared by the present invention is adopted, it has uniform pore size distribution, and pore structure is three-dimensional netted, because the present invention adopts the advanced wet papermaking technology of single net Double-layer oblique net forming, again due to chopped fiber that fiber is through discongesting process, it is effectively guaranteed the uniformity dispersion of fiber, cross-distribution, it is effectively guaranteed uniformity and the tridimensional network in hole, and it is effectively increased the intensity of porous battery diaphragm material, this overcome the minimum living liquid rate preparing lithium ion battery separator at present, low porosity, the shortcoming that high short circuit ratio etc. are fatal, effectively raise safety and the cycle performance of lithium ion battery.
(3) porous battery diaphragm material prepared by the present invention is adopted, there is the resistance to elevated temperatures of excellence, this is because material of the present invention contains polyester component fiber, cellulose fibre or inorfil in constituting, these fibers have played skeletal support effect, battery diaphragm prepared by the porous battery diaphragm material therefore prepared is compared additive method and is had good resistance to elevated temperatures, has obvious advantage in ensureing the high temperature safe performance of battery.
Detailed description of the invention
Embodiment 1
(1) by PET/PP bicomponent composite fibre that fibre diameter is 3 μm and single component polyester fibers, disc type fibre cutting machine is adopted to be cut into the chopped fiber that length is 5mm.
(2) chopped fiber PET/PP composite fibre, polyester fiber and nano-cellulose fiber, alumina fibre prepared by step (1), with the absolute dry mass of fiber, it is carry out Homogeneous phase mixing at 40: 35: 10: 5 by mass fraction, process is discongested through high speed rotary-cut making beating, prepare into the fibre stuff that concentration is 2%, with water for disperse medium, dodecylbenzene sodium sulfonate is dispersant.
(3) fibre stuff step (2) prepared, by center pulp distributor equipressure starching, through hydrodynamic inclined-wire stock discharge box, carries out single net Double-layer oblique net forming.
(4), after dewatering press, dry in 140 DEG C of baking ovens, prepare into the porous lithium ion cell diaphragm matrix material that surface density is 13g/m2.
(5) prepared matrix material is first quickly suppressed through the high temperature of 200 DEG C, its thickness is adjusted to 22 μm, prepared material is coated by the nano aluminium oxide aqueous coating fluid then using mass concentration to be 25%, speed is 12m/min, coating layer thickness one side is 5 μm, after 90 DEG C dry, make lithium ion battery separator.
Claims (2)
1. the preparation method characteristic of a PET/PP porous battery diaphragm material is in that:
(1) composite fibre and the one pack system synthetic fibers selecting fibre diameter to be 4 μm～8 μm, adopt disc type fibre cutting machine to be cut into the chopped fiber that length is 1mm～8mm standby；
(2) by the chopped fiber of well cutting and cellulose fibre, inorfil discongests process through making beating, prepares into concentration cellulose slurry, and with water for disperse medium, alkylsulfonate is dispersant；
(3) center pulp distributor hydraulic list net Double-layer oblique net forming is adopted；
(4), after dewatering press, dry in 100 DEG C～140 DEG C baking ovens and make porous battery diaphragm material.
Wherein said one pack system synthetic fibers are one or more in polypropylene fibre, polyester fiber, aramid fiber, polyimide fiber；Described cellulose fibre is nano-scale fiber cellulose fiber；Described inorfil is one or more in Zirconium oxide fibre, alumina fibre, magnesia fibers.
In mass fraction, wherein bicomponent composite fibre is 50%～100%；One pack system synthetic fibers are 20～100%；Cellulose fibre is 0～100%；Inorfil is 0～25%.
The porous battery diaphragm material obtained by above-mentioned preparation method, after the modes such as such as sulfonation process, grafting process, high temperature compacting and coating process process, it is possible to as alkaline battery separator, lithium ion battery separator, diaphragm of supercapacitor, high-temperature insulation film and high-temperature-resistant filtering material.
2. the porous battery diaphragm material that preparation method as claimed in claim 1 obtains, after the modes such as such as sulfonation process, grafting process, high temperature compacting and coating process process, it is possible to as alkaline battery separator, lithium ion battery separator, diaphragm of supercapacitor, high-temperature insulation film and high-temperature-resistant filtering material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410812022.8A CN105789527A (en) | 2014-12-23 | 2014-12-23 | Preparing method of PET/PP porous cell diaphragm material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410812022.8A CN105789527A (en) | 2014-12-23 | 2014-12-23 | Preparing method of PET/PP porous cell diaphragm material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105789527A true CN105789527A (en) | 2016-07-20 |
Family
ID=56378039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410812022.8A Pending CN105789527A (en) | 2014-12-23 | 2014-12-23 | Preparing method of PET/PP porous cell diaphragm material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105789527A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337603A (en) * | 2013-07-16 | 2013-10-02 | 莱州联友金浩新型材料有限公司 | Porous battery diaphragm material and manufacturing method and application of porous battery diaphragm material |
-
2014
- 2014-12-23 CN CN201410812022.8A patent/CN105789527A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337603A (en) * | 2013-07-16 | 2013-10-02 | 莱州联友金浩新型材料有限公司 | Porous battery diaphragm material and manufacturing method and application of porous battery diaphragm material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103337603B (en) | Porous battery diaphragm material and manufacturing method and application of porous battery diaphragm material | |
| CN103100264B (en) | Battery and capacitor diaphragm filter material formed by wet nonwoven fabrics and preparation method of filter material | |
| CN102728144B (en) | Wet papermaking forming battery capacitor diaphragm filtering material and preparation method thereof | |
| CN104157815B (en) | A kind of Bacterial cellulose porous membrane and preparation method thereof | |
| CN105144431B (en) | Three area's battery separators | |
| CN104157812A (en) | Lithium ion battery diaphragm, preparation method of lithium ion battery diaphragm and lithium ion battery | |
| CN102522514B (en) | High-temperature resistant micropore thin film material and application thereof | |
| CN107004810B (en) | Battery separator with controlled pore structure | |
| CN105870383B (en) | A kind of battery capacitor barrier film and preparation method thereof | |
| CN106537537B (en) | Electrical storage device partition and the electrical storage device for using the partition | |
| CN104885257A (en) | Methods of making single-layer lithium ion battery separators having nanofiber and microfiber components | |
| CA2767204C (en) | Porous electrode substrate and method for producing the same | |
| CN105789536B (en) | A kind of melt-blown polyphenylene sulfide non-woven fabrics/aramid nano-fiber composite diaphragm preparation | |
| CN105355949A (en) | Preparation method of nanofiber composite proton exchange membrane | |
| CN103515562B (en) | A kind of novel lithium ion battery diaphragm and preparation method thereof | |
| CN112768839A (en) | Battery separator comprising inorganic particles | |
| CN110429227B (en) | Preparation method of fiber type lithium ion battery diaphragm | |
| CN101728504B (en) | Lithium ion battery diaphragm flexible substrate by wet papermaking and manufacturing method thereof | |
| CN104471765A (en) | Porous electrode substrate, method for manufacturing same, membrane-electrode assembly, and solid-polymer fuel cell | |
| CN105789526A (en) | Preparation method of PP/PE porous battery separator material | |
| CN107437630A (en) | A kind of lithium battery isolation membrane and its production and use | |
| CN104577011B (en) | A kind of battery diaphragm reinforcing material | |
| JP2015060686A (en) | Separator for molten salt battery | |
| CN103700800B (en) | A kind of lithium ion battery separator manufacture method | |
| CN105789528A (en) | Preparation method of PA/PP porous battery separator material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160720 |