CN107331528A - Multi-layer composite electrode and the lithium ion battery electric capacity using the electrode - Google Patents
Multi-layer composite electrode and the lithium ion battery electric capacity using the electrode Download PDFInfo
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- CN107331528A CN107331528A CN201710514056.2A CN201710514056A CN107331528A CN 107331528 A CN107331528 A CN 107331528A CN 201710514056 A CN201710514056 A CN 201710514056A CN 107331528 A CN107331528 A CN 107331528A
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- 239000002131 composite material Substances 0.000 title claims abstract description 30
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title abstract description 30
- 229910001416 lithium ion Inorganic materials 0.000 title abstract description 30
- 238000000576 coating method Methods 0.000 claims abstract description 71
- 239000011248 coating agent Substances 0.000 claims abstract description 69
- 239000003990 capacitor Substances 0.000 claims abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 43
- 229910052799 carbon Inorganic materials 0.000 claims description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- 239000011149 active material Substances 0.000 claims description 12
- 239000005030 aluminium foil Substances 0.000 claims description 10
- 229910021389 graphene Inorganic materials 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052744 lithium Inorganic materials 0.000 claims description 6
- 239000003610 charcoal Substances 0.000 claims description 5
- KLARSDUHONHPRF-UHFFFAOYSA-N [Li].[Mn] Chemical compound [Li].[Mn] KLARSDUHONHPRF-UHFFFAOYSA-N 0.000 claims description 4
- 239000006104 solid solution Substances 0.000 claims description 4
- 229910052493 LiFePO4 Inorganic materials 0.000 claims description 3
- PFYQFCKUASLJLL-UHFFFAOYSA-N [Co].[Ni].[Li] Chemical compound [Co].[Ni].[Li] PFYQFCKUASLJLL-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 2
- PAMMESUSQVJOMA-UHFFFAOYSA-L [Li].[Mn](=O)(=O)(O)O.[Ni].[Co] Chemical compound [Li].[Mn](=O)(=O)(O)O.[Ni].[Co] PAMMESUSQVJOMA-UHFFFAOYSA-L 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 61
- 239000000463 material Substances 0.000 description 21
- 238000002360 preparation method Methods 0.000 description 18
- 239000011888 foil Substances 0.000 description 16
- 239000003792 electrolyte Substances 0.000 description 11
- 230000005611 electricity Effects 0.000 description 9
- 230000006872 improvement Effects 0.000 description 9
- 239000002904 solvent Substances 0.000 description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 8
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 8
- 229910001290 LiPF6 Inorganic materials 0.000 description 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 8
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 8
- 230000014759 maintenance of location Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000012046 mixed solvent Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 239000006258 conductive agent Substances 0.000 description 7
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- OVAQODDUFGFVPR-UHFFFAOYSA-N lithium cobalt(2+) dioxido(dioxo)manganese Chemical compound [Li+].[Mn](=O)(=O)([O-])[O-].[Co+2] OVAQODDUFGFVPR-UHFFFAOYSA-N 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 239000003973 paint Substances 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- 229910021384 soft carbon Inorganic materials 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 235000019241 carbon black Nutrition 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 229910021385 hard carbon Inorganic materials 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 229910001228 Li[Ni1/3Co1/3Mn1/3]O2 (NCM 111) Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 230000005518 electrochemistry Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- OXHNLMTVIGZXSG-UHFFFAOYSA-N 1-Methylpyrrole Chemical class CN1C=CC=C1 OXHNLMTVIGZXSG-UHFFFAOYSA-N 0.000 description 1
- LLYXJBROWQDVMI-UHFFFAOYSA-N 2-chloro-4-nitrotoluene Chemical compound CC1=CC=C([N+]([O-])=O)C=C1Cl LLYXJBROWQDVMI-UHFFFAOYSA-N 0.000 description 1
- 229910013191 LiMO2 Inorganic materials 0.000 description 1
- 229910002991 LiNi0.5Co0.2Mn0.3O2 Inorganic materials 0.000 description 1
- 229910011328 LiNi0.6Co0.2Mn0.2O2 Inorganic materials 0.000 description 1
- 229910011669 LiNi0.7Co0.2Mn0.1O2 Inorganic materials 0.000 description 1
- 229910015872 LiNi0.8Co0.1Mn0.1O2 Inorganic materials 0.000 description 1
- 229910013467 LiNixCoyMnzO2 Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000001652 electrophoretic deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910000473 manganese(VI) oxide Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/04—Hybrid capacitors
- H01G11/06—Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
-
- 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
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of multi-layer composite electrode and using the lithium ion battery electric capacity of the electrode, the multi-layer composite electrode includes collector, and its both sides is respectively equipped with first electrode coating and second electrode coating；Wherein, successively alternately superposition is constituted by 1~10 layer capacitance layer and 1~10 layer of battery layers for first electrode coating and second electrode coating.The invention also discloses a kind of battery capacitor being made using above-mentioned multi-layer composite electrode.Beneficial effects of the present invention are：The battery component in combination electrode is waved synergy with capacitance group distribution, improve the chemical property of combination electrode；The battery capacitor being made simultaneously using described multi-layer composite electrode, is arranged alternately with battery layers using capacitor layers, can significantly improve capacity, energy density and the power density of lithium ion battery electric capacity.
