CN104882611A - Electrochemical anodic electrode, power storage device containing anodic electrode, and preparation method thereof - Google Patents
Electrochemical anodic electrode, power storage device containing anodic electrode, and preparation method thereof Download PDFInfo
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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
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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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
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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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
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Abstract
The invention belongs to the technical field of power storage, and particularly relates to the anode of an electrochemical energy storage device. The anode comprises an anode coating and a substrate. The anode coating comprises an anode active substance, a binding element, and a conductive agent. The diameter of the active substance is a. The conductive agent at least comprises graphene. The anode is characterized in that the graphene is in the form of porous graphene and the pitch of holes in the graphene is b, wherein b is smaller than or equal to 10a. The anode of the electrochemical energy storage device adopts the porous graphene as the conductive agent. In this way, the diffusion resistance on ions in a direction vertical to the graphene plane is reduced, so that the anode is better in electrochemical performance.
Description
Technical field
The invention belongs to technical field of energy storage, particularly a kind of Anodic electrode, the energy storage device comprising this anode electrode and preparation method thereof.
Background technology
Since 1991, material with carbon element is creationary applies to field of lithium ion battery, and bringing the revolutionary change in this field---efficient and the carrying out of safety is repeatedly after discharge and recharge, and it is just applied on mobile phone, video camera, notebook computer and other portable electronics widely.Compared with traditional plumbic acid, Ni-Cd, MH-Ni battery, lithium ion battery has higher specific volume energy density, weight/power ratio energy density, better environment friendly, less self discharge and longer cycle life etc., is 21st century desirable movable electrical appliances power supply, electric car power supply and electricity storage station electrical storage device.
But along with the raising of sampling of living, people propose higher demand for experience to mobile electrical appliance: gentlier, thinner, less, more lasting, safer be that these experience representative several aspects, and be wherein one of most important experience more lastingly.This just proposes higher energy density demand to electrical storage device (battery), and the more excellent conductive agent of selectivity prepares battery, can improve the performance of battery significantly.
2004, strong K sea nurse (Andre K.Geim) of peace moral etc. of Univ Manchester UK adopted mechanical stripping method to prepare Graphene (Graphene) first, has pulled open the prelude of the preparation of this material, operational research thus.So-called Graphene, refers to a kind of plates of the arrangement in hexagonal annular between carbon atom, is usually made up of single or multiple lift graphite flake layer, infinitely can extends at two-dimensional space, can be described as proper two-dimensional structure material.It has the outstanding advantages such as specific area is large, electrical and thermal conductivity performance is excellent, thermal coefficient of expansion is low: specifically, high specific area (calculated value: 2630m
2/ g); High conductivity, carrier transport rate (200000cm
2/ Vs); High heat conductance (5000W/mK); High strength, high Young's modulus (1100GPa), fracture strength (125GPa).Therefore its in energy storage field, heat transfer field and Materials with High Strength field have great utilization prospect.
Specifically, because Graphene has excellent electric conductivity, and the quality of itself is extremely light, therefore, it is possible to effectively reduce conductive agent consumption, increases the content of active material in electrode, improves the energy density of battery; The internal resistance of battery can also be reduced simultaneously, improve the discharge voltage of battery, reduce the heat production in charge and discharge process; Therefore Graphene is one of ideal chose of lithium ion battery conductive agent.But the two-dimensional structure of Graphene itself, significantly limit lithium ion perpendicular to the diffusion on graphene film field direction, thus limits the performance of Graphene as lithium ion battery conductive agent performance.
In view of this, a kind of new grapheme material of necessary exploitation, its structure can not hinder ion perpendicular to the transmission on graphene sheet layer direction.
Summary of the invention
The object of the invention is to: for the deficiencies in the prior art, and a kind of Anodic electrode provided: this anode pole piece comprises anodic coating and base material, described anodic coating comprises anode active material, bonding agent and conductive agent, the average diameter of described active material is a, and described conductive agent is at least containing Graphene; Described Graphene is porous graphene, and average pitch of holes is b, and b≤10a.The electrochemical energy storing device anode of this structure, owing to employing porous graphene as conductive agent, less perpendicular to the diffusional resistance of graphene planes direction to ion, therefore has more excellent chemical property.
