CN109149020A - Carbon nanotube-graphene-aramid fiber conductive material, lithium air battery positive electrode material and lithium-air battery - Google Patents
Carbon nanotube-graphene-aramid fiber conductive material, lithium air battery positive electrode material and lithium-air battery Download PDFInfo
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- CN109149020A CN109149020A CN201811051018.9A CN201811051018A CN109149020A CN 109149020 A CN109149020 A CN 109149020A CN 201811051018 A CN201811051018 A CN 201811051018A CN 109149020 A CN109149020 A CN 109149020A
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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
- H01M12/00—Hybrid cells; Manufacture thereof
- H01M12/08—Hybrid cells; Manufacture thereof composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type
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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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/90—Selection of catalytic material
- H01M4/9075—Catalytic material supported on carriers, e.g. powder carriers
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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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/96—Carbon-based electrodes
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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
- Y02E60/10—Energy storage using batteries
Abstract
The invention belongs to electrochemical material technical fields, and in particular to carbon nanotube-graphene-aramid fiber conductive material, lithium air battery positive electrode material and lithium-air battery.Carbon nanotube-graphene-aramid fiber conductive material provided by the invention is successively made through mixing shearing, dry and roll-in by including carbon nanotube, graphene, aramid fiber, shaping assistant, the raw material for preparing for discongesting agent, dispersing agent and alcoholic solvent；Carbon nanotube-graphene-aramid fiber the conductive material has hole.Embodiment the result shows that, using above-mentioned material provided by the invention prepare lithium-air battery, in 0.5mA/cm2When, specific capacity is in 1100mAh/g or more；In 9.65mA/cm2Under the conditions of high-discharge-rate, specific capacity is still in 600mAh/g or more.
Description
Technical field
The invention belongs to electrochemical material technical fields, and in particular to carbon nanotube-graphene-aramid fiber conductive material and its
Preparation method, lithium air battery positive electrode material and preparation method thereof and lithium-air battery.
Background technique
Lithium-air battery be it is a kind of make cathode with lithium, using the oxygen in air as the battery of anode reactant, because of its tool
There is energy density more higher than lithium ion battery and receives significant attention.But lithium-air battery needs what is solved to ask there is very much
Topic, if the control problem of moisture is exactly one of them.Lithium-air battery is to need opening using the oxygen in air as reactive material
It puts and works under system, and contain water in air, once will be reacted into lithium-air battery with negative electrode material, reduce lithium air
The chemical property of battery, therefore, lithium-air battery is higher to the performance requirement of positive electrode.
Lithium-air battery is mostly anode with the composite material of carbon base body supporting catalytic active at present, such as with carbon nanotube base
Material, then loads the composite membrane formed after the noble metals such as Ru, Pt, Pd, Au, Rh or Ag, although this composite material can be used as
Lithium air battery positive electrode materials'use, but it is unsatisfactory using the volumetric properties of the lithium-air battery of material preparation.
Summary of the invention
The purpose of the present invention is to provide a kind of carbon nanotube-graphene-aramid fiber conductive material, materials provided by the invention
With excellent electric conductivity, when as lithium air battery positive electrode materials'use, the higher lithium-air battery of capacity can be obtained.
To achieve the goals above, the invention provides the following technical scheme:
The present invention provides a kind of carbon nanotube-graphene-aramid fiber conductive materials, by including carbon nanotube, graphene, virtue
Synthetic fibre fiber, the raw material for preparing for discongesting agent, dispersing agent and solvent are successively made through mixing shearing, dry and roll-in；
Carbon nanotube-graphene-aramid fiber the conductive material has hole.
Preferably, the mass ratio of the carbon nanotube, graphene and aramid fiber is (0.3~0.5): (0.1~0.3):
1。
Preferably, the aramid fiber includes p-aramid fiber chopped strand and para-aramid pulp fiber.
Preferably, the mass ratio of the p-aramid fiber chopped strand and para-aramid pulp fiber is 1:(0.8~1.5).
