CN204991851U - Metal -air cell positive pole and metal -air cell - Google Patents
Metal -air cell positive pole and metal -air cell Download PDFInfo
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- CN204991851U CN204991851U CN201520441574.2U CN201520441574U CN204991851U CN 204991851 U CN204991851 U CN 204991851U CN 201520441574 U CN201520441574 U CN 201520441574U CN 204991851 U CN204991851 U CN 204991851U
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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
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Abstract
The utility model relates to a metal -air cell is anodal, including carbon nanotube network structure and the catalyst granules of setting in this carbon nanotube network structure, this carbon nanotube network structure includes a plurality of range upon range of carbon nanotube membranes each other, and every layer of carbon nanotube membrane includes a plurality of epimembranal faces of these carbon nanotube that are on a parallel with basically, just follows the carbon nanotube that same direction extends basically. The utility model discloses still relate to a metal -air cell.
Description
Technical field
The utility model relates to a kind of metal-air cell, particularly relates to a kind of the metal-air cell positive pole and the metal-air cell that contain carbon nano-tube.
Background technology
Metal-air cell uses oxygen as the battery of positive electrode active materials, has the advantages such as high, the easy miniaturization of energy density and lightweight, get more and more people's extensive concerning gradually in recent years.According to the difference of negative metal, metal-air cell comprises lithium-air battery, magnesium air cell, zinc-air cell and aluminum-air cell etc.
The operation principle of metal-air cell is: in discharge process, and negative pole produces metal ion and electronics, and metal ion through electrolyte, and is combined with oxygen and electronics at positive pole, generates the metal oxide of solid; In charging process, the metal oxide of solid decomposes, and forms metal ion, oxygen and electronics, and metal ion, through electrolyte, to be combined with electronics at positive pole and to form metal.The chemical equation of positive pole is 2M
++ O
2+ 2e
-m
2o
2, the chemical equation of negative pole is M M
++ e
-.The positive pole of metal-air cell generally comprises porous carbon materials as conductive carrier and the catalyst of load on porous carbon.Because discharge process generates insoluble metal oxide at positive pole, these metal oxides are constantly deposited in the duct of conductive carbon material, oxygen and the metal ion transmittability in positive pole is caused to reduce, thus make redox reaction rate reduction, cause the energy conversion efficiency of metal-air cell and power density to reduce.In material with carbon element, carbon nano-tube has high specific area, more can support space for catalyst provides.
Utility model content
In view of this, necessaryly provide a kind of carbon nano-tube that utilizes as the metal-air cell positive pole of catalyst carrier and metal-air cell.
A kind of metal-air cell positive pole, comprise carbon nanotube network and be arranged on the catalyst granules in this carbon nanotube network, this carbon nanotube network comprises multiple mutually stacked carbon nano-tube film, every layer of carbon nano-tube film comprises and is multiplely basically parallel to this carbon nano-tube film surface, and substantially along the carbon nano-tube that equidirectional extends.
A kind of metal-air cell, comprising: negative pole; Above-mentioned metal-air cell positive pole; And electrolyte, this electrolyte is arranged between metal-air cell positive pole and negative pole.
Compare with prior art, because this metal-air cell positive pole carbon nano-tube is parallel to this carbon nano-tube film surface substantially, this carbon nano-tube film is made to have less thickness, and owing to there is a large amount of gap between carbon nano-tube, enable metal ion and oxygen be easy to go deep into this metal-air cell positive pole inner, thus the utilance of catalyst granules is maximized.
Accompanying drawing explanation
The metal-air cell anode structure schematic diagram that Fig. 1 provides for the utility model embodiment.
The stereoscan photograph photo of the carbon nano-tube film of the metal-air cell positive pole that Fig. 2 provides for the utility model embodiment.
The structural representation of the metal-air cell positive pole that Fig. 3 provides for another embodiment of the utility model.
The structural representation of the metal-air cell positive pole that Fig. 4 provides for the another embodiment of the utility model.