Description
Technical field
The present invention relates to electrode field, in particular to multi-layer composite electrode and using the lithium ion battery of the electrode
Electric capacity.
Background technology
Lithium ion battery electric capacity is a kind of mixed type electrochemical energy storing device, and its concept is that at least one electrode is compound
Electrode, not only comprising capacitance material but also comprising battery material, the electric double layer absorption of the existing capacitance material of its energy storage mechanism is with being desorbed machine
System, the Lithium-ion embeding and the redox reaction of abjection for having lithium ion battery material again.Ultracapacitor alliance is to lithium ion
The definition of battery capacitor is the component of the existing battery of at least one electrode, there is the component of electric capacity again.Generally, this combination electrode
Preparation be by being sufficiently mixed capacitance material, battery material and conductive agent and binding agent, slurry being made, collector is applied to
On electrode slice is made.The problem of electrode prepared in this way is present is, after battery material is mixed with capacitance material, due to
Both have larger difference by dynamic performance, and the charging and discharging process of capacitance material is more faster than battery material, can cause electricity
The overcharge or overdischarge of capacity materials granule partial film micro area, making the operating voltage of battery capacitor reduces.Therefore, using battery material
Material can not make battery component be played one's part to the full with electric capacity component with the approach that capacitance material is directly mixed.
The content of the invention
To solve the above problems, it is an object of the invention to provide a kind of multi-layer composite electrode and using the electrode lithium from
Sub- battery capacitor, makes the battery component in combination electrode wave synergy with capacitance group distribution, improves the electrochemistry of combination electrode
Performance.
The invention provides a kind of multi-layer composite electrode, the multi-layer composite electrode includes：
Collector, its both sides are respectively equipped with first electrode coating and second electrode coating；Wherein, the first electrode coating
By 1~10 layer capacitance layer and 1~10 layer of battery layers, successively alternately superposition is constituted with the second electrode coating.
As a further improvement on the present invention, the first electrode coating and the second electrode coating are symmetricly set in institute
State the both sides of collector.
As a further improvement on the present invention, the thickness of the capacitor layers is 1~50 μm.
As a further improvement on the present invention, the thickness of the battery layers is 5~50 μm.
As a further improvement on the present invention, the active material of the capacitor layers is porous charcoal or graphene.
As a further improvement on the present invention, the active material of the battery layers be nickle cobalt lithium manganate or nickel cobalt lithium aluminate or
LiFePO4 or cobalt acid lithium or rich lithium manganese base solid solution.
As a further improvement on the present invention, the both sides of the collector are equipped with conductive coating, and conductive coating is distinguished
Between the first electrode coating and the collector and between the second electrode coating and the collector.
As a further improvement on the present invention, the conductive coating is conductive carbon coating, and the thickness of the conductive carbon coating
Spend for 0.1~5 μm.
As a further improvement on the present invention, the collector is aluminium foil or perforated aluminum foil.
Present invention also offers a kind of battery capacitor, it is characterised in that the battery capacitor has used as described above many
Layer combination electrode.
Beneficial effects of the present invention are：First, the battery component in combination electrode is made to wave synergy with capacitance group distribution,
Improve the chemical property of combination electrode；Secondly, the battery capacitor being made using described multi-layer composite electrode, using capacitor layers
It is arranged alternately with battery layers, capacity, energy density and the power density of lithium ion battery electric capacity can be significantly improved.
Brief description of the drawings
Fig. 1 is the structural representation of the multi-layer composite electrode described in the embodiment of the present invention 8；
Fig. 2 is the structural representation of the multi-layer composite electrode described in the embodiment of the present invention 13.