To achieve these goals, the present invention adopts following technical scheme:
A kind of Anodic electrode, comprise base material and be arranged at the anodic coating on described base material, described anodic coating comprises anode active material, bonding agent and conductive agent, and the average diameter of described anode active material is a, and described conductive agent is at least containing Graphene; It is characterized in that, described Graphene is porous graphene, and the average distance (average pitch of holes) between adjacent hole is b, and b≤10a.Average distance between described adjacent hole refers to the average distance between adjacent two bore edges, referred to as average pitch of holes.
One as Anodic electrode of the present invention is improved, and as the plane equivalent diameter D≤10a of described graphene sheet layer, described Graphene can be atresia Graphene; When described graphene film layer plane equivalent diameter refers to and the graphene sheet layer area of plane is converted into an area of a circle, described diameter of a circle.
One as Anodic electrode of the present invention is improved, and described anode active material is at least one in carbon class material, alloy type material, metal oxide series material, metal nitride materials and carbon compound; Described conductive agent can also contain at least one in conductive black, super conductive carbon, carbon nano-tube, conductive carbon fibres peacekeeping Ketjen black.
One as Anodic electrode of the present invention is improved, and the thickness of described porous graphene is less than or equal to 350nm, and the slice plane equivalent diameter D of described porous graphene is more than or equal to 5nm; The quality of described Graphene accounts for 0.05% ~ 10% of described anodic coating gross mass.
One as Anodic electrode of the present invention is improved, the average diameter d≤a in the hole of described porous graphene; The shape in hole is circle, square, triangle, ellipse or polygon.
One as Anodic electrode of the present invention is improved, the diameter d≤0.1a in the hole of described porous graphene, and the shape in the hole of described porous graphene is identical, area equation, and distance between adjacent hole is equal.
One as Anodic electrode of the present invention is improved, the average distance b≤2a between the adjacent hole of described porous graphene.
One as Anodic electrode of the present invention is improved, 5nm≤a≤500um.
A kind of electrochemical energy storing device, comprises anode electrode of the present invention, and described electrochemical energy storing device is any one in lead-acid battery, Ni-MH battery, lithium ion battery, lithium-sulfur cell, sodium-ion battery, Zinc ion battery and ultracapacitor.
The present invention also comprises a kind of preparation method of electrochemical energy storing device of the present invention, mainly comprises the steps:
Step 1, the preparation of anode pole piece: be that evenly (described anode active material is graphite, silicon, Si-C composite material, lithium titanate etc. for the anode active material of a, the conductive agent at least containing porous graphene, bonding agent and solvent by average diameter; Conductive agent position conductive black, super conductive carbon, carbon nano-tube, Ketjen black, atresia Graphene etc.; Bonding agent comprises Kynoar, butadiene-styrene rubber, neopelex etc.; Solvent is water, n-formyl sarcolysine base Topiramate Los oxazolidinone etc.), obtain anode slurry, be coated on base material afterwards, cold pressing, itemize, obtain anode pole piece after welding, wherein, the average distance between the adjacent hole of described porous graphene is b, and b≤10a;
Step 2, the preparation of finished product battery core: anode pole piece step 1 prepared and cathode sheet, barrier film are assembled and obtained naked battery core, enters shell/enter bag, drying, fluid injection afterwards, leaves standstill, changes into, obtains finished product battery core after shaping.
Beneficial effect of the present invention is: different from traditional electrode, strict regulations of the present invention are as the hole size of the porous graphene lamella of conductive agent and pitch of holes, namely as conductive agent, 10 times that its hole size is no more than active material particle, pitch of holes is no more than active substance particle size, the battery core prepared like this has better high rate charge-discharge performance.Because have the graphene conductive agent of this structure, the inhibition that it spreads lithium ion in charge and discharge process effectively can be avoided.
Embodiment
Below in conjunction with embodiment, the present invention and beneficial effect thereof are described in detail, but embodiments of the present invention are not limited thereto.
Comparative example 1, the preparation of anode pole piece: selection average grain diameter is the graphite of 1um is active material, afterwards according to graphite: sodium carboxymethylcellulose: butadiene-styrene rubber: the relationship between quality of conductive black (200nm)=94.7:1:2.3:2 weighs, add deionized water for stirring and obtain anode slurry, be coated on copper current collector, then through colding pressing, itemize, welding, to obtain anode pole piece after the operation such as rubberizing for subsequent use.
