CN102856522B - High temperature-resistant cellulose fiber base material-containing lithium ion battery diaphragm and preparation method of the same - Google Patents
High temperature-resistant cellulose fiber base material-containing lithium ion battery diaphragm and preparation method of the same Download PDFInfo
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- CN102856522B CN102856522B CN201210380076.2A CN201210380076A CN102856522B CN 102856522 B CN102856522 B CN 102856522B CN 201210380076 A CN201210380076 A CN 201210380076A CN 102856522 B CN102856522 B CN 102856522B
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Abstract
The invention discloses a high temperature-resistant cellulose fiber base material-containing lithium ion battery diaphragm and a preparation method of the same. The battery diaphragm is characterized in that the thickness is 20-40 micrometers, the poriness is 40-60%, the gas permeability is 15-30sec/100cc; and the diaphragm comprises the cellulose fiber base material, a porous bonding layer and an inorganic coating layer. The preparation method comprises the following steps of: mechanically foaming the waterborne polyurethane emulsion, conveying the foam glue to a foam bath device, dragging and immersing the cellulose fiber base material in the foam bath for gluing, and forming the porous bonding layer on the surface of the base material by the foam glue; spreading an inorganic coating on the surfaces of the cellulose fiber base material and the porous bonding layer to form the inorganic coating layer compositely; and drying. The battery diaphragm provided by the invention has better solution absorption and solution preserving capability to the electrolyte; the battery diaphragm cannot shrink, and the hot-shrinkage rates in longitudinal direction and transverse direction both are less than 2%; and the battery diaphragm is relatively high in ion penetrability, relatively lower in resistance, excellent in mechanical performance and steady in electrochemical performance, and can prevent battery short circuit and dendritic crystal diapirism.
Description
Technical field
Lithium ion battery barrier film that the present invention relates to a kind of high temperature-resistant cellulose fiber base material and preparation method thereof, belongs to technical field of lithium ion.
Background technology
At present, lithium ion battery separator material is mainly polyalkene diaphragm as single-layer polypropylene (PP) microporous barrier, monolayer polyethylene (PE) microporous barrier and three layers of PP/PE/PP composite membrane, and such barrier film preparation method is mainly dry method tension pore method and wet method phase separation method.Polyalkene diaphragm drawback is: easily shrink when one, polyalkene diaphragm is heated, and diaphragm size can be caused unstable, and both positive and negative polarity directly contacts and short circuit; Two, closed pore temperature and broken film temperature lower, when battery occurring and the situation such as piercing through, a large amount of heat release of inside battery, causes barrier film to melt contraction completely, and battery short circuit produces high temperature until battery disintegrates or blast.These drawbacks determined by polyolefine material self-characteristic, and PE fusing point is 128 ~ 135 DEG C, and PP fusing point is 150 ~ 166 DEG C.
The publication number that Evonik Degussa Corp. of Germany applies for is the patent of invention of CN 100397681C, CN 1679183A and CN 101425570A etc., the openly preparation method of flexible ceramic lithium electric separator, this barrier film take nonwoven fabrics as base material, take aluminium oxide as the inorganic coating of main component, utilize the technology such as the transfer of roller coat, film or recessed roller printing to be coated with non-woven fabrics base material, obtain resistant to elevated temperatures ceramic lithium electric separator.But this barrier film easy dry linting in vibration, curling, folding process, barrier film consistency is poor.The publication number of Xiamen University's application is the patent of invention of CN 1312789C, with Celgard 2400 for base material, and Nano-meter SiO_2
2, polyoxyethylene, acetonitrile mixed solution be the coating of barrier film coating, prepare composite lithium battery membrane, but this barrier film adopt base material need import, production cost can be caused to increase.
Summary of the invention
Technical problem to be solved by this invention is that high temp resistance lithium ion cell barrier film prepared by the base material adopting cellulose fibre to manufacture paper with pulp, and not only consistency is good to require this barrier film, and production cost is low; Another object of the present invention is to provide a kind of preparation method adopting the high temp resistance lithium ion cell barrier film of above-mentioned base material.
In order to achieve the above object, the invention provides a kind of lithium ion battery barrier film of high temperature-resistant cellulose fiber base material, it is characterized in that, its thickness is 20 ~ 40 μm, porosity is 40 ~ 60%, air permeability is 15 ~ 30sec/100cc, and this barrier film comprises cellulose fiber base material, porous adhesive layer and inorganic coating.