In figure,
1st, collector；2nd, conductive coating；3rd, capacitor layers；4th, battery layers；51st, first electrode coating；52nd, second electrode is applied
Layer.
Embodiment
The present invention is described in further detail below by specific embodiment and with reference to accompanying drawing.
As shown in Figure 1-2, described in the embodiment of the present invention be a kind of multi-layer composite electrode and using the electrode lithium ion
Battery capacitor, the multi-layer composite electrode includes：
Collector 1, its both sides are respectively equipped with first electrode coating 51 and second electrode coating 52；Wherein, first electrode is applied
Successively alternately superposition is constituted by 1~10 layer capacitance layer, 3 and 1~10 layers of battery layers 4 for layer 51 and second electrode coating 52.Capacitor layers
3 energy storage mechanism is that capacitative materials realize energy storage by the absorption and desorption of electrolyte ion；The energy storage mechanism of battery layers 4 is
Battery material inserts embedding and abjection oxidation-reduction reaction by lithium ion and carries out electrochemical energy storage.Capacitor layers 3 and battery layers 4 are handed over
For setting, the battery component in combination electrode is waved synergy with capacitance group distribution, the electrochemistry of combination electrode can be improved
Performance.Avoid the overcharge or overdischarge of capacitance material granule partial film micro area.
Further, first electrode coating 51 and second electrode coating 52 are symmetricly set in the both sides of collector 1.First electricity
Pole coating 51 and second electrode coating 52 not only position symmetrically, while capacitor layers 3 and battery layers 4 in two electrode coatings
Location arrangements are also completely the same, can so ensure the stabilization of multi-layer composite electrode performance.
Further, the thickness of capacitor layers 3 is 1~50 μm.
Further, the thickness of battery layers 4 is 5~50 μm.
The thickness of capacitor layers 3 and battery layers 4 is MULTILAYER COMPOSITE pole coating, dried thickness.
Further, the active material of capacitor layers 3 is porous charcoal or graphene.Porous charcoal refers to that specific surface area is not less than
500m2/ g Carbon Materials, including activated carbon, mesoporous carbon, electrolyte ion is more beneficial for using porous charcoal as capacitance layer materials
Absorption and desorption.Grapheme material has higher specific capacitance and excellent electronic conductivity, can be used as capacitance material
It is used for capacitor layers and battery layers with conductive agent.
Further, the active material of battery layers 4 is nickle cobalt lithium manganate or nickel cobalt lithium aluminate or LiFePO4 or cobalt acid lithium
Or rich lithium manganese base solid solution.Nickle cobalt lithium manganate is also referred to as tertiary cathode material, can use chemical formula LiNixCoyMnzO2Represent, pressed
Crossing metallic element composition difference can be divided into:LiNi1/3Co1/3Mn1/3O2、LiNi0.5Co0.2Mn0.3O2、LiNi0.6Co0.2Mn0.2O2、
LiNi0.7Co0.2Mn0.1O2、LiNi0.8Co0.1Mn0.1O2, NCM111, NCM523, NCM622, NCM721 and NCM811 can be used respectively
Represent.Rich lithium manganese base solid solution can use chemical formula xLi2MnO3·(1-x)LiMO2Represent, wherein, 0<x<1, M=Mn, Co, Ni.
In battery layers 4, addition mass percent is when being not more than 10% graphene, graphene to the contribution of capacity very
Small, the component for being still now battery accounts for leading.When graphene is used for capacitor layers 3 as active material, its capacitive property is played.Compared with
Thin capacitor layers 3 can play a part of collector 1, collect electronics, accelerate electric transmission in electrode；Capacitor layers 3 have higher
Specific surface area and abundant pore structure, more electrolyte can be adsorbed, be conducive to transporting for lithium ion；Electrode it is forthright again
Can be very big with the thickness relationships of battery layers 4, the thinner high rate performance of electrode is better, can shorten lithium ion diffusion length.
Further, the both sides of collector 1 are equipped with conductive coating 2, and conductive coating 2 is respectively arranged on first electrode coating
Between 51 and collector 1 and between second electrode coating 52 and collector 1.Conductive coating 2 to the contribution of the capacity of electric capacity very
Small, main function is the electronic conductivity for improving electrode, reduces the polarization electricity between battery layers 4 or capacitor layers 3 and collector 1
Resistance.Method electrically-conducting paint being applied on collector 1 includes nick version printing, spraying coating, extrusion coated, electrophoretic deposition.