Preferably, the aperture of the hole of the carbon nanotube-graphene-aramid fiber conductive material is 2~120nm；With a thickness of
0.05~0.2mm.
The present invention also provides carbon nanotube-graphene-aramid fiber conductive material preparation method described in above-mentioned technical proposal,
The following steps are included:
Mixture including carbon nano tube dispersion liquid, graphene dispersing solution and aramid fiber dispersion liquid is sheared, is obtained
To mixed slurry；
Roll-in will be carried out after mixed slurry drying, obtains carbon nanotube-graphene-aramid fiber conductive material.
Preferably, the speed of the shearing is 1200~2000r/min, and the time of shearing is 30~60min；
The line pressure of the roll-in is 15~30kN/m.
The present invention provides a kind of lithium air battery positive electrode materials, including stacking gradually compound porous metals paillon, preventing
It is made described in carbon nanotube-graphene-aramid fiber conductive material or above-mentioned technical proposal described in water ventilated membrane and above-mentioned technical proposal
Carbon nanotube-graphene-aramid fiber conductive material that Preparation Method is prepared.
The present invention provides the preparation methods of lithium air battery positive electrode material described in above-mentioned technical proposal, including by porous gold
Belong to paillon, waterproof ventilated membrane and carbon nanotube-graphene-aramid fiber conductive material to be successively bonded, then compacting is combined.
The present invention provides a kind of lithium-air battery, including anode cover, anode, diaphragm, cathode, negative electrode casing and electrolyte,
The just extremely preparation method preparation described in lithium air battery positive electrode material or above-mentioned technical proposal described in above-mentioned technical proposal
Obtained lithium sky cell positive material.
Carbon nanotube-graphene-aramid fiber conductive material provided by the invention, by including carbon nanotube, graphene, aramid fiber fibre
Dimension, shaping assistant, the raw material for preparing for discongesting agent, dispersing agent and alcoholic solvent are successively made through mixing shearing, dry and roll-in；Institute
Carbon nanotube-graphene-aramid fiber conductive material is stated with hole.The present invention is answered carbon nanotube and graphene using aramid fiber
Unify body, obtains the material with porous framework structure, the oxygen be conducive in air enters reaction system；Graphene is received with carbon
Mitron is used cooperatively, and the electric conductivity of material and the adsorption capacity to oxygen can be improved, further increase electronics in reaction system
The activity of transmission speed and positive electrode.Embodiment the result shows that, utilize above-mentioned material provided by the invention preparation lithium air
Battery, in 0.5mA/cm2When, specific capacity is in 1100mAh/g or more；In 9.65mA/cm2Under the conditions of high-discharge-rate, specific capacity is still
In 600mAh/g or more.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of lithium-air battery provided by the invention；
Fig. 2 is that high rate performance of the 1 gained lithium-air battery of embodiment under different discharge-rates recycles comparison diagram；
In figure, 1 is porous anode battery case, and 2 be air pole, and 21 be porous metals paillon, and 22 be waterproof ventilated membrane, and 23 are
Porous aramid fiber conductive paper, 3 be electrolyte, and 4 be diaphragm, and 5 be cathode, and 6 be negative electrode casing.
Specific embodiment
The present invention provides a kind of carbon nanotube-graphene-aramid fiber conductive materials, by including carbon nanotube, graphene, virtue
Synthetic fibre fiber, the raw material for preparing for discongesting agent, dispersing agent and solvent are successively made through mixing shearing, dry and roll-in；
Carbon nanotube-graphene-aramid fiber the conductive material has hole.
The raw material for preparing of carbon nanotube-graphene-aramid fiber conductive material provided by the invention includes carbon nanotube, the carbon
Nanotube is preferably multi-walled carbon nanotube, and the diameter of the carbon nanotube is preferably 30~150nm, more preferably 40~125nm,
It is further preferably 50~100nm；The length of carbon nanotube is preferably 3~10 μm, and more preferably 5~9 μm, be further preferably 7~8 μm.
