CN102945754B - Super electrochemical capacitor and preparation method thereof - Google Patents
Super electrochemical capacitor and preparation method thereof Download PDFInfo
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- CN102945754B CN102945754B CN201110233239.XA CN201110233239A CN102945754B CN 102945754 B CN102945754 B CN 102945754B CN 201110233239 A CN201110233239 A CN 201110233239A CN 102945754 B CN102945754 B CN 102945754B
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- 239000003990 capacitor Substances 0.000 title claims abstract description 73
- 238000002360 preparation method Methods 0.000 title claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000011230 binding agent Substances 0.000 claims abstract description 28
- 239000006258 conductive agent Substances 0.000 claims abstract description 27
- 239000011258 core-shell material Substances 0.000 claims abstract description 25
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 25
- 239000007774 positive electrode material Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 17
- 239000005030 aluminium foil Substances 0.000 claims abstract description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011889 copper foil Substances 0.000 claims abstract description 12
- 239000003792 electrolyte Substances 0.000 claims description 29
- 230000004888 barrier function Effects 0.000 claims description 21
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 11
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 11
- -1 polytetrafluoroethylene Polymers 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 8
- 239000002070 nanowire Substances 0.000 claims description 8
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 5
- 229910013063 LiBF 4 Inorganic materials 0.000 claims description 5
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 14
- 239000004408 titanium dioxide Substances 0.000 abstract description 7
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 239000002041 carbon nanotube Substances 0.000 description 10
- 229910021393 carbon nanotube Inorganic materials 0.000 description 10
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 9
- 239000002033 PVDF binder Substances 0.000 description 7
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 239000006230 acetylene black Substances 0.000 description 5
- 239000011356 non-aqueous organic solvent Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 239000007772 electrode material Substances 0.000 description 4
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 3
- 229910013188 LiBOB Inorganic materials 0.000 description 3
- 229910013870 LiPF 6 Inorganic materials 0.000 description 3
- SIXOAUAWLZKQKX-UHFFFAOYSA-N carbonic acid;prop-1-ene Chemical compound CC=C.OC(O)=O SIXOAUAWLZKQKX-UHFFFAOYSA-N 0.000 description 3
- 239000002001 electrolyte material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- WDXYVJKNSMILOQ-UHFFFAOYSA-N 1,3,2-dioxathiolane 2-oxide Chemical compound O=S1OCCO1 WDXYVJKNSMILOQ-UHFFFAOYSA-N 0.000 description 2
- SJHAYVFVKRXMKG-UHFFFAOYSA-N 4-methyl-1,3,2-dioxathiolane 2-oxide Chemical compound CC1COS(=O)O1 SJHAYVFVKRXMKG-UHFFFAOYSA-N 0.000 description 2
- 229910015015 LiAsF 6 Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000009831 deintercalation Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- KKQAVHGECIBFRQ-UHFFFAOYSA-N methyl propyl carbonate Chemical compound CCCOC(=O)OC KKQAVHGECIBFRQ-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 2
- 229910002986 Li4Ti5O12 Inorganic materials 0.000 description 1
- 229910002640 NiOOH Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910010455 TiO2 (B) Inorganic materials 0.000 description 1
- 239000006183 anode active material Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006182 cathode active material Substances 0.000 description 1
- 230000004087 circulation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- Y02E60/13—Energy storage using capacitors
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The invention belongs to capacitor area, it discloses a kind of super electrochemical capacitor electrode and super electrochemical capacitor; This super electrochemical capacitor electrode comprises positive pole and negative pole; The material of positive pole comprises aluminium foil and the mass ratio be coated on aluminium foil be respectively 85: 10: 5 Graphene, the first conductive agent and the first binding agent composition positive electrode active materials; The material of negative pole comprises aluminium foil and the mass ratio be coated on Copper Foil be respectively 85: 10: 5 titanium dioxide nano thread, the second conductive agent and the second binding agent composition negative active core-shell material.The invention provides super electrochemical capacitor electrode, its negative material has low potential plateau, and positive pole have employed specific area is higher, conductivity is excellent Graphene, it can effectively reduce the internal resistance of overall super electrochemical capacitor, can make again the ratio capacitance that the formation of super electrochemical capacitor is higher.