Slurry is applied to prepared on collector 1 pole piece method include nick version printing, spraying coating, extrusion coated, transfer type apply
Cloth.Described electrically-conducting paint or slurry can use known formulations or commercial goods.
Further, conductive coating 2 is conductive carbon coating, and the thickness of conductive carbon coating is 0.1~5 μm.Conductive coating
2nd, conductive agent is contained in battery layers 4 and capacitor layers 3, conductive carbon black, electrically conductive graphite, CNT, graphene may be selected in conductive agent
In one or more.
Further, collector 1 is aluminium foil or perforated aluminum foil.The main function of collector 1 is provided for electrochemical reaction
Electron channel, accelerates electric charge transfer, reduces activation polarization, improves discharge and recharge coulombic efficiency, and seldom participates in the embedding de- anti-of lithium
Should.There is no obvious corrosion phenomenon when aluminium foil is as plus plate current-collecting body, while its polarization current is also smaller and stably, embedding lithium holds
Amount is also minimum, therefore is used as collector 1 from aluminium foil.
The preparation of the collector 1 of embodiment 1
Collector 1 is aluminium foil in the present embodiment and conductive coating 2 is conductive carbon coating.Using the method for spraying coating in aluminium
The electrically-conducting paint EB-815 of Henkel KGaA company production is coated with paper tinsel, carbon-coated aluminum foils are made, the thickness of conductive carbon coating is 1 μm,
Conductive agent in the coating is electrically conductive graphite.
The preparation of the collector 1 of embodiment 2
Collector 1 is aluminium foil in the present embodiment and conductive coating 2 is conductive carbon coating.Method using nick version printing exists
The electrically-conducting paint EB-012 of Henkel KGaA company production is coated with aluminium foil, carbon-coated aluminum foils are made, coating layer thickness is 5 μm, the coating
In conductive agent be electrically conductive graphite.
The preparation of the collector 1 of embodiment 3
Collector 1 is aluminium foil in the present embodiment and conductive coating 2 is conductive carbon coating.Using the method for electrophoresis in aluminium foil table
Face deposit thickness is 0.1 μm of graphene, and carbon-coated aluminum foils are made.
The preparation of the collector 1 of embodiment 4
Collector 1 is perforated aluminum foil in the present embodiment and conductive coating 2 is conductive carbon coating.By the conductive carbon of 45 mass parts
The black, CNT of 45 mass parts, the Kynoar of 10 mass parts are well mixed in 1-METHYLPYRROLIDONE and conduction are made
Coating, uses the mode of extrusion coated to be applied in perforated aluminum foil and thickness is made for 2 μm of carbon-coated aluminum foils.The specification of perforated aluminum foil
For：Percent opening is 25%, and aperture size is 100 μm, and the perforated aluminum foil that embodiment described later is used employs this specification.
In the present invention, Kynoar is binding agent, and 1-METHYLPYRROLIDONE is solvent.
The preparation of the collector 1 of embodiment 5
Collector 1 is perforated aluminum foil in the present embodiment and conductive coating 2 is conductive carbon coating.By the conductive carbon of 60 mass parts
The black, graphene of 30 mass parts, the Kynoar of 10 mass parts are well mixed in 1-METHYLPYRROLIDONE and conductive painting are made
Material, uses the mode of extrusion coated to be applied in perforated aluminum foil and thickness is made for 2 μm of carbon-coated aluminum foils.
The preparation of the collector 1 of embodiment 6
Collector 1 is perforated aluminum foil in the present embodiment and conductive coating 2 is conductive carbon coating.By the graphene of 90 mass parts
It is well mixed with the Kynoar of 10 mass parts in 1-METHYLPYRROLIDONE and electrically-conducting paint is made, using the side of extrusion coated
Formula is applied to the carbon-coated aluminum foils for being made that thickness is 2 μm in perforated aluminum foil.