The raw material for preparing of carbon nanotube-graphene-aramid fiber conductive material provided by the invention includes graphene, the graphite
The purity of alkene is preferably 98~99%；The number of plies of the graphene is preferably 3~10, and more preferably 3~5.
The raw material for preparing of carbon nanotube-graphene-aramid fiber conductive material provided by the invention includes aramid fiber, the virtue
Synthetic fibre fiber preferably includes p-aramid fiber chopped strand and para-aramid pulp fiber；The diameter of the p-aramid fiber chopped strand is excellent
10~14 μm, more preferably 11~13 μm are selected as, are further preferably 12 μm；Length is preferably 3~5mm, more preferably 3~4mm, then
Preferably 4mm.The length of the para-aramid pulp fiber is preferably 1.2~2mm, more preferably 1.4~1.8mm, further preferably
For 1.5~1.6mm.
In the present invention, the mass ratio of the p-aramid fiber chopped strand and para-aramid pulp fiber is preferably 1:(0.8
~1.5), more preferably 1:(0.9~1.2), it is further preferably 1:1.
In the present invention, the mass ratio of the carbon nanotube, graphene and aramid fiber is preferably (0.3~0.5): (0.1
~0.3): 1, more preferably (0.4~0.5): (0.2~0.3): 1, it is further preferably 0.5:0.3:1.
The raw material for preparing of carbon nanotube-graphene-aramid fiber conductive material provided by the invention includes discongesting agent, described to discongest
Agent includes polyethylene glycol oxide or dodecyl sodium sulfate (SDBS).
The raw material for preparing of carbon nanotube-graphene-aramid fiber conductive material provided by the invention includes dispersing agent, the dispersion
Agent preferably includes lauryl sodium sulfate (SDS) or polyvinylpyrrolidone (PVP).
The raw material for preparing of carbon nanotube-graphene-aramid fiber conductive material provided by the invention includes solvent, and the solvent is excellent
Choosing includes water and alcohol；The water is preferably deionized water, and the alcohol preferably includes ethyl alcohol.
Carbon nanotube-graphene-aramid fiber conductive material of the present invention has hole, and the aperture of the hole is preferably 2
~120nm, more preferably 2~80nm are further preferably 2~50nm；The ratio of the carbon nanotube-graphene-aramid fiber conductive material
Surface area is preferably 55~70m2/ g, more preferably 60~70m2/ g is further preferably 65~70m2/g.Carbon nanotube-the graphite
Alkene-aramid fiber conductive material sheet resistance is preferably 10~30 Ω/, more preferably 10~20 Ω/, is further preferably 10~15
Ω/□.The intensity of the carbon nanotube-graphene-aramid fiber conductive material is preferably 0.2~0.5kg/mm2。
In the present invention, the thickness of the carbon nanotube-graphene-aramid fiber conductive material is preferably 0.05~0.2mm, more
Preferably 0.05~0.15mm is further preferably 0.08~0.1mm.
The present invention provides carbon nanotube-graphene-aramid fiber conductive material preparation method described in above-mentioned technical proposal, packets
Include following steps:
Mixture including carbon nano tube dispersion liquid, graphene dispersing solution and aramid fiber dispersion liquid is sheared, is obtained
To mixed slurry；
Roll-in will be carried out after mixed slurry drying, obtains carbon nanotube-graphene-aramid fiber conductive material.
The present invention cuts the mixture including carbon nano tube dispersion liquid, graphene dispersing solution and aramid fiber dispersion liquid
It cuts, obtains mixed slurry.In the present invention, the carbon nano tube dispersion liquid preferably includes carbon nanotube, dispersing agent and ethyl alcohol；Institute
It states dispersing agent and preferably includes lauryl sodium sulfate (SDS).The mass ratio of the carbon nanotube, dispersing agent and ethyl alcohol is preferably 1:
(0.01~0.05): (300~400), more preferably 1:(0.01~0.04): (320~375), further preferably for 1:(0.02~
0.04): (325~350).The present invention does not have particular/special requirement to the preparation method of the carbon nano tube dispersion liquid, preferably will be above-mentioned
After component mixing, ultrasonic disperse is uniform.