The optical photograph of the carbon nanotube paper that Fig. 5 provides for the utility model embodiment.
The structural representation of the metal-air cell that Fig. 6 provides for the utility model embodiment.
Transmission electron microscope (TEM) photo of the Ru catalyst metals O for cathode of air battery that Fig. 7 provides for the utility model embodiment.
ESEM (SEM) photo after the Ru catalyst metals O for cathode of air battery electric discharge that Fig. 8 provides for the utility model embodiment.
The Ru catalyst lithium-air battery discharge curve that Fig. 9 provides for the utility model embodiment.
The TEM photo of the Pd catalyst metals O for cathode of air battery that Figure 10 provides for the utility model embodiment.
SEM photo after the Pd catalyst metals O for cathode of air battery electric discharge that Figure 11 provides for the utility model embodiment.
The Pd catalyst lithium-air battery discharge curve that Figure 12 provides for the utility model embodiment.
Main element symbol description
| Metal-air cell positive pole | 10 |
| Carbon nanotube network | 12 |
| Carbon nano-tube film | 122 |
| Catalyst granules | 14 |
| Plus plate current-collecting body | 16 |
| Metal-air cell negative pole | 20 |
| Anode active material layer | 22 |
| Negative current collector | 24 |
| Electrolyte | 30 |
| Barrier film | 40 |
| Oxygen permeation membrane | 50 |
| Housing | 60 |
Following embodiment will further illustrate the utility model in conjunction with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1, the utility model execution mode provides a kind of metal-air cell positive pole 10, comprises carbon nanotube network 12 and is arranged on the catalyst granules 14 on the tube wall of the carbon nano-tube in this carbon nanotube network 12.This carbon nanotube network 12 comprises multiple mutually stacked carbon nano-tube film 122.
Every layer of carbon nano-tube film 122 comprises and is multiplely basically parallel to this carbon nano-tube film 122 surface, and substantially along the carbon nano-tube of equidirectional arrangement, namely this carbon nano-tube film 122 is aligned carbon nanotube film.Refer to Fig. 2, the carbon nano-tube film 122 of this orientation preferably pulls the carbon nano-tube film of the self-supporting obtained from carbon nano pipe array, and this carbon nano-tube film 122 is made up of some carbon nano-tube, and described some carbon nano-tube are for be arranged of preferred orient in the same direction.Described preferred orientation refers to the overall bearing of trend of most of carbon nano-tube in carbon nano-tube film 122 substantially in the same direction.And the overall bearing of trend of described most of carbon nano-tube is basically parallel to the surface of carbon nano-tube film 122.Further, in described carbon nano-tube film 122, most carbon nano-tube is joined end to end by Van der Waals force.Particularly, substantially in the most of carbon nano-tube extended in the same direction in described carbon nano-tube film 122, each carbon nano-tube and carbon nano-tube adjacent are in the direction of extension joined end to end by Van der Waals force, thus make this carbon nano-tube film 122 realize self-supporting.Certainly, there is the carbon nano-tube of minority random alignment in described carbon nano-tube film 122, these carbon nano-tube can not form obviously impact to the overall orientation arrangement of carbon nano-tube most of in carbon nano-tube film 122.Further, described carbon nano-tube film 122 can comprise multiple continuously and the carbon nano-tube fragment aligned.The plurality of carbon nano-tube fragment is joined end to end by Van der Waals force.Each carbon nano-tube fragment comprises multiple carbon nano-tube be parallel to each other, and the plurality of carbon nano-tube be parallel to each other is combined closely by Van der Waals force.In addition, the most carbon nano-tube extended substantially in the same direction in described carbon nano-tube film 122, and nisi linearity, can be suitable bend; Or and non-fully arranges according on bearing of trend, can be suitable depart from bearing of trend.Therefore, can not get rid of between carbon nano-tube arranged side by side in the most carbon nano-tube extended substantially in the same direction of carbon nano-tube film 122 and may there is part contact.Have larger specific area owing to pulling the carbon nano-tube film 122 obtained from carbon nano pipe array, therefore, this carbon nano-tube film 122 has larger viscosity.
