CN110890502A - Preparation method of novel composite lithium-sulfur battery diaphragm with POSS grafted carbon nanotubes - Google Patents
Preparation method of novel composite lithium-sulfur battery diaphragm with POSS grafted carbon nanotubes Download PDFInfo
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- H—ELECTRICITY
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- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
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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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
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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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
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- 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
Abstract
The invention discloses a preparation method of a novel lithium-sulfur battery diaphragm of POSS grafted carbon nano tubes, which comprises the steps of taking carboxylated carbon nano tubes (CNTs-COOH) as a raw material, grafting polyhedral oligomeric silsesquioxane (POSS) onto the surfaces of the CNTs to obtain a CNTs-POSS material; then preparing the prepared CNTs-POSS, polyether sulfone (PES), a pore-forming agent and an organic solvent into a solution according to a certain mass ratio, placing the obtained solution in an oil bath pan, heating at a constant temperature, and stirring until the CNTs-POSS is uniformly dispersed in a PES matrix to form an electrostatic spinning precursor solution; and (3) uniformly spinning the obtained electrostatic spinning precursor solution on a PE diaphragm to obtain the POSS grafted carbon nanotube composite lithium-sulfur battery diaphragm. The POSS-based solid electrolyte with the functions of sulfur interception and lithium conduction is synthesized and compounded with a polyether sulfone/polyethylene (PES/PE) high-strength heat-resistant diaphragm to construct a solid electrolyte modified high-strength composite diaphragm, and the composite diaphragm is used for solving the problems of capacity attenuation caused by shuttle of polysulfide ions in a lithium sulfur battery and safety risks caused by puncture of dendrites under abnormal working conditions.
Description
Technical Field
The invention relates to a preparation method of a composite diaphragm for a lithium-sulfur battery, in particular to a novel diaphragm for inhibiting the shuttle effect of the lithium-sulfur battery and a preparation and application method thereof.
Background
The lithium-sulfur battery has the advantages of abundant resources, low cost, high biocompatibility of the positive electrode material sulfur, theoretical energy value of 2600 Wh/kg and the like. As an important component of the lithium-sulfur battery, the diaphragm not only controls the dynamic process of ion transmission in the battery, but also fundamentally determines the working mechanism of the battery, and influences the specific energy, rate capability, cycle life and safety of the battery.
Since the Carbon Nanotubes (CNTs) are discovered in 1991, the unique surface effect, quantum size effect and hollow tubular structure endow the carbon nanotubes with excellent heat conduction, electric conduction, mechanical properties and the like and extremely high length-diameter ratio, so that the Carbon Nanotubes (CNTs) become the object of research on a plurality of polymer-based composite materials. Meanwhile, surface modification and functional treatment of the carbon nano tube are also widely researched, and the treated carbon nano tube has good solubility and is beneficial to uniform dispersion and forming processing. POSS is used as a novel organic-inorganic nano hybrid material, has excellent processability and toughness of organic materials, and simultaneously reserves heat resistance, oxidation resistance and excellent mechanical properties of inorganic materials, and is one of important means for preparing performance-improved composite materials at present. PEI has excellent thermodynamic stability, film forming property and wettability, and has become an important development object of commercial lithium battery diaphragm materials. The prepared CNTs-POSS material is added into the PEI casting solution to reduce the crystallinity of PEI, so that the porosity of the PEI polymer diaphragm is improved. The higher porosity of the diaphragm can improve the liquid absorption rate of the diaphragm, and further improve the comprehensive properties of the diaphragm, such as ionic conductivity, ion transference number and the like.