In the present invention, the graphene dispersing solution preferably includes graphene, dispersing agent and ethyl alcohol, and the graphene divides
The mass ratio of powder and ethyl alcohol is preferably 1:(0.01~0.05): (300~400), more preferably 1:(0.01~0.04): (320
~375) it is further preferably, 1:(0.02~0.04): (325~350).The present invention does not have the preparation method of the graphene dispersing solution
There is particular/special requirement, preferably will after the above components are mixed, ultrasound is uniformly.
In the present invention, the aramid fiber dispersion liquid preferably includes aramid fiber, discongests agent and water, and the aramid fiber is fine
Tieing up, discongesting agent and the mass ratio of water is preferably 1:(0.005~0.01): (200~300), more preferably 1:(0.006~
0.009): (220~275) are further preferably 1:(0.007~0.008): (235~265).
In the present invention, the aramid fiber preferably includes p-aramid fiber chopped strand and para-aramid pulp fiber；Institute
State p-aramid fiber chopped strand it is corresponding to discongest agent be preferably dodecyl sodium sulfate, the para-aramid pulp fiber is corresponding
Discongesting agent is preferably polyethylene glycol oxide.
In the present invention, the preparation method of the aramid fiber dispersion liquid preferably includes:
P-aramid fiber chopped strand is mixed with water, dodecyl sodium sulfate then is added to mixed material and is discongested,
Obtain p-aramid fiber chopped strand dispersion liquid.In the present invention, the temperature discongested is preferably 40~60 DEG C, more preferably 45
~55 DEG C, be further preferably 48~52 DEG C；The time discongested is preferably 15~30min, more preferably 17~28min, then excellent
It is selected as 20~25min.
Para-aramid pulp fiber is mixed with water, polyethylene glycol oxide is then added into mixed material, is discongested, obtains
To para-aramid pulp fiber dispersion.In the present invention, the para-aramid pulp fiber discongest temperature be preferably 40~
60 DEG C, more preferably 45~55 DEG C are further preferably 48~52 DEG C；The time discongested is preferably 15~30min, more preferably
17~28min is further preferably 20~25min.
Above-mentioned gained p-aramid fiber chopped strand dispersion liquid is mixed with para-aramid pulp fiber dispersion, obtains aramid fiber
Fiber dispersion.P-aramid fiber chopped strand and para-aramid pulp fiber are preferably used cooperatively by the present invention, be can be improved and are led
The intensity and toughness of electric material.
After obtaining carbon nano tube dispersion liquid, graphene dispersing solution and aramid fiber dispersion liquid, the present invention divides carbon nanotube
Dispersion liquid, graphene dispersing solution and the mixing of aramid fiber dispersion liquid, then shear gained mixture, obtain mixed slurry.
In the present invention, the rate of the shearing is preferably 1200~2000r/min, more preferably 1500~1800r/min, further preferably
For 1600~1700r/min；The time of the shearing is preferably 30~60min, more preferably 35~55min, is further preferably 40
~50min.
After obtaining mixture, the mixed slurry is dried the present invention, and the mode of the drying is preferably that vacuum is cold
It is lyophilized dry, the temperature of the drying is preferably -15~-30 DEG C, more preferably -18~-25 DEG C；The time of the drying is preferably
12~20h, more preferably 15~18h.
After drying, the material after the drying is carried out roll-in by the present invention, and it is conductive to obtain carbon nanotube-graphene-aramid fiber
Material.In the present invention, the line pressure of the roll-in is preferably 15~30kN/m, more preferably 17~28kN/m, further preferably for
20~25kN/m.The number of the roll-in is preferably 3~5 times, and more preferably 4~5 times.
The present invention also provides a kind of lithium air battery positive electrode material, including stack gradually compound porous metals paillon,
Described in carbon nanotube-graphene-aramid fiber conductive material or above-mentioned technical proposal described in waterproof ventilated membrane and above-mentioned technical proposal
Carbon nanotube-graphene-aramid fiber conductive material that preparation method is prepared.