Described self-supporting is that carbon nano-tube film 122 does not need large-area carrier supported, as long as and on one side or relatively both sides provide support power can be unsettled on the whole and keep self membranaceous state, by this carbon nano-tube film 122 be placed in (or being fixed on) keep at a certain distance away arrange two supporters on time, the carbon nano-tube film 122 between two supporters can the membranaceous state of unsettled maintenance self.Described self-supporting mainly through exist in carbon nano-tube film 122 continuously through Van der Waals force join end to end extend arrangement carbon nano-tube and realize.
In this metal-air cell positive pole 10, the carbon nano-tube film 122 of the plurality of orientation can along the stacked setting of equidirectional or along at least two stacked settings of different directions.When the carbon nano-tube film 122 of the plurality of orientation is arranged along equidirectional is stacked, the most carbon nano-tube in this metal-air cell positive pole 10 extend along equidirectional.Refer to Fig. 3, when the carbon nano-tube film 122 of the plurality of orientation is arranged along at least two different directions are stacked, mutually intersect between carbon nano-tube in the carbon nano-tube film 122 that different directions is stacked, to have angle β with shape, β is greater than 0 degree and is less than or equal to 90 degree (0 ° of < β≤90 °), is preferably 90 °.In this metal-air cell positive pole 10, the number of plies of this carbon nano-tube film 122 is not limit, and can select according to actual needs, is preferably 10 ~ 200 layers of mutual stacked setting of carbon nano-tube film 122, is more preferably 100 ~ 200 layers of mutual stacked setting of carbon nano-tube film 122.Carbon nano-tube film 122 quantity is very few, and the carbon nano-tube that can be used for supported catalyst particles 14 is less, and carbon nano-tube film 122 quantity is too much, and the micropore between carbon nano-tube reduces, and is unfavorable for the transmission of metal ion and oxygen.Micropore size in this carbon nanotube network 12 is preferably 10 nanometer ~ 1 μm nanometer.Directly contact between the plurality of carbon nano-tube and combined closely by Van der Waals force, thus forming the carbon nanotube network 12 of a self-supporting, in this carbon nanotube network 12, adjacent carbon nano-tube is interconnected, thus forms a conductive network.Because this carbon nano-tube film 122 has very thin thickness, this carbon nanotube network 12 after stacked for multilayer carbon nanotube film 122 setting still had thinner thickness.The stacked thickness of 100 ~ 200 layers of carbon nano-tube film 122 is about 4 ~ 10 μm.Be appreciated that, this carbon nano-tube film 122 obtains owing to can pull from array, therefore there is comparatively uniform thickness, stacked for the plurality of carbon nano-tube film 122 carbon nanotube network 12 arranging rear formation is also had comparatively uniform thickness, thus there is comparatively uniform conductivity.
The material of this catalyst granules 14 can be noble metal, as Ru, Pt, Pd, Au, Rh or Ag.This catalyst granules 14 is preferably dimensioned to be 1 nanometer ~ 10 nanometer.This catalyst granules 14 is uniformly distributed in this carbon nanotube network 12, fixing by the tube wall absorption of carbon nano-tube.Still have a large amount of gap between the carbon nano-tube that surface is supported with this catalyst granules 14, this metal-air cell positive pole 10 entirety is loose structure, is conducive to the infiltration of metal ion and oxygen.In this metal-air cell positive pole 10, the mass percent of catalyst granules 14 can be 50% ~ 90%, is preferably 75% ~ 85%.The amount of the catalyst granules 14 that the carbon nanotube network 12 of unit are supports can be 0.5mg/cm
2~ 2mg/cm
2.