Description
Technical field
The invention belongs to capacitor area, it relates to a kind of super electrochemical capacitor.The invention still further relates to a kind of preparation method of this super electrochemical capacitor.
Background technology
The nineties in 20th century, the exploitation to electric automobile and the demand to pulse power supply, more have stimulated the research of people to electrochemical capacitor.The specific energy of current electrochemical capacitor is still lower, and the specific power of battery is lower, people are just attempting to address this problem from two aspects: (1), by battery and ultracapacitor conbined usage, when normally working, provides required power by battery; When starting or need heavy-current discharge, then provided by capacitor, the shortcoming that the cryogenic property of battery is bad can be improved on the one hand; The application scenario for the higher pulse current of power requirement can be solved, as GSM, GPRS etc.Capacitor and battery conbined usage can extend the life of a cell, but this will increase the annex of battery, disagree with the developing direction such as short and small frivolous of current energy device.(2) utilize the principle of electrochemical capacitor and battery, exploitation mixed capacitor is as new energy storage unit.
Nineteen ninety Giner company is proposed the so-called pseudocapacitors or title pseudocapacitor (Pseudo-capacitor) that metal oxide containing precious metals is electrode material.For improving the specific energy of electrochemical capacitor further, nineteen ninety-five, D.A.Evans etc. propose and ideal polarized electrode and faraday's reaction electrode are combined the concept (ElectrochemicalHybridCapacitor, EHC or be called Hybridcapacitor) forming mixed capacitor.1997, ESMA company disclosed the concept of NiOOH/AC mixed capacitor, disclosed the new technology of accumulator material and electrochemical capacitor combination of materials.Calendar year 2001, G.G.Amatucci reports the Li4Ti5O12/AC electrochemical mixed capacitor of organic system lithium ion battery material and active carbon combination, is another milestone of electrochemical mixed capacitor development.
At present with TiO2 (B) nano wire for negative pole, carbon nano-tube (CNT) is positive pole, mixed capacitor is assembled in 1mol/LLiPF6/EC-DMC-DEC electrolyte, this system can carry out good charge and discharge cycles in 0-2.8V voltage range, under 10C multiplying power, energy density reaches 12.8wh/kg, is the twice of symmetric form CNT//CNT capacitor.Although this system make use of the advantage of monodimension nanometer material, because the capacity of carbon nano-tube is lower, cause the total energy density of this system not to be very high, make capacitor energy density low, cause the ratio capacitance of capacitor low.
Summary of the invention
The object of the present invention is to provide the super electrochemical capacitor that a kind of energy density is high, ratio capacitance is high.
A kind of super electrochemical capacitor, comprises positive pole, negative pole, barrier film between described positive pole and negative pole and electrolyte; Described positive pole, negative pole and barrier film are immersed in described electrolyte; Wherein, the material of described positive pole comprise aluminium foil and the mass ratio be coated on described aluminium foil be respectively 80 ~ 93: 2 ~ 10: 5 ~ 10 Graphene, the first conductive agent and the first binding agent composition positive electrode active materials; The material of described negative pole comprises aluminium foil and the mass ratio be coated on described Copper Foil be respectively 80 ~ 93: 2 ~ 10: 5 ~ 10 titanium dioxide nano thread, the second conductive agent and the second binding agent composition negative active core-shell material.
In above-mentioned super electrochemical capacitor, the mass ratio of described positive electrode active materials and described negative active core-shell material is 1: 1 ~ 1: 5.