Battery is assembled: select cobalt acid lithium to be cathode active material, according to cathode capacities: the capacity relationship design battery of anode capacity=100:112.According to above-mentioned capacity relationship configuration cathode slurry and control coating quality, cold pressing afterwards, itemize, welding, obtain cathode sheet after rubberizing.The cathode sheet obtained, anode pole piece and barrier film are reeled and obtain naked battery core, select aluminum plastic film to be that closedtop, side seal are carried out in packaging bag, drying afterwards, fluid injection, leave standstill, change into, shaping, degasification obtain finished product lithium ion battery.
Comparative example 2, with comparative example 1 unlike, this comparative example comprises the steps:
The preparation of anode pole piece: selecting average grain diameter to be the graphite of 1um is active material, the plane equivalent diameter of lamella be 100um be conductive agent without hole Graphene (thickness is 3nm); Afterwards according to graphite: sodium carboxymethylcellulose: butadiene-styrene rubber: the relationship between quality of Graphene=96.2:1:2.3:0.5 weighs, add deionized water for stirring and obtain anode slurry, be coated on copper current collector, then through colding pressing, itemize, welding, to obtain anode pole piece after the operation such as rubberizing for subsequent use.
All the other are identical with comparative example 1, are not repeating here.
Embodiment 1, with comparative example 2 unlike, the present embodiment comprises the steps:
The preparation of anode pole piece: selection average grain diameter is the graphite of 1um is active material, the plane equivalent diameter of lamella is the porous graphene (thickness is 3nm) of 100um is conductive agent, the hole shape of this porous graphene is circular hole, the diameter in hole is 0.1um (0.1a), and pitch of holes is 10um (10a); Afterwards according to graphite: sodium carboxymethylcellulose: butadiene-styrene rubber: the relationship between quality of Graphene=96.2:1:2.3:0.5 weighs, add deionized water for stirring and obtain anode slurry, be coated on copper current collector, then through colding pressing, itemize, welding, to obtain anode pole piece after the operation such as rubberizing for subsequent use.
All the other are identical with comparative example 2, are not repeating here.
Embodiment 2, as different from Example 1, the present embodiment comprises the steps:
The preparation of anode pole piece: selection average grain diameter is the graphite of 1um is active material, the plane equivalent diameter of lamella is the porous graphene (thickness is 3nm) of 100um is conductive agent, the hole shape of this porous graphene is circular hole, the diameter in hole is 0.1um (0.1a), and pitch of holes is 2um (2a); Afterwards according to graphite: sodium carboxymethylcellulose: butadiene-styrene rubber: the relationship between quality of Graphene=96.2:1:2.3:0.5 weighs, add deionized water for stirring and obtain anode slurry, be coated on copper current collector, then through colding pressing, itemize, welding, to obtain anode pole piece after the operation such as rubberizing for subsequent use.
All the other are identical with embodiment 1, are not repeating here.
Embodiment 3, as different from Example 1, the present embodiment comprises the steps:
The preparation of anode pole piece: selection average grain diameter is the graphite of 1um is active material, the plane equivalent diameter of lamella is the porous graphene (thickness is 3nm) of 100um is conductive agent, the hole shape of this porous graphene is circular hole, the average diameter in hole is 0.1um (0.1a), and average pitch of holes is 0.4um (0.4a); Afterwards according to graphite: sodium carboxymethylcellulose: butadiene-styrene rubber: the relationship between quality of Graphene=96.2:1:2.3:0.5 weighs, add deionized water for stirring and obtain anode slurry, be coated on copper current collector, then through colding pressing, itemize, welding, to obtain anode pole piece after the operation such as rubberizing for subsequent use.
All the other are identical with embodiment 1, are not repeating here.