The preparation of embodiment 7-17 multi-layer composite electrodes
By 80 mass parts battery active materials, 10 mass parts conductive carbon blacks and 10 mass parts Kynoar in N- methyl pyrroles
It is well mixed in pyrrolidone and cell size is made.By 80 mass parts electric capacity active materials, 10 mass parts conductive carbon blacks and 10 mass
Part Kynoar is well mixed in 1-METHYLPYRROLIDONE is made electric capacity slurry.Cell size and electric capacity slurry are alternately applied
Cloth includes nick version printing, spraying coating, extrusion coated and transfer type and applied to pole piece, adoptable method is prepared on collector
Cloth.The active material of battery layers 4 and capacitor layers 3 is shown in Table 1 with conductive agent and thickness with the number of plies.The electricity of first electrode coating 51 and second
Pole coating 52 is arranged in the both sides of collector 1, is arranged symmetrically relative to collector 1.Battery layers 4 and afflux in embodiment 7
Body 1 is directly contacted, and capacitor layers 4 are directly contacted with collector 1 in embodiment 8-17.
The preparation of the embodiment 7-17 multi-layer composite electrodes of table 1
For embodiment 13, conventional art is by 80 mass parts active materials, 10 mass parts conductive carbon blacks and 10 mass parts
Kynoar is well mixed in 1-METHYLPYRROLIDONE and slurry is made, on the collector 1 for being applied to the preparation of embodiment 2, system
Standby composite pole piece (case as a comparison).The activated carbon that active material is included and nickle cobalt lithium manganate NCM523 volume ratio are 2：3,
Now, comparative example 1 contains the activated carbon and nickle cobalt lithium manganate NCM523 of identical mass parts with embodiment 13, and the face of both pole pieces is close
Degree is also identical, and difference is to employ the technique for directly directly mixing activated carbon and nickle cobalt lithium manganate NCM523.Implement
Example 13 all increases compared with the electrode performance in conventional art.
The present embodiment is also prepared for a kind of battery capacitor, and the battery capacitor has used multilayer prepared in embodiment 1-17
Combination electrode.
The preparation of the lithium ion battery electric capacity of embodiment 18
Lithium ion battery electric capacity is prepared using the positive pole prepared by hard carbon cathode and embodiment 12, both positive and negative polarity Capacity Ratio is 1:
1, electrolyte is 1mol/L LiPF6Solution, solvent is that volume ratio is 1:1:1 ethylene carbonate, dimethyl carbonate and carbonic acid
The mixed solvent of diethylester.Voltage window is 2.0-4.2V, and energy density is 40Wh/kg, and power density is 5kW/kg, discharge and recharge
It is 95% to circulate capability retention after 5000 weeks.
The preparation of the lithium ion battery electric capacity of embodiment 19
Lithium ion battery electric capacity is prepared using the positive pole prepared by hard carbon cathode and embodiment 13, both positive and negative polarity Capacity Ratio is 1:
1, electrolyte is 1mol/L LiPF6Solution, solvent is that volume ratio is 1:1:1 ethylene carbonate, dimethyl carbonate and carbonic acid
The mixed solvent of diethylester.Voltage window is 2.0-4.2V, and energy density is 80Wh/kg, and power density is 3.5kW/kg, charge and discharge
Capability retention is 96% after electricity is circulated 5000 weeks.
The preparation of the lithium ion battery electric capacity of embodiment 20
Lithium ion battery electric capacity is prepared using the positive pole prepared by hard carbon cathode and comparative example 1, both positive and negative polarity Capacity Ratio is 1:
1, electrolyte is 1mol/L LiPF6Solution, solvent is that volume ratio is 1:1:1 ethylene carbonate, dimethyl carbonate and carbonic acid
The mixed solvent of diethylester.Voltage window is 2.0-4.0V, and energy density is 50Wh/kg, and power density is 2kW/kg, discharge and recharge
It is 85% to circulate capability retention after 5000 weeks.
The preparation of the lithium ion battery electric capacity of embodiment 21
Lithium ion battery electric capacity is prepared using the positive pole prepared by soft carbon negative pole and embodiment 13, both positive and negative polarity Capacity Ratio is 1:
1, electrolyte is 1mol/L LiPF6Solution, solvent is that volume ratio is 1:1:1 ethylene carbonate, dimethyl carbonate and carbonic acid
The mixed solvent of diethylester.Voltage window is 2.0-4.2V, and energy density is 85Wh/kg, and power density is 3kW/kg, discharge and recharge
It is 96% to circulate capability retention after 5000 weeks.
The preparation of the lithium ion battery electric capacity of embodiment 22
Lithium ion battery electric capacity is prepared using the positive pole prepared by graphite cathode and embodiment 13, both positive and negative polarity Capacity Ratio is 1:
1, electrolyte is 1mol/L LiPF6Solution, solvent is that volume ratio is 1:1:1 ethylene carbonate, dimethyl carbonate and carbonic acid
The mixed solvent of diethylester.Voltage window is 2.0-4.2V, and energy density is 78Wh/kg, and power density is 2.3kW/kg, charge and discharge
Capability retention is 86% after electricity is circulated 5000 weeks.