In above-mentioned super electrochemical capacitor, electrode material or electrolyte material as follows:
Described Graphene is specific area is 400 ~ 1000m
2the Graphene of/g;
Described first conductive agent and the second conductive agent are acetylene black, conductive black or carbon nano-tube, and these conductive agents all can be bought by market and obtain;
Described first binding agent and the second binding agent are Kynoar (PVDF) or polytetrafluoroethylene (PTFE);
Described electrolyte is that lithium-ion electrolyte salt and Non-aqueous Organic Solvents are formulated;
Described barrier film adopts pp barrier film.
Another object of the present invention is to the preparation method providing above-mentioned super electrochemical capacitor, its step is as follows:
S1, the Graphene, the first conductive agent and the first binding agent that mass ratio are respectively 80 ~ 93: 2 ~ 10: 5 ~ 10 are configured to positive electrode active materials, and the titanium dioxide nano thread, the second conductive agent and the second binding agent that mass ratio are respectively 80 ~ 93: 2 ~ 10: 5 ~ 10 are configured to negative active core-shell material;
S2, described positive electrode active materials is coated on aluminium foil, after drying process, obtained positive pole; Described negative active core-shell material is coated on Copper Foil, after drying process, obtained negative pole;
S3, described positive pole, negative pole and barrier film are cut into required specification after rearmountedly enter to be equipped with in the container of electrolyte according to the order assembling of positive pole/barrier film/negative pole, obtain described super electrochemical capacitor.
In above-mentioned preparation method, in step S2, the mass ratio of described positive electrode active materials and described negative active core-shell material is 1: 1 ~ 1: 5.
The invention provides super electrochemical capacitor, its negative material has low potential plateau, make the average working voltage of super electrochemical capacitor higher than traditional double electric layer capacitor, again due to the chemical energy that embedding-deintercalation mechanism produces, thus make the energy density of system increase; And positive pole have employed specific area is higher, conductivity is excellent Graphene, it can effectively reduce the internal resistance of overall super electrochemical capacitor, can make again the ratio capacitance that the formation of super electrochemical capacitor is higher; The grapheme material that positive pole adopts has good conductivity, the internal resistance of overall super electrochemical capacitor can be effectively reduced, make the power density of hybrid super electrochemical capacitor comparatively electric double layer capacitance reduces not to be too many, simultaneously can keep good cycle life.
Accompanying drawing explanation
Fig. 1 is super electrochemical capacitor structural representation of the present invention;
Fig. 2 is preparation technology's flow chart of super electrochemical capacitor of the present invention.
Embodiment
A kind of super electrochemical capacitor, as shown in Figure 1, comprise positive pole 6, negative pole 7, barrier film 3 between described positive pole 6 and negative pole 7 and electrolyte 8, described positive pole 6, negative pole 7, barrier film 3 are assembled according to positive pole 6/ barrier film 3/ negative pole 7 order and are rearmountedly entered to fill in the container 9 of electrolyte 8; The material of positive pole 6 comprises aluminium foil 1 and the mass ratio be coated on described aluminium foil 1 be respectively 80 ~ 93: 2 ~ 10: 5 ~ 10 Graphene, the first conductive agent and the first binding agent composition positive electrode active materials 2; The material of negative pole 7 comprises Copper Foil 5 and the mass ratio be coated on described Copper Foil 5 be respectively 80 ~ 93: 2 ~ 10: 5 ~ 10 titanium dioxide nano thread, the second conductive agent and the second binding agent composition negative active core-shell material 4.
In above-mentioned super electrochemical capacitor, the mass ratio of described positive electrode active materials and described negative active core-shell material is 1: 1 ~ 1: 5.