This metal-air cell positive pole 10 can only be made up of catalyst granules 14 and carbon nano-tube, the carbon nano-tube film 122 of this metal-air cell positive pole 10 is self supporting structure, the effect of collector can be played, again can supported catalyst particles 14, without the need to arranging collector in addition.
Refer to Fig. 4, in another embodiment, this metal-air cell positive pole 10 can comprise plus plate current-collecting body 16 further, and this carbon nano-tube film 122 is stacked is arranged on this plus plate current-collecting body 16 surface.This plus plate current-collecting body 16 is for being connected this carbon nano-tube film 122 with external circuit.This plus plate current-collecting body 16 can be the porous, electrically conductive stratiform structure of self-supporting.In one embodiment, this plus plate current-collecting body 16 can be wire netting, and metal can be enumerated as nickel, aluminium, copper, titanium or stainless steel.In another embodiment, this plus plate current-collecting body 16 is formed by material with carbon element, as carbon fiber fabric plies, carbon nanotube paper, graphene layer, graphene-carbon nano tube composite bed or cracking carbon-coating.
Refer to Fig. 5, in a preferred embodiment, this plus plate current-collecting body 16 is carbon nanotube paper, and this carbon nanotube paper is the flake of black, self-supporting, can flexible as paper, resistance to bending, and has toughness.The thickness of this carbon nanotube paper can be 500 nanometer ~ 500 micron.This carbon nanotube paper can be made up of 50 ~ 1000 layers of mutual stacked carbon nano-tube film 122.Every layer of carbon nano-tube film 122 comprises multiple substantially along the carbon nano-tube of equidirectional arrangement, and namely this carbon nano-tube film 122 is aligned carbon nanotube film.Carbon nano-tube film 122 in this carbon nanotube paper can be identical with carbon nano-tube film 122 structure in this carbon nanotube network 12, is the carbon nano-tube film 122 pulling the self-supporting obtained from carbon nano pipe array.Because this carbon nano-tube film 122 has larger specific area, therefore this carbon nano-tube film 122 has larger viscosity, in this carbon nanotube paper, is attracted each other between adjacent carbon nano-tube film 122 by Van der Waals force, just can not separate once stacked, thus form overall structure.There is micropore between carbon nano-tube in this carbon nanotube paper, oxygen can be made to pass through.
Preferably, the carbon nano-tube film 122 in this carbon nanotube paper is stacked along equidirectional, and this carbon nanotube paper is made up of the basic carbon nano-tube arranged along equidirectional.Substantially the carbon nano-tube along equidirectional arrangement makes carbon nanotube paper have excellent conductivity in particular directions.This carbon nanotube paper is used as plus plate current-collecting body 16 in metal-air cell positive pole 10, and the electric current produced by carbon nanotube network 12 carries out collecting and conducting to external circuit.
More preferably, have at least the orientation of carbon nano-tube in a carbon nano-tube film 122 identical with the orientation of carbon nano-tube in the carbon nano-tube film 122 in this carbon nanotube paper in this carbon nanotube network 12, carbon nanotube network 12 is namely made forward to arrange at least partly with the carbon nano-tube in carbon nanotube paper, advantageously in increasing the contact area between carbon nano-tube, make carbon nanotube network 12 more firm with the combination of carbon nanotube paper.
This carbon nanotube paper preferably directly contacts with this carbon nanotube network 12, namely the carbon nano-tube in this carbon nanotube network 12 with the carbon nano-tube in this carbon nanotube paper for directly to contact, and combined by Van der Waals force, without the need to binding agent, carbon nano-tube film 122 in this carbon nanotube paper and carbon nanotube network 12 has great specific area, between the two once be combined by Van der Waals force and be namely difficult to separately.The area of this carbon nanotube network 12 is preferably less than the area of this carbon nanotube paper, and is arranged on the local location of this carbon nanotube paper.Such as, this carbon nanotube paper has rectangle structure, and this carbon nanotube network 12 is arranged on one end of this carbon nanotube paper.The other end of this carbon nanotube paper may be used for connecting external circuit.