Lithium air battery positive electrode material of the present invention includes stacking gradually compound porous metals paillon, waterproof ventilated membrane
With carbon nanotube-graphene-aramid fiber conductive material.The material of the porous metals paillon is preferably copper or aluminium；The porous gold
The thickness for belonging to paillon is preferably 15~30 μm, and more preferably 17~27 μm, be further preferably 20~25 μm；The porous metals paillon
The aperture of mesoporous is preferably 50~100 μm, and more preferably 60~90 μm, be further preferably 70~80 μm；The spacing in adjacent two hole is excellent
150~200 μm, more preferably 160~190 μm are selected as, are further preferably 170~180 μm.
In the present invention, the waterproof ventilated membrane is preferably polyethylene (PE) gas permeable polymer film, the waterproof ventilated membrane
For commercial product well known to those skilled in the art.
The present invention stacks gradually porous metals paillon, waterproof ventilated membrane and carbon nanotube-graphene-aramid fiber conductive material
It is compound, using porous metals paillon as collector, it is easy to positive electrode electronic transmission and collects；Waterproof ventilated membrane can not only prevent air
In moisture enter in battery system, protect cathode lithium piece, moreover it is possible to the spilling for preventing electrolyte improves the safety of lithium-air battery
Property；Carbon nanotube-graphene-aramid fiber conductive fiber has porous structure, good intensity and toughness, is serving as lithium-air battery just
The carrier and catalyst of the reactive substance of pole material promote lithium-air battery to have excellent chemical property.
The present invention also provides the preparation methods of lithium air battery positive electrode material described in above-mentioned technical proposal, including will be porous
Metal foil, waterproof ventilated membrane and carbon nanotube-graphene-aramid fiber conductive material are successively bonded, and then compacting is combined.
The present invention is to the porous metals paillon, waterproof ventilated membrane and carbon nanotube-graphene-aramid fiber conductive material patch
Conjunction mode does not have particular/special requirement, can make three kinds of material tight fittings.In the present invention, pressure when compacting is preferably 0.1
~0.5MPa, more preferably 0.1~0.3MPa are further preferably 0.15~0.3MPa；The time of the compacting is preferably 2~
10min, more preferably 3~8min are further preferably 4~5min.Compacting of the present invention preferably carries out at room temperature.
The present invention also provides a kind of lithium-air batteries, including anode cover, anode, diaphragm, cathode, negative electrode casing and electrolysis
Liquid, the just extremely preparation method system described in lithium air battery positive electrode material or above-mentioned technical proposal described in above-mentioned technical proposal
Standby obtained lithium sky cell positive material.
As shown in Figure 1, lithium-air battery provided by the invention includes anode cover 1, positive 2, diaphragm 4, cathode 5, negative electrode casing 6
With electrolyte 3；Described positive 2 include that porous metals paillon 21, waterproof ventilated membrane 22 and carbon nanotube-graphene-aramid fiber are conductive
Material 23.
In the present invention, the anode cover is preferably porous anode shell；The electrolyte preferably includes LiPF6；It is described negative
Highly preferred includes lithium piece；The diaphragm preferably includes polypropylene diaphragm.
The present invention does not have particular/special requirement to the assemble method of the lithium-air battery, preferably (i.e. empty according to anode cover, anode
Air exhaustion), diaphragm, cathode and negative electrode casing sequence be assembled into lithium-air battery.
In embodiment of above, agents useful for same is commercial product well known to those skilled in the art.
In order to further illustrate the present invention, with reference to the accompanying drawings and examples to carbon nanotube-graphite provided by the invention
Alkene-aramid fiber conductive material, lithium air battery positive electrode material and lithium-air battery are described in detail, but cannot understand them
For limiting the scope of the present invention.