Disclosure of Invention
The invention aims to provide a preparation method of a POSS grafted carbon nanotube composite lithium-sulfur battery diaphragm, which can effectively block shuttling of polysulfide in a lithium-sulfur battery so as to improve the capacity performance and the cycle performance of the lithium-sulfur battery, and the diaphragm is prepared by the following specific steps:
1. a preparation method of a novel composite lithium-sulfur battery diaphragm of a POSS grafted carbon nanotube is characterized by comprising the following specific steps:
(1) activation of carboxylated carbon nanotubes (CNTs-COOH): weighing a certain amount of carboxylated carbon nanotubes (CNTs-COOH) and placing the weighed carboxylated carbon nanotubes (CNTs-COOH) in a beaker, then adding a certain amount of organic solvent, placing the mixture in an ultrasonic machine for ultrasonic dispersion, pouring the dispersed liquid into a four-mouth bottle, performing oil bath at a constant temperature of 60 ℃ in an oil bath pot, then adding a proper amount of activating agent for activation, and stirring and activating at 60 ℃ for 3-5 hours to obtain activated carboxylated carbon nanotubes (CNTs-COOH);
(2) grafting POSS: weighing a certain amount of octavinyl lantern type semi-siloxane POSS with amino in a three-neck bottle, adding an organic solvent, and introducing N into the three-neck bottle2Discharging the air in the bottle, and ultrasonically dispersing for 2-3 h (the same step (1)) to obtain a dispersed POSS solution; adding the dispersed POSS solution into the four-mouth bottle in the step (1), stirring at 60 ℃ and continuing to react for 12-18h (continuously introducing N in the reaction process)2) (ii) a After the reaction is finished, carrying out suction filtration, and carrying out vacuum drying on a solid sample obtained after suction filtration at 60-80 ℃ for 72-96 h; after drying, grinding the dried solid sample by using a mortar to obtain CNTs-POSS black powder;
(3) preparing an electrostatic spinning precursor solution: preparing a solution from the prepared CNTs-POSS black powder, polyether sulfone (PES), a pore-forming agent and an organic solvent according to a certain mass ratio, placing the obtained solution in an oil bath pan, heating at a constant temperature of 70 ℃, and stirring until the CNTs-POSS is uniformly dispersed in a PES matrix to form a uniform electrostatic spinning precursor solution;
(4) preparing a POSS grafted carbon nanotube novel composite lithium-sulfur battery diaphragm: and (3) placing the electrostatic spinning precursor solution obtained in the step (3) in an electrostatic spinning device, opening an electrostatic spinning switch, spinning on a Polyethylene (PE) diaphragm, forming an even spinning layer of POSS grafted carbon nanotubes on the Polyethylene (PE) diaphragm, then placing the spinning layer at room temperature for slow drying for 2h, placing the spinning layer in a vacuum drying oven for drying for 3h at 40 ℃ after most of water is volatilized, then heating to 60 ℃ for drying for 5h, and finally drying at 70 ℃ for 12h to obtain the novel composite lithium-sulfur battery diaphragm of POSS grafted carbon nanotubes.
Particularly, the organic solvent in the steps (1) and (2) is one of tetrahydrofuran, toluene and chloroform.
Particularly, the ultrasonic machine in the step (1) is an ultrasonic cell crusher, wherein the ultrasonic dispersion time is 12-24h, the working time is set to be 60s, the pause time is set to be 2s, the ultrasonic frequency is set to be 99 times, and the power is 700W.
Specifically, in the four-mouth bottle reaction, carboxylated carbon nanotubes (CNTs-COOH), an activating agent, octavinyl lantern type semi-siloxane POSS with amino groups and an organic solvent are mixed according to the mass ratio: (4-16): (0.15-2.5):(3-15): (100).
In particular, it is characterized in that: the molecular structural formula of the octavinyl lantern type semi-siloxane POSS with amino in the step (2) is as follows:
in particular, it is characterized in that: the activating agent in the step (1) is one of N, N' -Carbonyl Diimidazole (CDI), ethylene diamine phosphate, propylene diamine phosphate, xylene, sodium fluosilicate, ammonium sulfate, ammonium chloride, ferrous sulfate and ammonium hydroxide.
In particular, it is characterized in that: the pore-forming additive in the step (3) is one of polyvinylpyrrolidone, carboxymethyl cellulose, methyl cellulose, copovidone, polyvinyl alcohol, polyethylene glycol and sodium nitrate; the organic solvent in the step (3) is one of dimethylacetamide, dimethylformamide, N-methylpyrrolidone, dimethyl sulfoxide and triethyl phosphate.