In this metal-air cell positive pole 10, this catalyst granules 14 is not only formed in this carbon nanotube network 12 outer surface, also deeply be arranged on the carbon nano tube surface being positioned at carbon nanotube network 12 inside, make all surface of the most carbon nano-tube in this metal-air cell positive pole 10 all obtain fully effective utilization, thus the loading of catalyst granules 14 can be made to maximize.Because carbon nano-tube in this metal-air cell positive pole 10 is parallel to this carbon nano-tube film 122 surface substantially, this carbon nano-tube film 122 is made to have less thickness, and owing to there is a large amount of gap between carbon nano-tube, after supported catalyst particles 14, this metal-air cell positive pole 10 still has a large amount of micropore, enable metal ion and oxygen be easy to go deep into this metal-air cell positive pole 10 inner, thus the utilance of catalyst granules 14 is maximized.
The preparation method of this metal-air cell positive pole 10 can be: pull from carbon nano pipe array and obtain carbon nano-tube film 122; At the surperficial supported catalyst particles 14 of this carbon nano-tube film 122, form catalyst composite carbon nanotube film; And by mutually stacked for multiple catalyst composite carbon nanotube film, form this metal-air cell positive pole 10.When this metal-air cell positive pole 10 has plus plate current-collecting body 16, described that multiple catalyst composite carbon nanotube film is mutually stacked specifically mutually stacked on this plus plate current-collecting body 16 surface by this catalyst composite carbon nanotube film.
Can should be chemical vapour deposition technique or physical vaporous deposition in the method for this carbon nano-tube film surface supported catalyst particles, such as vacuum vapour deposition or magnetron sputtering method.When supported catalyst particles, can by controlling the formation time of catalyst granules 14, such as, in this metal-air cell positive pole 10 of the time controling of vacuum evaporation or magnetron sputtering catalyst granules 14 mass percentage.
Refer to Fig. 6, the utility model embodiment provides a kind of metal-air cell 100 further, comprises above-mentioned metal-air cell positive pole 10, negative pole 20 and electrolyte 30.
This negative pole 20 comprises anode active material layer 22, and this anode active material layer 22 can be metal or alloy, such as, can think the alloy of lithium, sodium, potassium, magnesium, calcium, aluminium, zinc, iron, silver or above-mentioned metal.Preferably, this metal-air cell 100 is lithium-air battery, and this anode active material layer 22 contains lithium metal or lithium alloy, as lithium-aluminium alloy, lithium-tin alloy, Li-Pb alloy or Li-Si alloy.This negative pole 20 can comprise negative current collector 24 further, and this anode active material layer 22 is arranged on this negative current collector 24 surface.This negative current collector 24 is for being electrically connected this anode active material layer 22 with external circuit.This negative current collector 24 can be the conductive laminated structure of self-supporting.In one embodiment, this negative current collector 24 can be the metal forming of atresia or the wire netting of porous, and metal can be enumerated as nickel, copper or stainless steel.In another embodiment, this negative current collector 24 is formed by material with carbon element, as carbon fiber fabric plies, carbon nanotube paper, graphene layer, graphene-carbon nano tube composite bed or cracking carbon-coating.