Embodiment 1
It weighs 0.5g aramid short fiber and 0.005g dodecyl sodium sulfate is placed in a beaker, 45 DEG C of warm water is added
240g is standing and soaking 20min, and for several times, beater mashing is stand-by for filtering cleaning；
It weighs 0.5g ppta-pulp fibre and 0.005g polyethylene glycol oxide is placed in a beaker, the warm water (40 of 240g is added
DEG C), it is standing and soaking 20min, beater mashing is stand-by；
0.5g carbon nanotube is weighed respectively and 0.3g graphene is placed in a beaker, and is dispersed in the ethyl alcohol of 350g, then
Above-mentioned aramid short fiber dispersion liquid, ppta-pulp fibre dispersion liquid are uniformly mixed by stainless steel fluid mixer,
High-speed shearing machine, which is sheared, is made mixed slurry.
Above-mentioned mixed slurry is freeze-dried by freeze drier, carbon nanotube-graphene-virtue is made in roll-forming
Synthetic fibre conductive material.
It is according to schematic diagram described in Fig. 1, porous metals paillon, waterproof ventilated membrane and carbon nanotube-graphene-aramid fiber is conductive
Material is successively bonded, then re-compacted at lithium air battery positive electrode material.
With LiPF6For electrolyte, polypropylene porous film is diaphragm, and lithium piece is cathode, by porous anode battery case, air
Pole, diaphragm, cathode and negative electrode casing sequence be assembled into aramid fiber porous, electrically conductive paper lithium-air battery.
Embodiment 2~3
Carbon nanotube-graphene-aramid fiber conductive material, lithium air battery positive electrode material are prepared according to the method for embodiment 1
And lithium-air battery, the difference is that raw material dosage and technological parameter, are specifically listed in Table 1 below.
1 Examples 1 to 3 raw material dosage of table and technological parameter
Performance characterization and result
Utilize the surface of four probe resistance instrument testing example, 1~3 gained carbon nanotube-graphene-aramid fiber conductive material
Resistance is tested carbon nanotube-graphene-aramid fiber conductive material specific surface area and aperture using specific surface area analysis instrument, is utilized
The tensile strength of the method test material of counterweight is hung under unit cross-sectional area, test result is listed in table 2；
Carbon nanotube-graphene-aramid fiber conductive material structure and performance parameter obtained by 2 Examples 1 to 3 of table
By 2 test result of table it is found that carbon nanotube-graphene-aramid fiber conductive material provided by the invention has preferably
Strength character and electric conductivity, when as lithium air battery positive electrode material, to the stability for improving lithium-air battery chemical property
It is advantageous with electron transfer rate；Carbon nanotube-graphene-the pore structure that aramid fiber conductive material has and excellent electric conductivity
Can, it is capable of providing good oxygen adsorption capacity and oxygen reduction activity, so as to improve the capacity of battery, multiplying power and cycle performance.
Under the conditions of different discharge-rates, the specific capacity of 1~3 gained lithium-air battery of testing example, to investigate battery
Circulating ratio performance, wherein discharge-rate and specific capacity are using the area of air pole and quality as calculating standard, and test result is such as
Shown in Fig. 2 and table 3.As shown in Figure 2,1 gained lithium-air battery of embodiment specific capacity with higher and excellent high rate performance.
The test result of embodiment 2 and 3 is close with embodiment 1, and specific test result is listed in Table 3 below.
Lithium-air battery circulation test result obtained by 3 Examples 1 to 3 of table
By 3 test result of table it is found that lithium-air battery provided by the invention specific capacity with higher.And in different electric discharges
Under multiplying power, the specific capacity conservation rate of battery is higher, when discharge-rate is 9.6mA/cm2When, after charge and discharge cycles 10 times, specific volume
Measuring conservation rate is still 94%, shows good multiplying power and cycle performance.
As seen from the above embodiment, the present invention is using carbon nanotube-graphene-aramid fiber conductive material as reactive substance
Carrier and catalyst, porous framework structure, good intensity and tough performance greatly improve the performance of lithium-air battery；Cooperation tool
There is transmission and collect more empty metal foils of electric function and the film for capableing of waterproof and breathable, makes lithium air battery positive electrode material
Comprehensive performance gets a promotion, and the lithium-air battery using positive electrode preparation has excellent high rate performance.