In particular, it is characterized in that: the mass ratio of PES, pore-forming additive and organic solvent in the step (3) is 1: (0.1-0.15):(2.5-4.5).
Particularly, the thickness of the POSS grafted carbon nanotube spinning layer of the POSS grafted carbon nanotube composite lithium-sulfur battery diaphragm in the step (4) is 200-600nm, and the thickness of the PE diaphragm is 9-25 μm.
The invention has the advantages that:
(1) the preparation process is simple, the raw materials are widely available, and the required experimental instruments are simple, so that the method can be used for large-scale production.
(2) POSS is successfully grafted on the carbon nano tube, so that the advantages of the carbon nano tube and the POSS are complementary. POSS with excellent performance and designable structure is grafted to CNTs, so that the dispersibility and the solubility of the carbon nano tube in the PES matrix can be improved, and the capability of the POSS for adsorbing polysulfide in the PES matrix by virtue of the conductivity of the carbon nano tube can be improved.
(3) The invention discloses a making method of composite lithium sulfur battery diaphragm of POSS grafting carbon nanometer tube,
the composite lithium-sulfur battery diaphragm has excellent porosity, liquid absorption rate, thermal stability and very high ionic conductivity.
(4) In the composite lithium-sulfur battery diaphragm of the POSS grafted carbon nano tube prepared by the invention, each layer has different functions and is mutually supplemented, the porous Polyethylene (PE) diaphragm matrix has high mechanical strength, the PES matrix has high thermal stability, and the CNTs-POSS doped into the PES matrix has the function of efficiently cutting sulfur and conducting lithium, so that the chemical performance of the lithium-sulfur battery is further improved.
Detailed Description
The present invention provides a preparation method of a composite lithium-sulfur battery diaphragm of POSS grafted carbon nanotubes, and the following examples are further illustrative of the present invention and are not intended to limit the scope of the present invention.
Example 1
(1) Weighing 2g of carboxylated carbon nanotubes (CNTs-COOH) in a 500mL beaker, adding 200mL of Tetrahydrofuran (THF), placing in an ultrasonic cell crusher, ultrasonically dispersing for 12h, setting the working time to be 60s, the intermittent time to be 2s, the ultrasonic frequency to be 99 times and the power to be 700W; pouring the dispersed liquid into a four-mouth bottle, performing oil bath at the constant temperature of 60 ℃ in an oil bath pan, adding 0.2g of N, N-Carbonyldiimidazole (CDI) for activation, and stirring and activating at 60 ℃ for 3 hours;
(2) weighing 2.5g of POSS in a beaker, adding 60 mL of tetrahydrofuran, and ultrasonically dispersing for 1 h (the same as the step (1)); introducing N into the four-mouth bottle2Discharging the air in the bottle, adding the dispersed liquid into a four-mouth bottle, stirring at 60 ℃ and continuing to react for 12 hours (continuously introducing N in the reaction process)2) (ii) a After the reaction is finished, performing suction filtration to obtain a CNTs-POSS solid sample, and performing vacuum filtration on the obtained CNPlacing the Ts-POSS solid sample at 60 ℃ for vacuum drying for 72 h; after drying, grinding the solid sample by using a mortar to obtain CNTs-POSS black powder;
(3) preparing a solution from 0.5g of CNTs-POSS, 8g of Polyetherimide (PEI), 1.5g of PVP and 40g of NMP in a four-mouth bottle, placing the obtained solution in an oil bath pan, heating at a constant temperature of 70 ℃, and stirring until the CNTs-POSS is uniformly dispersed in a PES matrix to form a uniform electrostatic spinning precursor solution;
(4) preparing a POSS grafted carbon nanotube novel composite lithium-sulfur battery diaphragm: and (3) placing the electrospinning precursor solution obtained in the step (3) in an electrostatic spinning device, opening an electrostatic spinning switch, spinning on a Polyethylene (PE) diaphragm, forming an even spinning layer of POSS grafted carbon nanotubes on the Polyethylene (PE) diaphragm, then slowly drying for 2 hours at room temperature, after most of water is volatilized, placing in a vacuum drying oven at 40 ℃ for drying for 3 hours, then heating to 60 ℃ for drying for 5 hours, and finally drying at 70 ℃ for 12 hours to obtain the novel composite lithium-sulfur battery diaphragm of POSS grafted carbon nanotubes.