This electrolyte 30 is arranged between this metal-air cell positive pole 10 and negative pole 20, carries out metal ion conduction.This electrolyte 30 can be electrolyte, gel electrolyte or solid electrolyte.This electrolyte contains electrolytic salt and solvent.This solvent can be the solvent in metal-air cell conventional in prior art, it can be such as cyclic carbonate, linear carbonate, ring-type ethers, chain ethers, one or more in nitrile and amide-type, as ethylene carbonate (EC), diethyl carbonate (DEC), propene carbonate (PC), dimethyl carbonate (DMC), methyl ethyl carbonate (EMC), butylene, gamma-butyrolacton, gamma-valerolactone, dipropyl carbonate, 1-METHYLPYRROLIDONE (NMP), N-METHYLFORMAMIDE, N-methylacetamide, dimethyl formamide, diethylformamide, acetonitrile, propionitrile, methyl phenyl ethers anisole, succinonitrile, adiponitrile, glutaronitrile, methyl-sulfoxide, dimethyl sulfite, the combination of one or more in tetraethyleneglycol dimethyl ether (TEGDME).This electrolytic salt is selected according to the kind of metal ion, can select metal-air cell electrolytic salt conventional in prior art.For example, when this metal-air cell 100 is lithium-air battery, the electrolytic salt in this electrolyte can be lithium salts, as lithium chloride (LiCl), lithium hexafluoro phosphate (LiPF
6), LiBF4 (LiBF
4), methanesulfonic acid lithium (LiCH
3sO
3), trifluoromethanesulfonic acid lithium (LiCF
3sO
3), hexafluoroarsenate lithium (LiAsF
6), hexafluoro-antimonic acid lithium (LiSbF
6), lithium perchlorate (LiClO
4), Li [BF
2(C
2o
4)], Li [PF
2(C
2o
4)
2], Li [N (CF
3sO
2)
2], Li [C (CF
3sO
2)
3], one or more in di-oxalate lithium borate (LiBOB) and two trifluoromethanesulfonimide lithium (LiTFSI).This electrolyte can infiltrate this positive pole 10 and negative pole 20.
Further, this metal-air cell 100 can comprise barrier film 40, and this barrier film 40 makes this positive pole 10 and negative pole 20 electric insulation, and has loose structure, and electrolyte can be made to pass through.This barrier film 40 can be polyolefin porous membrane, glass fibre non-woven or resin nonwoven fabrics etc.
In addition, this metal-air cell 100 also comprises oxygen permeation membrane 50, and this oxygen permeation membrane 50 is arranged on this positive pole 10 side, and for making oxygen enter positive pole 10, and the water completely cut off in air and carbon dioxide enter positive pole 10.In addition, this this metal-air cell 100 also comprises housing 60, and this positive pole 10, negative pole 20, electrolyte 30 and barrier film 40 are arranged in this housing, and this oxygen permeation membrane 50 is arranged on the opening part that this housing 60 is positioned at this positive pole 10 side.
Embodiment 1
Pull from carbon nano pipe array and obtain carbon nano-tube film.Ru metallic particles is formed on carbon nano-tube film surface by magnetron sputtering method.Refer to Fig. 7, Ru grain diameter is about 3nm ~ 5nm, evenly and being attached on the tube wall of this carbon nano-tube of dispersion.Form the carbon nano-tube film of Ru metallic particles on stacked 100 layers of this surface, carbon nanotube paper surface, form lithium air battery positive electrode.These 100 layers of carbon nano-tube films are stacked along orthogonal direction respectively, make the bearing of trend of carbon nano-tube in carbon nanotube network mutually vertical.Carbon nanotube paper is that 500 layers of carbon nano-tube film-stack obtain, and the thickness of carbon nanotube paper is about 40 microns.Negative pole is lithium metal.Electrolyte is that the LiTFSI of 0.1mol/L is dissolved in TEGDME.Taken out by this positive pole after being discharged by the lithium-air battery of assembling, refer to Fig. 8, the tube wall can seeing this carbon nano-tube forms Li2O2 solid particle, and size is about 300nm ~ 500nm.Refer to Fig. 9, lithium-air battery adopts current density to be that to be discharged to cutoff capacity be 1000mAh/g to 500mA/g, and discharge voltage plateau is 2.75V, with theoretical value 2.96V closely, illustrate that lithium air battery positive electrode has higher electrode reaction efficiency.