In above-mentioned super electrochemical capacitor, electrode material or electrolyte material as follows:
Graphene is specific area is 400 ~ 1000m
2the Graphene of/g, also can select the Graphene carrying out surface modification, e.g., carries out the surface modified graphite alkene of the elements such as doping B, N, O, F;
First conductive agent and the second conductive agent are acetylene black, conductive black (e.g., conductive black superP) or carbon nano-tube, and these conductive agents all can be bought by market and obtain;
First binding agent and the second binding agent are Kynoar (PVDF) or polytetrafluoroethylene (PTFE);
Titanium dioxide nano thread is titanium dioxide (B) nano wire, i.e. TiO
2(B) nano wire;
Described electrolyte is the formulated electrolyte of lithium-ion electrolyte salt and Non-aqueous Organic Solvents; Lithium-ion electrolyte salt in electrolyte is LiPF
6, LiBF
4, LiBOB, LiCF
3sO
3, LiN (SO
2cF
3) or LiAsF
6in one or more, the Non-aqueous Organic Solvents in electrolyte is one or more in dimethyl carbonate, diethyl carbonate, propene carbonate, ethylene carbonate, ethylene sulfite, propylene sulfite, butylene, r-butyrolactone, methyl ethyl carbonate alkene ester, methyl propyl carbonate, ethyl acetate or acetonitrile;
Described barrier film can adopt pp barrier film.
Another object of the present invention is to the preparation method that above-mentioned super electrochemical capacitor is provided, as shown in Figure 2, comprise step as follows:
S1, the Graphene, the first conductive agent and the first binding agent that mass ratio are respectively 80 ~ 93: 2 ~ 10: 5 ~ 10 are configured to positive electrode active materials, and the titanium dioxide nano thread, the second conductive agent and the second binding agent that mass ratio are respectively 80 ~ 93: 2 ~ 10: 5 ~ 10 are configured to negative active core-shell material;
S2, described positive electrode active materials is coated on aluminium foil, after drying process, obtained positive pole; Described negative active core-shell material is coated on Copper Foil, after drying process, obtained negative pole;
S3, described positive pole, negative pole and barrier film are cut into required specification after cut into required specification and rearmountedly enter to be equipped with in the container of electrolyte according to the order assembling of positive pole/barrier film/negative pole, obtain described super electrochemical capacitor.
In above-mentioned preparation method, in step S2, the mass ratio of described positive electrode active materials and described negative active core-shell material is 1: 1 ~ 1: 5.
In the preparation method of above-mentioned super electrochemical capacitor, electrode material, electrolyte material are as follows:
Graphene is specific area is 400 ~ 1000m
2the Graphene of/g, also can select the Graphene carrying out surface modification, e.g., carries out the surface modified graphite alkene of the elements such as doping B, N, O, F;
First conductive agent and the second conductive agent are acetylene black, conductive black (e.g., conductive black superP) or carbon nano-tube, and these conductive agents all can be bought by market and obtain;
First binding agent and the second binding agent are Kynoar (PVDF) or polytetrafluoroethylene (PTFE);
Described electrolyte is the formulated electrolyte of lithium-ion electrolyte salt and Non-aqueous Organic Solvents; Lithium-ion electrolyte salt in electrolyte is LiPF
6, LiBF
4, LiBOB, LiCF
3sO
3, LiN (SO
2cF
3) or LiAsF
6in one or more, the Non-aqueous Organic Solvents in electrolyte is one or more in dimethyl carbonate, diethyl carbonate, propene carbonate, ethylene carbonate, ethylene sulfite, propylene sulfite, butylene, r-butyrolactone, methyl ethyl carbonate alkene ester, methyl propyl carbonate, ethyl acetate or acetonitrile;
Barrier film can adopt pp barrier film.
The invention provides super electrochemical capacitor, adopt ion to embed a deintercalation mechanism to coordinate to be combined in an energy storage capacitor with the layer mechanism of ultra-capacitor, its negative material has low potential plateau, make the average working voltage of super electrochemical capacitor higher than traditional double electric layer capacitor, thus make the energy density of system increase; And positive pole have employed specific area is higher, conductivity is excellent Graphene, it can effectively reduce the internal resistance of overall super electrochemical capacitor, can make again the ratio capacitance that the formation of super electrochemical capacitor is higher; The grapheme material that positive pole adopts has good conductivity, the internal resistance of overall super electrochemical capacitor can be effectively reduced, make the power density of hybrid super electrochemical capacitor comparatively electric double layer capacitance reduces not to be too many, simultaneously can keep good cycle life.