Example 2
(1) Weighing 2.5g of carboxylated carbon nanotubes (CNTs-COOH) in a 500mL beaker, adding 200mL of toluene, placing in an ultrasonic cell crusher, ultrasonically dispersing for 12h, setting the working time to be 60s, the intermittent time to be 2s, the ultrasonic frequency to be 99 times and the power to be 700W; pouring the dispersed liquid into a four-mouth bottle, performing oil bath at the constant temperature of 60 ℃ in an oil bath pot, adding 0.3g of ethylenediamine phosphate for activation, and stirring and activating at 60 ℃ for 3 hours;
(2) weighing 3g of POSS in a beaker, adding 60 mL of toluene, and ultrasonically dispersing for 1 h (the same step (1)); introducing N into the four-mouth bottle2Discharging the air in the bottle, adding the dispersed liquid into a four-mouth bottle, stirring at 60 ℃ and continuing to react for 12 hours (continuously introducing N in the reaction process)2) (ii) a After the reaction is finished, carrying out suction filtration to obtain a CNTs-POSS solid sample, and placing the obtained CNTs-POSS solid sample at 60 ℃ for vacuum drying for 72 h; after drying, grinding the solid sample by using a mortar to obtain CNTs-POSS black powder;
(3) preparing a solution from 0.6g of CNTs-POSS, 8g of Polyetherimide (PEI), 1.5g of PVP and 39.5g of NMP in a four-mouth bottle, placing the obtained solution in an oil bath pan, heating at a constant temperature of 70 ℃, and stirring until the CNTs-POSS is uniformly dispersed in a PES matrix to form a uniform electrostatic spinning precursor solution;
(4) preparing a POSS grafted carbon nanotube novel composite lithium-sulfur battery diaphragm: and (3) placing the electrospinning precursor solution obtained in the step (3) in an electrostatic spinning device, opening an electrostatic spinning switch, spinning on a Polyethylene (PE) diaphragm, forming an even spinning layer of POSS grafted carbon nanotubes on the Polyethylene (PE) diaphragm, then slowly drying for 2 hours at room temperature, after most of water is volatilized, placing in a vacuum drying oven at 40 ℃ for drying for 3 hours, then heating to 60 ℃ for drying for 5 hours, and finally drying at 70 ℃ for 12 hours to obtain the novel composite lithium-sulfur battery diaphragm of POSS grafted carbon nanotubes.
Example 3
(1) Weighing 3g of carboxylated carbon nanotubes (CNTs-COOH) in a 500mL beaker, adding 200mL of chloroform, placing the beaker in an ultrasonic cell crusher for ultrasonic dispersion for 12h, setting the working time to be 60s, the intermittent time to be 2s, the ultrasonic frequency to be 99 times and the power to be 700W; pouring the dispersed liquid into a four-mouth bottle, performing oil bath at the constant temperature of 60 ℃ in an oil bath pan, adding 0.5g N, N-Carbonyldiimidazole (CDI) for activation, and stirring and activating at 60 ℃ for 3 hours;
(2) weighing a proper amount of POSS (polyhedral oligomeric silsesquioxane) in a beaker, adding 60 mL of chloroform, and ultrasonically dispersing for 1 h (the same step (1)); introducing N into the four-mouth bottle2Discharging the air in the bottle, adding the dispersed liquid into a four-mouth bottle, stirring at 60 ℃ and continuing to react for 12 hours (continuously introducing N in the reaction process)2) (ii) a After the reaction is finished, carrying out suction filtration to obtain a CNTs-POSS solid sample, and placing the obtained CNTs-POSS solid sample at 60 ℃ for vacuum drying for 72 h; after drying, grinding the solid sample by using a mortar to obtain CNTs-POSS black powder;
(3) 0.5g of CNTs-POSS, 8g of Polyetherimide (PEI), 1.5g of PVP and 40g of NMP are placed in a four-mouth bottle to prepare a solution, the obtained solution is placed in an oil bath kettle to be heated at a constant temperature of 70 ℃, and is stirred until the CNTs-POSS is uniformly dispersed in a PES matrix to form a uniform electrostatic spinning precursor solution;
(4) preparing a POSS grafted carbon nanotube novel composite lithium-sulfur battery diaphragm: and (3) placing the electrospinning precursor solution obtained in the step (3) in an electrostatic spinning device, opening an electrostatic spinning switch, spinning on a Polyethylene (PE) diaphragm, forming an even spinning layer of POSS grafted carbon nanotubes on the Polyethylene (PE) diaphragm, then slowly drying for 2 hours at room temperature, after most of water is volatilized, placing in a vacuum drying oven at 40 ℃ for drying for 3 hours, then heating to 60 ℃ for drying for 5 hours, and finally drying at 70 ℃ for 12 hours to obtain the novel composite lithium-sulfur battery diaphragm of POSS grafted carbon nanotubes.