Preferably, described cellulose fiber base material to be manufactured paper with pulp by wet papermaking machine by native cellulose fibre and/or regenerated celulose fibre and is formed, and its thickness is 15 ~ 35 μm, and porosity is 60 ~ 80%, and air permeability is 8 ~ 22sec/100cc.
Further, described native cellulose fibre is at least one in cotton fiber, bamboo fibre, ramee and flax fiber.
Further, described regenerated celulose fibre is at least one in tencel fiber, viscose rayon, CUP and acetate fiber.
Further, described native cellulose fibre and described regenerated celulose fibre, before manufacturing paper with pulp, make single fiber wire-dividing broom purification through making beating.
Further, the native cellulose fibre after described making beating and the average diameter of regenerated celulose fibre are 0.5 ~ 2 μm, and draw ratio is 50 ~ 200.
Further, described viscose rayon is discongested through hydraulic pulping and high frequency and fibre bundle is dispersed into single fiber.
Further, the fineness of described viscose rayon is 0.5D, and average length is 2mm.
Present invention also offers the preparation method of the lithium ion battery barrier film of above-mentioned high temperature-resistant cellulose fiber base material, it is characterized in that, concrete steps are as follows:
The first step: the aqueous polyurethane emulsion mechanical foaming by solid content being 38wt%, blowing ratio is 1: 8, foamed glue is delivered to bubble bath device, and cellulose fiber base material immerses bubble bath applying glue by traction, after infrared or airflow drying, foamed glue forms porous adhesive layer at substrate surface; The thickness of this porous adhesive layer is 1 μm, and average pore size is 2 μm;
Second step: inorganic coating is coated cellulose fiber base material and porous adhesive layer surface recombination formation inorganic coating;
3rd step: the composite material obtained by second step, after infrared radiation or airflow drying, obtains high temp resistance lithium ion cell barrier film.
Preferably, the preparation method of described inorganic coating is: be dissolved in by adhesive in solvent, then inorganic particle and adhesion promoter is added, adopt extra-high-pressure nano homogenizer homogenizing, wherein, weight of solvent is 1.5 ~ 2 times of inorganic particle weight, and adhesive weight is 2 ~ 5% of inorganic particle weight, and adhesion promoter weight is 0.1 ~ 0.5% of inorganic particle weight.
Further, described inorganic particle is one or more in alundum (Al2O3), silicon dioxide, zirconium dioxide.
Further, the particle size distribution range of described inorganic particle is D
10: 1 ~ 1.5 μm, D
50: 2 ~ 2.5 μm, D
97: 3 ~ 3.5 μm.
Further, described adhesive is one or more in Kynoar (PVDF), polyimides (PI), polyether sulfone (PES).
Further, described adhesion promoter is one or more in vinyltriethoxysilane, methyl triethoxysilane, vinyl three (2-methoxy ethoxy) silane.
Further, described solvent is the one in DMF (DMF) or 1-METHYLPYRROLIDONE (NMP).
Further, the solution temperature of described adhesive in described solvent is 50 DEG C.
Described extra-high-pressure nano homogenizer in the present invention is different from convention stir device, it is not rely on mechanical agitation by inorganic particle dispersion, but directly act on inorganic coating by high-pressure energy, produce the shearing force of high strength, impulsive force and impact force therein, its energy applied can more effectively act on solid particle, thus can by excessive Particle Breakage, and by the even particulate dispersion in inorganic coating.Extra-high-pressure nano homogenizer pressure of the present invention is preferably 100MPa, by above-mentioned inorganic coating homogenizing 0.5h, observed by laser particle size analyzer, in coating, the domain size distribution of inorganic particle is close to its primary domain size distribution, illustrates that extra-high-pressure nano homogenizer is to the dispersion of inorganic coating, homogenizing excellent performance.
In inorganic coating, the particle size distribution range of inorganic particle requires comparatively strict, rational particle size distribution range is selected to contribute to improving gas permeability and the porosity of inorganic coating, and the clear opening blocked in cellulose fiber base material, avoid battery short circuit phenomenon occurs, improve battery safety.Have high temperature resistant, anti-oxidant and insulation property containing alundum (Al2O3), silicon dioxide and zirconium dioxide inorganic particle in inorganic coating, the main component Kynoar of adhesive, polyimides and polyether sulfone all have good gumminess, resistance to chemical corrosion, high voltage withstanding performance and insulation property.In inorganic coating, inorganic particle is fixed on cellulose fiber base material and described porous adhesive layer by adhesive, and adhesion promoter contributes to increasing the adhesion property between inorganic particle and base material and porous adhesive layer.