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in further detail.
Embodiment 1
1, super electrochemical capacitor electrode preparation:
Positive pole.By mass ratio be 85: 10: 5 Graphene (specific area is 400m
2/ g), acetylene black conductor, PVDF binding agent mixing after make positive electrode active materials, positive electrode active materials is coated on aluminium foil, in vacuum 80 DEG C baking 12h, obtain positive pole;
Negative pole.Be the TiO of 85: 10: 5 by mass ratio
2(B) make negative active core-shell material after nano wire, acetylene black conductor, the mixing of PVDF binding agent, be coated on by negative active core-shell material on Copper Foil, in vacuum, 80 DEG C of baking 12h, obtain negative pole.
Wherein, the mass ratio of the positive electrode active materials on positive pole and the negative active core-shell material on negative pole is 1: 1.
2, super electrochemical capacitor is assembled:
Above-mentioned obtained positive pole and annex are cut into required specification, and in glove box, assemble according to the order of positive pole/pp barrier film/negative pole, inject LiPF
6, propene carbonate and diethyl carbonate electrolyte, obtain super electrochemical capacitor.
Embodiment 2
1, super electrochemical capacitor electrode preparation:
Positive pole.By mass ratio be 80: 10: 10 Graphene (specific area is 700m
2/ g), carbon nanotube conducting agent, PVDF binding agent mixing after make positive electrode active materials, positive electrode active materials is coated on aluminium foil, in vacuum 80 DEG C baking 12h, obtain positive pole;
Negative pole.Be the TiO of 80: 10: 10 by mass ratio
2(B) make negative active core-shell material after nano wire, carbon nanotube conducting agent, the mixing of PVDF binding agent, be coated on by negative active core-shell material on Copper Foil, in vacuum, 80 DEG C of baking 12h, obtain negative pole.
Wherein, the mass ratio of the positive electrode active materials on positive pole and the negative active core-shell material on negative pole is 1: 2.
2, super electrochemical capacitor is assembled:
Above-mentioned obtained positive pole and annex are cut into required specification, and in glove box, assemble according to the order of positive pole/pp barrier film/negative pole, inject LiBOB and acetonitrile electrolyte, obtain super electrochemical capacitor.
Embodiment 3
1, super electrochemical capacitor electrode preparation:
Positive pole.By mass ratio be 93: 2: 5 Graphene (specific area is 1000m
2/ g), conductive black conductive agent, PTFE binding agent mixing after make positive electrode active materials, positive electrode active materials is coated on aluminium foil, in vacuum 80 DEG C baking 12h, obtain positive pole;
Negative pole.Be the TiO of 93: 2: 5 by mass ratio
2(B) make negative active core-shell material after nano wire, conductive black superP conductive agent, the mixing of PTFE binding agent, be coated on by negative active core-shell material on Copper Foil, in vacuum, 80 DEG C of baking 12h, obtain negative pole.
Wherein, the mass ratio of the positive electrode active materials on positive pole and the negative active core-shell material on negative pole is 1: 5.
2, super electrochemical capacitor is assembled:
Positive pole and annex are cut into required specification, and in glove box, assemble according to the order of positive pole/pp barrier film/negative pole, inject LiBF
4, dimethyl carbonate and ethylene carbonate electrolyte, obtain super electrochemical capacitor.
The super electrochemical capacitor that above embodiment 1 ~ 3 is assembled into is carried out constant current charge-discharge test, and the different energy density obtained and cycle life, as table 1; The more existing commercial capacitor of battery energy density improves a lot.The energy density of current commercial maxwell ultracapacitor BCAP0350E270T09 is 5.62Wh/kg, and the energy density of other model is 1.38 ~ 5.62Wh/kg.