Embodiment 4, as different from Example 3, the present embodiment comprises the steps:
The preparation of anode pole piece: selection average grain diameter is the graphite of 1um is active material, the plane equivalent diameter of lamella is the porous graphene (thickness is 3nm) of 100um is conductive agent, the hole shape of this porous graphene is circular hole, the diameter in hole is 1um (a), and pitch of holes is 0.4um (0.4a); Afterwards according to graphite: sodium carboxymethylcellulose: butadiene-styrene rubber: the relationship between quality of Graphene=96.2:1:2.3:0.5 weighs, add deionized water for stirring and obtain anode slurry, be coated on copper current collector, then through colding pressing, itemize, welding, to obtain anode pole piece after the operation such as rubberizing for subsequent use.
All the other are identical with embodiment 3, are not repeating here.
Embodiment 5, as different from Example 3, the present embodiment comprises the steps:
The preparation of anode pole piece: selection average grain diameter is the graphite of 1um is active material, the plane equivalent diameter of lamella is the porous graphene (thickness is 3nm) of 100um is conductive agent, the hole shape of this porous graphene is circular hole, the average diameter in hole is 0.02um (0.02a), and average pitch of holes is 0.4um (0.4a); Afterwards according to graphite: sodium carboxymethylcellulose: butadiene-styrene rubber: the relationship between quality of Graphene=96.2:1:2.3:0.5 weighs, add deionized water for stirring and obtain anode slurry, be coated on copper current collector, then through colding pressing, itemize, welding, to obtain anode pole piece after the operation such as rubberizing for subsequent use.
All the other are identical with embodiment 3, are not repeating here.
Embodiment 6, as different from Example 3, the present embodiment comprises the steps:
The preparation of anode pole piece: selection average grain diameter is the silicon of 5nm is active material, the plane equivalent diameter of lamella is the porous graphene (thickness is 0.3nm) of 5nm is conductive agent, the hole shape of this porous graphene is regular hexagon, the equivalent diameter in hole is 1nm (0.2a), and average pitch of holes is 1nm (0.2a); Afterwards according to silicon: sodium carboxymethylcellulose: butadiene-styrene rubber: the relationship between quality of Graphene=94.2:1:2.3:2.5 weighs, add deionized water for stirring and obtain anode slurry, be coated on copper current collector, then through colding pressing, itemize, welding, to obtain anode pole piece after the operation such as rubberizing for subsequent use.
All the other are identical with embodiment 3, are not repeating here.
Embodiment 7, as different from Example 3, the present embodiment comprises the steps:
The preparation of anode pole piece: selection average grain diameter is the graphite of 1um is active material, the plane equivalent diameter of lamella is the porous graphene (thickness is 3nm) of 100um is conductive agent, the hole shape of this porous graphene is circular hole, the diameter in hole is 0.1um (0.1a), and pitch of holes is 0.4um (0.4a); Afterwards according to graphite: sodium carboxymethylcellulose: butadiene-styrene rubber: Graphene: the relationship between quality of super conductive carbon=94.7:1:2.3:0.05:1.95 weighs, add deionized water for stirring and obtain anode slurry, be coated on copper current collector, then through colding pressing, itemize, welding, to obtain anode pole piece after the operation such as rubberizing for subsequent use.
All the other are identical with embodiment 3, are not repeating here.
Embodiment 8, as different from Example 3, the present embodiment comprises the steps:
The preparation of anode pole piece: selection average grain diameter is the graphite of 1um is active material, the plane equivalent diameter of lamella is the porous graphene (thickness is 3nm) of 100um is conductive agent, the hole shape of this porous graphene is circular hole, the average diameter in hole is 0.1um (0.1a), and pitch of holes is 0.4um (0.4a); Afterwards according to graphite: sodium carboxymethylcellulose: butadiene-styrene rubber: the relationship between quality of Graphene=86.7:1:2.3:10 weighs, add deionized water for stirring and obtain anode slurry, be coated on copper current collector, then through colding pressing, itemize, welding, to obtain anode pole piece after the operation such as rubberizing for subsequent use.
All the other are identical with embodiment 3, are not repeating here.