And (3) carrying out physical and electrochemical performance tests on the obtained diaphragm: the method mainly comprises the tests of porosity, puncture resistance, rupture temperature, ionic conductivity, ion migration number and the like, and all indexes are shown in the table I. The resulting separator sheet was then loaded into a lithium sulfur battery for battery performance testing. The cycling performance of the cells was tested at room temperature at a current density of 0.5C (1C =1675mA/g) and is shown in table two. The rate performance of the battery is tested by cycling 100 cycles under different current densities of 0.5C, 1C, 2C and the like, and the rate performance of the lithium-sulfur battery is shown in the third table.
Table one: physical and chemical property test indexes of the diaphragms of the various embodiments
Table two: cycling Performance of the lithium-sulfur batteries of the examples
Table three: rate performance of lithium sulfur battery of each example
Claims (9)
1. A preparation method of a novel composite lithium-sulfur battery diaphragm of a POSS grafted carbon nanotube is characterized by comprising the following specific steps:
(1) activation of carboxylated carbon nanotubes (CNTs-COOH): weighing a certain amount of carboxylated carbon nanotubes (CNTs-COOH) and placing the weighed carboxylated carbon nanotubes (CNTs-COOH) in a beaker, then adding a certain amount of organic solvent, placing the mixture in an ultrasonic machine for ultrasonic dispersion, pouring the dispersed liquid into a four-mouth bottle, performing oil bath at a constant temperature of 60 ℃ in an oil bath pot, then adding a proper amount of activating agent for activation, and stirring and activating at 60 ℃ for 3-5 hours to obtain activated carboxylated carbon nanotubes (CNTs-COOH);
(2) grafting POSS: weighing a certain amount of octavinyl lantern type semi-siloxane POSS with amino in a three-neck bottle, adding an organic solvent, and introducing N into the three-neck bottle2Discharging the air in the bottle, and ultrasonically dispersing for 2-3 h (the same step (1)) to obtain a dispersed POSS solution; adding the dispersed POSS solution into the four-mouth bottle in the step (1), stirring at 60 ℃ and continuing to react for 12-18h (continuously introducing N in the reaction process)2) (ii) a After the reaction is finished, carrying out suction filtration, and carrying out vacuum drying on a solid sample obtained after suction filtration at 60-80 ℃ for 72-96 h; after drying, grinding the dried solid sample by using a mortar to obtain CNTs-POSS black powder;
(3) preparing an electrostatic spinning precursor solution: preparing a solution from the prepared CNTs-POSS black powder, polyether sulfone (PES), a pore-forming agent and an organic solvent according to a certain mass ratio, placing the obtained solution in an oil bath pan, heating at a constant temperature of 70 ℃, and stirring until the CNTs-POSS is uniformly dispersed in a PES matrix to form a uniform electrostatic spinning precursor solution;
(4) preparing a POSS grafted carbon nanotube novel composite lithium-sulfur battery diaphragm: and (3) placing the electrostatic spinning precursor solution obtained in the step (3) in an electrostatic spinning device, opening an electrostatic spinning switch, spinning on a Polyethylene (PE) diaphragm, forming an even spinning layer of POSS grafted carbon nanotubes on the Polyethylene (PE) diaphragm, then placing the spinning layer at room temperature for slow drying for 2h, placing the spinning layer in a vacuum drying oven for drying for 3h at 40 ℃ after most of water is volatilized, then heating to 60 ℃ for drying for 5h, and finally drying at 70 ℃ for 12h to obtain the novel composite lithium-sulfur battery diaphragm of POSS grafted carbon nanotubes.