Compared with existing technology, advantage of the present invention is:
One, high temp resistance lithium ion cell barrier film provided by the present invention all has excellent wettability energy because of its cellulosic substrates and inorganic coating, compared with polyalkene diaphragm, has better imbibition and liquid-keeping property to electrolyte.
Two, high temp resistance lithium ion cell barrier film provided by the present invention has porous adhesive layer, produces with Evonik Degussa Corp.
ceramic diaphragm is compared, and the adhesion of inorganic coating and base material increases, and membrane surface can not dry linting.This porous adhesive layer adopts foam gluing mode, forms the adhesive layer that pore-size distribution is homogeneous, percent opening is high, can not affect ion penetration at substrate surface.
Three, the present invention adopts extra-high-pressure nano homogenizer to carry out the process of dispersion homogenizing to inorganic coating, reduces between inorganic particle and reunites, make grain diameter close to primary particle diameter, is conducive to the precision coating of inorganic coating and improves membrane surface planarization.
Four, high temp resistance lithium ion cell barrier film provided by the present invention is compared with polyalkene diaphragm, and resistance to elevated temperatures significantly improves.PE and PP microporous barrier is significant shrinkage 180 DEG C time, and melts gradually, and barrier film of the present invention can not shrink at such a temperature, in length and breadth to percent thermal shrinkage all below 2%.
Five, high temp resistance lithium ion cell barrier film porosity provided by the present invention is high, and aperture is little, has higher ion penetration, comparatively low resistance and stable electrochemical property, also has excellent mechanical performance, can effectively prevent battery short circuit and dendrite from piercing through.
Accompanying drawing explanation
Fig. 1 is by the surperficial SEM scintigram of cellulose fiber base material;
Fig. 2 is the surperficial SEM scintigram of high temp resistance lithium ion cell barrier film.
Embodiment
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.Aqueous polyurethane emulsion model in embodiment 1 ~ 5 is
u4188, solid content is 38wt%, and BASF Aktiengesellschaft produces.
Embodiment 1
One, inorganic coating preparation
3g Kynoar, 0.5g polyimides added in 150gN-methyl pyrrolidone and add thermal agitation, temperature is 50 DEG C, and mixing time is 2h.0.5g methyl triethoxysilane and 100g alundum (Al2O3) (particle size distribution range: D is added in said mixture
10: 1.5 μm, D
50: 2.5 μm, D
97: 3.5 μm), homogenizing 0.5h under employing extra-high-pressure nano homogenizer 100MPa, until particle is dispersed in coating completely, namely prepares inorganic coating.
Two, high temp resistance lithium ion cell barrier film preparation
Barrier film base material adopts the tencel fiber of 90% and the cotton fiber (tencel fiber and cotton fiber average diameter are 2 μm, and draw ratio is 100) of 10% jointly to manufacture paper with pulp, and thickness is 15 μm, and porosity is 80%, and air permeability is 8sec/100cc.Wherein, cotton fiber and tencel fiber need make single fiber wire-dividing broom purification through making beating, and the cotton fiber after making beating and the average diameter of tencel fiber are 2 μm, and draw ratio is 50.The preparation method of porous adhesive layer is: the aqueous polyurethane emulsion mechanical foaming by solid content being 38wt%, blowing ratio is 1: 8, foamed glue is delivered to bubble bath device, base material immerses bubble bath applying glue by traction, after infrared or airflow drying, foamed glue forms porous adhesive layer at substrate surface, and its thickness and average pore size are respectively 1 μm, 2 μm.
Adopt recessed roller printing coating method above-mentioned inorganic coating to be coated on base material and porous adhesive layer two sides, after airflow drying, namely prepare high temp resistance lithium ion cell barrier film.The quantitative 25g/m of this barrier film
2, thickness is 20 μm, and porosity is 60%, and air permeability is 15sec/100cc, and average pore size is 220nm.