The preparation of the lithium ion battery electric capacity of embodiment 23
Lithium ion battery electric capacity is prepared using the positive pole prepared by soft carbon negative pole and embodiment 14, both positive and negative polarity Capacity Ratio is 1:
1, electrolyte is 1mol/L LiPF6Solution, solvent is that volume ratio is 1:1:1 ethylene carbonate, dimethyl carbonate and carbonic acid
The mixed solvent of diethylester.Voltage window is 2.0-4.2V, and energy density is 80Wh/kg, and power density is 7.5kW/kg, charge and discharge
Capability retention is 95% after electricity is circulated 5000 weeks.
The preparation of the lithium ion battery electric capacity of embodiment 24
Lithium ion battery electric capacity is prepared using the positive pole prepared by soft carbon negative pole and embodiment 15, both positive and negative polarity Capacity Ratio is 1:
1, electrolyte is 1mol/L LiPF6Solution, solvent is that volume ratio is 1:1:1 ethylene carbonate, dimethyl carbonate and carbonic acid
The mixed solvent of diethylester.Voltage window is 2.0-4.2V, and energy density is 82Wh/kg, and power density is 5.5kW/kg, charge and discharge
Capability retention is 90% after electricity is circulated 5000 weeks.
The preparation of the lithium ion battery electric capacity of embodiment 25
Lithium ion battery electric capacity is prepared using the positive pole prepared by soft carbon negative pole and embodiment 16, both positive and negative polarity Capacity Ratio is 1:
1, electrolyte is 1mol/L LiPF6Solution, solvent is that volume ratio is 1:1:1 ethylene carbonate, dimethyl carbonate and carbonic acid
The mixed solvent of diethylester.Voltage window is 2.0-4.2V, and energy density is 140Wh/kg, and power density is 3kW/kg, charge and discharge
Capability retention is 93% after electricity is circulated 5000 weeks.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. multi-layer composite electrode, it is characterised in that including：
Collector (1), its both sides are respectively equipped with first electrode coating (51) and second electrode coating (52)；
Wherein, the first electrode coating (51) and the second electrode coating (52) by 1~10 layer capacitance layer (3) and 1~
Successively alternately superposition is constituted 10 layers of battery layers (4).
2. multi-layer composite electrode according to claim 1, it is characterised in that the first electrode coating (51) and described
Two electrode coatings (52) are symmetricly set in the both sides of the collector (1).
3. multi-layer composite electrode according to claim 1, it is characterised in that the thickness of the capacitor layers (3) is 1~50 μ
m。
4. multi-layer composite electrode according to claim 1, it is characterised in that the thickness of the battery layers (4) is 5~50 μ
m。
5. multi-layer composite electrode according to claim 1, it is characterised in that the active material of the capacitor layers (3) is many
Hole charcoal or graphene.
6. multi-layer composite electrode according to claim 1, it is characterised in that the active material of the battery layers (4) is nickel
Cobalt manganic acid lithium or nickel cobalt lithium aluminate or LiFePO4 or cobalt acid lithium or rich lithium manganese base solid solution.
7. multi-layer composite electrode according to claim 1, it is characterised in that the both sides of the collector (1), which are equipped with, leads
Electrocoat (2), and conductive coating (2) is respectively arranged between the first electrode coating (51) and the collector (1) and institute
State between second electrode coating (52) and the collector (1).
8. multi-layer composite electrode according to claim 7, it is characterised in that the conductive coating (2) is conductive carbon coating,
And the thickness of the conductive carbon coating is 0.1~5 μm.
9. multi-layer composite electrode according to claim 1, it is characterised in that the collector (1) is aluminium foil or perforation aluminium
Paper tinsel.
10. a kind of battery capacitor, it is characterised in that the battery capacitor has been used as described in any one in claim 1 to 9
Multi-layer composite electrode.
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| CN112820878A (en) * | 2019-11-15 | 2021-05-18 | 通用汽车环球科技运作有限责任公司 | Capacitor assisted gradient electrode |
| CN114614019A (en) * | 2020-12-04 | 2022-06-10 | 通用汽车环球科技运作有限责任公司 | Asymmetric hybrid electrode for capacitor-assisted batteries |
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