Embodiment 9, prepared by electrode slice: selection average grain diameter is the hard carbon of 500um is active material, the plane equivalent diameter of lamella is the porous graphene (thickness is 100nm) of 200um is conductive agent, the hole shape of this porous graphene is triangle, the equivalent diameter in hole is 10um (0.02a), and pitch of holes is 20um (0.04a); Afterwards according to hard carbon: sodium carboxymethylcellulose: butadiene-styrene rubber: the relationship between quality of Graphene=96.2:1:2.3:0.5 weighs, add deionized water for stirring and obtain electrode slurry, be coated on copper current collector, then through colding pressing, itemize, welding, to obtain pole piece after the operation such as rubberizing for subsequent use.
Ultracapacitor is assembled: by compatible above-mentioned electrode and barrier film lamination, enter shell, fluid injection afterwards, encapsulate and obtain ultracapacitor.
Characterize and test:
Volume test: respectively volume test is carried out to the lithium ion battery that comparative example 1,2 and embodiment 1-8 prepare.In 35 DEG C of environment, by following flow process, volume test is carried out to battery core: leave standstill 3min; 0.5C constant current charge is to 4.2V, and constant voltage charge is to 0.05C; Leave standstill 3min; 0.5C constant-current discharge obtains discharge capacity D0 first to 3.0V; Complete volume test after leaving standstill 3min, acquired results is in table 1.
The ultracapacitor of embodiment 9 is tested as follows: in 35 DEG C of environment, by following flow process, volume test is carried out to battery core: leave standstill 3min; 0.5C constant current charge is to 1V; Leave standstill 3min; 0.5C constant-current discharge obtains discharge capacity D0 first to 0V; Complete volume test after leaving standstill 3min, acquired results is in table 1.
Multiplying power is tested: carry out multiplying power test to the lithium ion battery that comparative example 1,2 and embodiment 1-8 prepare respectively.Battery core is carried out multiplying power test in 35 DEG C of environment, and flow process is: leave standstill 3min; 0.5C constant current charge is to 4.2V, and constant voltage charge is to 0.05C; Leave standstill 3min; 0.2C constant-current discharge obtains discharge capacity D0 first to 3.0V.Leave standstill 3min; 0.5C constant current charge is to 4.2V, and constant voltage charge is to 0.05C; Leave standstill 3min; 2C constant-current discharge obtains discharge capacity D1 first to 3.0V.High rate performance Rate=D1/D0, acquired results is in table 1.
Test as follows the ultracapacitor of embodiment 9: battery core is carried out multiplying power test in 35 DEG C of environment, flow process is: leave standstill 3min; 0.5C constant current charge is to 1V; Leave standstill 3min; 0.5C constant-current discharge obtains discharge capacity D0 first to 0V.Leave standstill 3min; 0.5C constant current charge is to 1V; Leave standstill 3min; 20C constant-current discharge obtains discharge capacity D1 first to 0V.High rate performance Rate=D1/D0, acquired results is in table 1.
Analytical table 1, comparative examples 1 and comparative example 2 can obtain, Graphene can significantly improve battery capacity as during conductive agent, but the high rate performance of battery can be reduced, this is because the Graphene film studio of two-dimensional structure limits lithium ion perpendicular to the transmission on graphene planes, causes battery high rate performance to reduce.Comparative examples 2, embodiment 1-3 can find, when the Graphene as conductive agent is porous graphene, the high rate performance of battery can be improved significantly, particularly when porous graphene pitch of holes 2a or following time, the high rate performance of battery is obviously better than the lithium ion battery of conductive black (comparative example 1) as conductive agent, this is due to the pore space structure on graphene sheet layer, eliminate the restriction that Graphene two dimensional surface spreads lithium ion, thus improve the high rate performance of battery.Comparative example 3-5 can obtain, and the high rate performance impact of bore dia on battery core of loose structure is less.
Table 1, the electrical property table of the electrochemical energy storing device of comparative example and embodiment
Can be obtained by embodiment 9, this invention is also practically applicable to ultracapacitor field, illustrates that the present invention has universality.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change above-mentioned execution mode and revise.Therefore, the present invention is not limited to above-mentioned embodiment, and any apparent improvement of every those skilled in the art done by basis of the present invention, replacement or modification all belong to protection scope of the present invention.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (10)
1. an Anodic electrode, comprise base material and be arranged at the anodic coating on described base material, described anodic coating comprises anode active material, bonding agent and conductive agent, and the average diameter of described anode active material is a, and described conductive agent is at least containing Graphene; It is characterized in that, described Graphene is porous graphene, and the average distance between adjacent hole is b, and b≤10a.