Above scheme provided by the invention, raw material sources are extensive, and preparation method is simple, easily-controllable, and cost is relatively low, are suitable for promoting
Using.
Although above-described embodiment is made that detailed description to the present invention, it is only a part of the embodiment of the present invention,
Rather than whole embodiments, people can also obtain other embodiments under the premise of without creativeness according to the present embodiment, these
Embodiment belongs to the scope of the present invention.
Claims (10)
1. a kind of carbon nanotube-graphene-aramid fiber conductive material, by include carbon nanotube, graphene, aramid fiber, discongest agent,
Dispersing agent and solvent prepare raw material, are successively made through mixing shearing, dry and roll-in；
Carbon nanotube-graphene-aramid fiber the conductive material has hole.
2. carbon nanotube-graphene-aramid fiber conductive material as described in claim 1, which is characterized in that the carbon nanotube,
The mass ratio of graphene and aramid fiber is (0.3~0.5): (0.1~0.3): 1.
3. carbon nanotube-graphene-aramid fiber conductive material as described in claim 1, which is characterized in that the aramid fiber packet
Include p-aramid fiber chopped strand and para-aramid pulp fiber.
4. carbon nanotube-graphene-aramid fiber conductive material as claimed in claim 3, which is characterized in that the p-aramid fiber is short
The mass ratio for cutting fiber and para-aramid pulp fiber is 1:(0.8~1.5).
5. carbon nanotube-graphene-aramid fiber conductive material as claimed in claim 1 or 2, which is characterized in that the carbon nanometer
The aperture of pipe-graphene-aramid fiber conductive material hole is 2~120nm；With a thickness of 0.05~0.2mm.
6. the preparation method of any one of Claims 1 to 5 carbon nanotube-graphene-aramid fiber conductive material, including following step
It is rapid:
Mixture including carbon nano tube dispersion liquid, graphene dispersing solution and aramid fiber dispersion liquid is sheared, is mixed
Close slurry；
Roll-in will be carried out after mixed slurry drying, obtains carbon nanotube-graphene-aramid fiber conductive material.
7. preparation method as claimed in claim 6, which is characterized in that the speed of the shearing is 1200~2000r/min, is cut
The time cut is 30~60min；
The line pressure of the roll-in is 15~30kN/m.
8. a kind of lithium air battery positive electrode material, including stacking gradually compound porous metals paillon, waterproof ventilated membrane and right
It is required that 1~5 described in any item carbon nanotube-graphene-aramid fiber conductive materials or the preparation method system of claim 6 or 7
Standby obtained carbon nanotube-graphene-aramid fiber conductive material.
9. the preparation method of lithium air battery positive electrode material described in claim 8, including by porous metals paillon, waterproof ventilated membrane
It is successively bonded with carbon nanotube-graphene-aramid fiber conductive material, then compacting is combined.
10. a kind of lithium-air battery, including anode cover, anode, diaphragm, cathode, negative electrode casing and electrolyte, which is characterized in that institute
State the lithium that preparation method described in lithium air battery positive electrode material just extremely according to any one of claims 8 or claim 9 is prepared
Empty cell positive material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110729134A (en) * | 2019-10-25 | 2020-01-24 | 陕西科技大学 | Nano NiCo2O4/rGO/ANF composite film and preparation method and application thereof |
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| CN109149020B (en) | 2020-09-25 |
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Effective date of registration: 20220413 Address after: 452470 Henan Xinbo Mine Equipment Technology Co., Ltd. (Jiaohe Village, Zhongyue District) Patentee after: HENAN KELAIWEI NANO CARBON MATERIAL Co.,Ltd. Address before: 330000 west of Jinsha 3rd road and south of Fushan 1st Road, Xiaolan economic and Technological Development Zone, Nanchang County, Nanchang City, Jiangxi Province Patentee before: JIANGXI KELAIWEI CARBON NANO MATERIALS Co.,Ltd. |