Embodiment 2
One, inorganic coating preparation
2.5g Kynoar, 0.5g polyimides and 0.5g polyether sulfone are added in 150gN-methyl pyrrolidone and add thermal agitation, temperature is 50 DEG C, and mixing time is 2h.0.3g methyl triethoxysilane, 0.2g vinyltriethoxysilane and 100g alundum (Al2O3) (particle size distribution range: D is added in said mixture
10: 1 μm, D
50: 2 μm, D
97: 3 μm), homogenizing 0.5h under employing extra-high-pressure nano homogenizer 100MPa, until particle is dispersed in coating completely, namely prepares inorganic coating.
Two, high temp resistance lithium ion cell barrier film preparation
Barrier film base material adopt the tencel fiber of 80%, the viscose rayon of 10% and 10% bamboo fibre (tencel fiber and bamboo fibre average diameter are 0.5 μm, draw ratio is 200, viscose rayon fineness is 0.5D, average length is 2mm) jointly manufacture paper with pulp, thickness is 20 μm, porosity is 70%, and air permeability is 15sec/100cc.Viscose rayon is discongested through hydraulic pulping and high frequency and fibre bundle is dispersed into single fiber, and its fineness is 0.5D, and average length is 2mm.Bamboo fibre and tencel fiber need make single fiber wire-dividing broom purification through making beating, and the bamboo fibre after making beating and the average diameter of tencel fiber are 0.5 μm, and draw ratio is 200.The preparation method of porous adhesive layer is: the aqueous polyurethane emulsion mechanical foaming by solid content being 38wt%, blowing ratio is 1: 8, foamed glue is delivered to bubble bath device, base material immerses bubble bath applying glue by traction, after infrared or airflow drying, foamed glue forms porous adhesive layer at substrate surface, and its thickness and average pore size are respectively 1 μm, 2 μm.
Adopt recessed roller printing coating method above-mentioned inorganic coating to be coated on base material and porous adhesive layer two sides, after airflow drying, namely prepare high temp resistance lithium ion cell barrier film.The quantitative 28g/m of this barrier film
2, thickness is 25 μm, and porosity is 50%, and air permeability is 20sec/100cc, and average pore size is 200nm.
Embodiment 3
One, inorganic coating preparation
3.0g Kynoar, 1.5g polyimides and 0.5g polyether sulfone are added in 150gN-methyl pyrrolidone and add thermal agitation, temperature is 50 DEG C, and mixing time is 2h.0.3g methyl triethoxysilane, 0.2g vinyl three (2-methoxy ethoxy) silane and 100g alundum (Al2O3) (particle size distribution range: D is added in said mixture
10: 1 μm, D
50: 2 μm, D
97: 3 μm), homogenizing 0.5h under employing extra-high-pressure nano homogenizer 100MPa, until particle is dispersed in coating completely, namely prepares inorganic coating.
Two, high temp resistance lithium ion cell barrier film preparation
Barrier film base material adopts the tencel fiber of 90%, the viscose rayon of 5%, (tencel fiber, ramee and flax fiber average diameter are 1.0 μm for the ramee of 2.5% and the flax fiber of 2.5%, draw ratio is 50, viscose rayon fineness is 0.5D, average length is 2mm) jointly manufacture paper with pulp, thickness is 18 μm, and porosity is 70%, and air permeability is 18sec/100cc.The preparation method of porous adhesive layer is: the aqueous polyurethane emulsion mechanical foaming by solid content being 38wt%, blowing ratio is 1: 8, foamed glue is delivered to bubble bath device, base material immerses bubble bath applying glue by traction, after infrared or airflow drying, foamed glue forms porous adhesive layer at substrate surface, and its thickness and average pore size are respectively 1 μm, 2 μm.
Adopt recessed roller printing coating method above-mentioned inorganic coating to be coated on base material and porous adhesive layer two sides, after airflow drying, namely prepare high temp resistance lithium ion cell barrier film.The quantitative 30g/m of this barrier film
2, thickness is 23 μm, and porosity is 45%, and air permeability is 25sec/100cc, and average pore size is 200nm.
Embodiment 4
One, inorganic coating preparation
Added in 150gN-methyl pyrrolidone by 2.0g Kynoar and add thermal agitation, temperature is 50 DEG C, and mixing time is 2h.0.3g methyl triethoxysilane, 0.2g vinyl three (2-methoxy ethoxy) silane and 100g alundum (Al2O3) (particle size distribution range: D is added in said mixture
10: 1 μm, D
50: 2 μm, D
97: 3 μm), 0.5h under employing extra-high-pressure nano homogenizer homogenizing 100MPa, until particle is dispersed in coating completely, namely prepares inorganic coating.