2. an Anodic electrode according to claim 1, is characterized in that, as the equivalent diameter D≤10a of described graphene film layer plane, described Graphene can be atresia Graphene.
3. an Anodic electrode according to claim 1, is characterized in that, described anode active material is at least one in carbon class material, alloy type material, metal oxide series material, metal nitride materials and carbon compound; Described conductive agent is also containing at least one in conductive black, super conductive carbon, carbon nano-tube, conductive carbon fibres peacekeeping Ketjen black.
4. an Anodic electrode according to claim 1, is characterized in that, the thickness of described porous graphene is less than or equal to 350nm, and the slice plane equivalent diameter D of described porous graphene is more than or equal to 5nm; The quality of described Graphene accounts for 0.05% ~ 10% of the gross mass of described anodic coating.
5. an Anodic electrode according to claim 1, is characterized in that, the average diameter d≤a in the hole of described porous graphene; The shape in hole is circle, square, triangle, ellipse or polygon.
6. an Anodic electrode according to claim 1, is characterized in that, the diameter d≤0.1a in the hole of described porous graphene, and the shape in the hole of described porous graphene is identical, area equation, and distance between adjacent hole is equal.
7. an Anodic electrode according to claim 1, is characterized in that, the average distance b≤2a between the adjacent hole of described porous graphene.
8. an Anodic electrode according to claim 1, is characterized in that, 5nm≤a≤500um.
9. an electrochemical energy storing device, comprise the anode electrode described in any one of claim 1 to 8, described electrochemical energy storing device is any one in lead-acid battery, Ni-MH battery, lithium ion battery, lithium-sulfur cell, sodium-ion battery, Zinc ion battery and ultracapacitor.
10. a preparation method for electrochemical energy storing device according to claim 9, is characterized in that, mainly comprises the steps:
Step 1, the preparation of anode pole piece: be that the anode active material of a, the conductive agent at least containing porous graphene, bonding agent and solvent are even by average diameter, obtain anode slurry, be coated in afterwards on base material, cold pressing, itemize, obtain anode pole piece after welding, wherein, the average distance between the adjacent hole of described porous graphene is b, and b≤10a;
Step 2, prepared by finished product battery core: anode pole piece step 1 prepared and cathode sheet, barrier film are assembled and obtained naked battery core, enters shell/enter bag, drying, fluid injection afterwards, leaves standstill, changes into, obtains finished product battery core after shaping.
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Cited By (10)
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| CN105244504A (en) * | 2015-09-15 | 2016-01-13 | 王立军 | Graphene lithium ion battery |
| CN106941169A (en) * | 2017-04-24 | 2017-07-11 | 广东烛光新能源科技有限公司 | A kind of silicon-carbon cathode material and preparation method thereof |
| CN107069011A (en) * | 2017-04-24 | 2017-08-18 | 广东烛光新能源科技有限公司 | A kind of silicon-carbon cathode material and preparation method thereof |
| CN107093720A (en) * | 2017-04-24 | 2017-08-25 | 广东烛光新能源科技有限公司 | A kind of silicon-carbon cathode material and preparation method thereof |
| CN107204447A (en) * | 2017-05-27 | 2017-09-26 | 广东烛光新能源科技有限公司 | A kind of lithium titanate anode material and preparation method thereof |
| CN107240682A (en) * | 2017-05-27 | 2017-10-10 | 广东烛光新能源科技有限公司 | Lithium titanate anode material and preparation method thereof |
| CN108400025A (en) * | 2018-01-18 | 2018-08-14 | 柔电（武汉）科技有限公司 | A kind of preparation method of ultracapacitor |
| CN109841794A (en) * | 2019-03-29 | 2019-06-04 | 宁德新能源科技有限公司 | Electrode plates and electrochemical appliance comprising the electrode plates |
| US11682765B2 (en) | 2019-03-29 | 2023-06-20 | Dongguan Poweramp Technology Limited | Electrode and electrochemical device including the same |
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| US11728474B2 (en) | 2019-03-29 | 2023-08-15 | Dongguan Poweramp Technology Limited | Electrode and electrochemical device including the same |
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