Table 1
| Embodiment | Anode and cathode active materials mass ratio | Energy density (Wh/kg) | Capacity retention after 1000 circulations |
| 1 | 1∶1 | 30 | 99％ |
| 2 | 1∶2 | 33 | 99％ |
| 3 | 1∶5 | 38 | 99％ |
Should be understood that, the above-mentioned statement for present pre-ferred embodiments is comparatively detailed, and therefore can not think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (2)
1. a super electrochemical capacitor, comprises positive pole, negative pole, barrier film between described positive pole and negative pole and electrolyte; Described positive pole, negative pole and barrier film are immersed in described electrolyte; It is characterized in that, the material of described positive pole comprises aluminium foil and the mass ratio be coated on described aluminium foil is respectively the positive electrode active materials of the Graphene of 93:2:5, the first conductive agent and the first binding agent composition; The material of described negative pole comprises Copper Foil and the mass ratio be coated on described Copper Foil is respectively the TiO of 93:2:5
2the negative active core-shell material of-B nano wire, the second conductive agent and the second binding agent composition;
Described electrolyte is LiBF
4, dimethyl carbonate and the formulated electrolyte of ethylene carbonate;
The mass ratio of described positive electrode active materials and described negative active core-shell material is 1:5;
Described Graphene is specific area is 1000m
2the Graphene of/g; Described first conductive agent and the second conductive agent are conductive black; Described first binding agent and the second binding agent are polytetrafluoroethylene.
2. a preparation method for super electrochemical capacitor, is characterized in that, comprises the steps:
S1, be the Graphene of 93:2:5 by mass ratio, conductive black conductive agent, make positive electrode active materials after the mixing of polytetrafluoroethylene binding agent, be coated on by positive electrode active materials on aluminium foil, in vacuum, 80 DEG C of baking 12h, obtain positive pole, wherein, Graphene is specific area is 1000m
2the Graphene of/g;
S2, be the TiO of 93:2:5 by mass ratio
2make negative active core-shell material after the mixing of-B nano wire, conductive black conductive agent, polytetrafluoroethylene binding agent, be coated on by negative active core-shell material on Copper Foil, in vacuum, 80 DEG C of baking 12h, obtain negative pole;
S3, positive pole and negative pole are cut into required specification, and in glove box, assemble according to the order of positive pole/pp barrier film/negative pole, inject LiBF
4, dimethyl carbonate and ethylene carbonate electrolyte, obtain super electrochemical capacitor;
Wherein, the mass ratio of the positive electrode active materials on positive pole and the negative active core-shell material on negative pole is 1:5.
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| CN103413692B (en) * | 2013-08-25 | 2017-03-15 | 中国科学院青岛生物能源与过程研究所 | A kind of lithium ion capacitor anode plate and the lithium-ion capacitor using the positive plate |
| CN105336507A (en) * | 2014-08-06 | 2016-02-17 | 上海华东电信研究院 | Positive material for super capacitor, preparation method of positive material and super capacitor employing positive material |
| CN105448529A (en) * | 2014-08-06 | 2016-03-30 | 上海华东电信研究院 | Super capacitor positive electrode material and preparation method thereof, and super capacitor by adoption of positive material |
| CN110246699A (en) * | 2019-05-17 | 2019-09-17 | 中国科学院电工研究所 | A kind of anode electrode piece of lithium-ion capacitor, lithium-ion capacitor and its cathode pre-embedding lithium method |
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| CN101840792A (en) * | 2009-03-16 | 2010-09-22 | 清华大学 | Hybrid super capacitor and manufacture method thereof |
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| Supercapacitor devices based on graphene materials;Yan Wang, et al;《J. Phys. Chem. C》;20090607;第113卷;文章第1页第2栏第3-13行，第2页2.2 Fabrication of supercapacitor electrodes以及Figure 1 * |
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