2. A preparation method of a POSS grafted carbon nanotube modified composite lithium-sulfur battery diaphragm is characterized by comprising the following steps: the organic solvent in the steps (1) and (2) is one of tetrahydrofuran, toluene and chloroform.
3. A preparation method of a POSS grafted carbon nanotube modified composite lithium-sulfur battery diaphragm is characterized by comprising the following steps: the ultrasonic machine in the step (1) is an ultrasonic cell crusher, wherein the ultrasonic dispersion time is 12-24h, the working time is set to be 60s, the intermittent time is set to be 2s, the ultrasonic frequency is set to be 99 times, and the power is 700W.
4. A preparation method of a novel composite lithium-sulfur battery diaphragm of a POSS grafted carbon nanotube is characterized by comprising the following steps: in the four-mouth bottle reaction, a carboxylated carbon nanotube (CNTs-COOH), an activating agent and octavinyl lantern type semi-siloxane POSS with amino are adopted, and the mass ratio of organic solvents is as follows: (4-16): (0.15-2.5):(3-15): (100).
5. A preparation method of a novel composite lithium-sulfur battery diaphragm of a POSS grafted carbon nanotube is characterized by comprising the following steps: the molecular structural formula of the octavinyl lantern type semi-siloxane POSS with amino in the step (2) is as follows:
6. a preparation method of a novel composite lithium-sulfur battery diaphragm of a POSS grafted carbon nanotube is characterized by comprising the following steps: the activating agent in the step (1) is one of N, N' -Carbonyl Diimidazole (CDI), ethylene diamine phosphate, propylene diamine phosphate, xylene, sodium fluosilicate, ammonium sulfate, ammonium chloride, ferrous sulfate and ammonium hydroxide.
7. A preparation method of a novel composite lithium-sulfur battery diaphragm of a POSS grafted carbon nanotube is characterized by comprising the following steps: the pore-forming additive in the step (3) is one of polyvinylpyrrolidone, carboxymethyl cellulose, methyl cellulose, copovidone, polyvinyl alcohol, polyethylene glycol and sodium nitrate; the organic solvent in the step (3) is one of dimethylacetamide, dimethylformamide, N-methylpyrrolidone, dimethyl sulfoxide and triethyl phosphate.
8. A preparation method of a novel composite lithium-sulfur battery diaphragm of a POSS grafted carbon nanotube is characterized by comprising the following steps: the mass ratio of PES, pore-forming additive and organic solvent in the step (3) is 1: (0.1-0.15):(2.5-4.5).
9. A preparation method of a novel composite lithium-sulfur battery diaphragm of a POSS grafted carbon nanotube is characterized by comprising the following steps: the spinning layer thickness of the POSS grafted carbon nano tube composite lithium-sulfur battery diaphragm in the step (4) is 200-600nm, and the thickness of the PE diaphragm is 9-25 mu m.
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| BIN LIU等: "Flexible Carbon Nanotube Modified Separator for High-Performance Lithium-Sulfur Batteries", 《NANOMATERIALS》 * |
| SHASHA SONG等: "Polyhedral oligomeric silsesquioxane functionalized carbon nanotubes for high thermal conductive poly(vinylidene fluoride) composite membrane", 《MATERIALS AND DESIGN》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839143A (en) * | 2021-08-02 | 2021-12-24 | 兰溪聪普新材料有限公司 | Polyarylethersulfone lithium ion battery diaphragm and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110890502B (en) | 2022-11-29 |
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