Two, high temp resistance lithium ion cell barrier film preparation
Barrier film base material adopt the tencel fiber of 90%, the viscose rayon of 5% and 5% bamboo fibre (tencel fiber and bamboo fibre average diameter are 1.5 μm, draw ratio is 100, viscose rayon fineness is 0.5D, average length is 2mm) jointly manufacture paper with pulp, thickness is 30 μm, porosity is 70%, and air permeability is 20sec/100cc.The preparation method of porous adhesive layer is: the aqueous polyurethane emulsion mechanical foaming by solid content being 38wt%, blowing ratio is 1: 8, foamed glue is delivered to bubble bath device, base material immerses bubble bath applying glue by traction, after infrared or airflow drying, foamed glue forms porous adhesive layer at substrate surface, and its thickness and average pore size are respectively 1 μm, 2 μm.
Adopt recessed roller printing coating method above-mentioned inorganic coating to be coated on base material and porous adhesive layer two sides, after airflow drying, namely prepare high temp resistance lithium ion cell barrier film.The quantitative 32g/m of this barrier film
2, thickness is 35 μm, and porosity is 48%, and air permeability is 26sec/100cc, and average pore size is 190nm.
Embodiment 5
One, inorganic coating preparation
Added in 200gN-methyl pyrrolidone by 3.0g Kynoar and add thermal agitation, temperature is 50 DEG C, and mixing time is 2h.0.1g methyl triethoxysilane and 100g alundum (Al2O3) (particle size distribution range: D is added in said mixture
10: 1 μm, D
50: 2.2 μm, D
97: 3 μm), 0.5h under employing extra-high-pressure nano homogenizer homogenizing 100MPa, until particle is dispersed in coating completely, namely prepares inorganic coating.
Two, high temp resistance lithium ion cell barrier film preparation
Barrier film base material adopt 90% tencel fiber, 10% viscose rayon (tencel fiber average diameter is 1.5 μm, and draw ratio is 200, and viscose rayon fineness is 0.5D, average length is 2mm) jointly manufacture paper with pulp, thickness is 35 μm, and porosity is 60%, and air permeability is 22sec/100cc.The preparation method of porous adhesive layer is: the aqueous polyurethane emulsion mechanical foaming by solid content being 38wt%, blowing ratio is 1: 8, foamed glue is delivered to bubble bath device, base material immerses bubble bath applying glue by traction, after infrared or airflow drying, foamed glue forms porous adhesive layer at substrate surface, and its thickness and average pore size are respectively 1 μm, 2 μm.
Adopt recessed roller printing coating method above-mentioned inorganic coating to be coated on base material and porous adhesive layer two sides, after airflow drying, namely prepare high temp resistance lithium ion cell barrier film.The quantitative 35g/m of this barrier film
2, thickness is 40 μm, and porosity is 40%, and air permeability is 15sec/100cc, and average pore size is 180nm.
Barrier film base material and inorganic coating adhesion property detect:
The adhesion property examination criteria of lithium ion battery separator base material prepared by embodiment 1 ~ 5 and inorganic coating adopts the mensuration (rod wax method) of GB/T22837-2008 paper and paperboard surface strength, and experimental result is in table 1:
The adhesion property test experience result of table 1 base material and inorganic coating
| Barrier film sample | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Certain ceramic diaphragm external |
| Rod wax level number | 14A | 16A | 16A | 14A | 16A | 10A |
Note: rod wax level number is higher, and adhesion is stronger.