Embodiment 2
Pull from carbon nano pipe array and obtain carbon nano-tube film.Pd metallic particles is formed on carbon nano-tube film surface by magnetron sputtering method.Refer to Figure 10, Pd grain diameter is about 5nm ~ 10nm, evenly and being attached on the tube wall of this carbon nano-tube of dispersion.Form the carbon nano-tube film of Pd metallic particles on stacked 100 layers of this surface, carbon nanotube paper surface, form lithium air battery positive electrode.These 100 layers of carbon nano-tube films are stacked along orthogonal direction respectively, make the bearing of trend of carbon nano-tube in carbon nanotube network mutually vertical.Carbon nanotube paper is that 500 layers of carbon nano-tube film-stack obtain, and the thickness of carbon nanotube paper is about 40 microns.Negative pole is lithium metal.Electrolyte is that the LiTFSI of 0.1mol/L is dissolved in TEGDME.Taken out by this positive pole after being discharged by the lithium-air battery of assembling, refer to Figure 11, the tube wall can seeing this carbon nano-tube forms Li2O2 solid particle, and size is about 300nm ~ 500nm.Refer to Figure 12, lithium-air battery adopts current density to be that to be discharged to cutoff capacity be 1000mAh/g to 500mA/g, and discharge voltage plateau is 2.8V, with theoretical value 2.96V closely, illustrate that lithium air battery positive electrode has higher electrode reaction efficiency.
In addition, those skilled in the art also can do other changes in the utility model spirit, and certainly, these changes done according to the utility model spirit, all should be included within the utility model scope required for protection.
Claims (10)
1. a metal-air cell positive pole, it is characterized in that, comprise carbon nanotube network and be arranged on the catalyst granules in this carbon nanotube network, this carbon nanotube network comprises multiple mutually stacked carbon nano-tube film, and every layer of carbon nano-tube film comprises and be multiplely basically parallel to this carbon nano-tube film surface and substantially along the carbon nano-tube that equidirectional extends.
2. metal-air cell positive pole as claimed in claim 1, it is characterized in that, the particle diameter of this catalyst granules is 1 nanometer ~ 10 nanometer.
3. metal-air cell positive pole as claimed in claim 1, is characterized in that, is substantially joined end to end by Van der Waals force along each carbon nano-tube in the carbon nano-tube of equidirectional extension with carbon nano-tube adjacent in the direction of extension in this carbon nano-tube film.
4. metal-air cell positive pole as claimed in claim 1, it is characterized in that, the aperture of this carbon nanotube network is 10 nanometer ~ 1 μm nanometers.
5. metal-air cell positive pole as claimed in claim 1, it is characterized in that, this carbon nanotube network comprises 10 ~ 200 layers of mutual stacked carbon nano-tube film.
6. metal-air cell positive pole as claimed in claim 1, it is characterized in that, this carbon nanotube network is self supporting structure, as the plus plate current-collecting body of this metal-air cell positive pole.
7. metal-air cell positive pole as claimed in claim 1, it is characterized in that, comprise plus plate current-collecting body further, this carbon nanotube network is arranged on this anode collection surface.
8. metal-air cell positive pole as claimed in claim 7, it is characterized in that, this plus plate current-collecting body is wire netting, carbon fiber fabric plies, carbon nanotube paper, graphene layer, graphene-carbon nano tube composite bed or cracking carbon-coating.
9. metal-air cell positive pole as claimed in claim 7, it is characterized in that, this plus plate current-collecting body is carbon nanotube paper, and this carbon nanotube paper comprises multiple mutually stacked carbon nano-tube film.
10. a metal-air cell, is characterized in that, comprising:
Negative pole;
As the metal-air cell positive pole in claim 1-9 as described in any one; And
Electrolyte, this electrolyte is arranged between metal-air cell positive pole and negative pole.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106328964A (en) * | 2015-06-25 | 2017-01-11 | 清华大学 | Metal-air battery positive electrode and metal-air battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106328964A (en) * | 2015-06-25 | 2017-01-11 | 清华大学 | Metal-air battery positive electrode and metal-air battery |
| CN106328964B (en) * | 2015-06-25 | 2019-04-23 | 清华大学 | Metal-air battery anode and metal-air battery |
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