Barrier film absorbent detects:
Lithium ion battery separator prepared by embodiment 1 ~ 5 and Celgard2400 barrier film soak respectively and take out after 2h in the electrolytic solution, weigh after being blotted by the electrolyte of membrane surface with blotting paper, and weight change before and after soaking according to barrier film, calculates the pick up of barrier film.The results are shown in Table 2:
Table 2 lithium ion battery separator pick up
| Barrier film sample | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Celgard2400 |
| Pick up (%) | 110.1 | 128.3 | 115.6 | 137.2 | 122.1 | 60.1 |
Barrier film resistance to elevated temperatures detects:
Lithium ion battery separator prepared by embodiment 1 ~ 5 and Celgard2400 heat 6h at 180 DEG C, according to barrier film vertical and horizontal change in size before and after heating, calculate the shrinkage of barrier film vertical and horizontal.The results are shown in Table 3:
Table 3 lithium ion battery separator resistance to elevated temperatures
| Barrier film sample | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Celgard2400 |
| Horizontal percent thermal shrinkage (%) | 0.8 | 0.8 | 0.8 | 1.0 | 0.8 | Fusing |
| Longitudinal percent thermal shrinkage (%) | 1.2 | 1.0 | 1.0 | 1.1 | 0.9 | Fusing |
Barrier film assembled battery is tested:
Lithium ion battery separator prepared by Celgard2400 barrier film and embodiment 1, embodiment 5 is assembled into 77122 soft-package batteries respectively, and this employing iron phosphate lithium positive pole sheet and MCMB negative plate, electrolyte is by LiPF
6, EC and DEC composition.Above-mentioned battery charge and discharge cycles 500 times under 0.2C, 0.5C and 1C condition, battery capacity conservation rate the results are shown in Table 4:
Table 4 lithium ion battery charge-discharge performance
| Barrier film sample | Embodiment 1 | Embodiment 5 | Celgard2400 |
| Initial capacity conservation rate (%) | 100 | 100 | 100 |
| Lower 500 the circulation volume conservation rates (%) of 0.2C | 92.4 | 92.1 | 88.4 |
| Lower 500 the circulation volume conservation rates (%) of 0.5C | 89.1 | 88.6 | 87.1 |
| Lower 500 the circulation volume conservation rates (%) of 1C | 87.3 | 87.0 | 85.8 |
Claims (6)
1. a preparation method for the lithium ion battery barrier film of high temperature-resistant cellulose fiber base material, it is characterized in that, concrete steps are as follows:
The first step: the aqueous polyurethane emulsion mechanical foaming by solid content being 38wt%, blowing ratio is 1:8, foamed glue is delivered to bubble bath device, and cellulose fiber base material immerses bubble bath applying glue by traction, after infrared or airflow drying, foamed glue forms porous adhesive layer at substrate surface; The thickness of this porous adhesive layer is 1 μm, and average pore size is 2 μm;
Second step: inorganic coating is coated cellulose fiber base material and porous adhesive layer surface recombination formation inorganic coating;
3rd step: the composite material obtained by second step, after infrared radiation or airflow drying, obtains high temp resistance lithium ion cell barrier film;
The preparation method of described inorganic coating is: be dissolved in by adhesive in solvent, then inorganic particle and adhesion promoter is added, adopt extra-high-pressure nano homogenizer homogenizing, wherein, weight of solvent is 1.5 ~ 2 times of inorganic particle weight, adhesive weight is 2 ~ 5% of inorganic particle weight, and adhesion promoter weight is 0.1 ~ 0.5% of inorganic particle weight;
The particle size distribution range of described inorganic particle is D
10: 1 ~ 1.5 μm, D
50: 2 ~ 2.5 μm, D
97: 3 ~ 3.5 μm;
The lithium ion battery barrier film of described high temperature-resistant cellulose fiber base material, its thickness is 20 ~ 40 μm, and porosity is 40 ~ 60%, and air permeability is 15 ~ 30sec/100cc, and this barrier film comprises cellulose fiber base material, porous adhesive layer and inorganic coating.
2. the preparation method of the lithium ion battery barrier film of high temperature-resistant cellulose fiber base material according to claim 1, is characterized in that, described inorganic particle is one or more in alundum (Al2O3), silicon dioxide, zirconium dioxide.
3. the preparation method of the lithium ion battery barrier film of high temperature-resistant cellulose fiber base material according to claim 1, is characterized in that, described adhesive is one or more in Kynoar, polyimides, polyether sulfone.
4. the preparation method of the lithium ion battery barrier film of high temperature-resistant cellulose fiber base material according to claim 1, it is characterized in that, described adhesion promoter is one or more in vinyltriethoxysilane, methyl triethoxysilane, vinyl three (2-methoxy ethoxy) silane.
5. the preparation method of the lithium ion battery barrier film of high temperature-resistant cellulose fiber base material according to claim 1, is characterized in that, described solvent is the one in DMF or 1-METHYLPYRROLIDONE.
6. the preparation method of the lithium ion battery barrier film of high temperature-resistant cellulose fiber base material according to claim 1, is characterized in that, the solution temperature of described adhesive in described solvent is 50 DEG C.
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