CN109524653A - A method of lithium-ion capacitor specific capacity is promoted using conducting polymer - Google Patents
A method of lithium-ion capacitor specific capacity is promoted using conducting polymer Download PDFInfo
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Abstract
A method of lithium-ion capacitor specific capacity is promoted using conducting polymer, anode sizing agent and negative electrode slurry are first made respectively, anode sizing agent is coated on again on the tow sides of positive pole aluminium foil piece, negative electrode slurry is coated on the tow sides of cathode aluminium foil, through drying, roll, be punched after obtain anode pole piece and cathode pole piece；Battery core is obtained after anode pole piece, diaphragm and cathode pole piece combining lamination again, battery core is placed in shell, electrolyte is injected, obtains lithium-ion capacitor after encapsulation；It is characterized by: active carbon and conducting polymer and Gao Fu lithium are mixed to form heterogeneous composite material when making anode sizing agent, make full use of active carbon to cooperate with energy storage mechanism with conducting polymer, promote the specific capacity of positive electrode.
Description
Technical field
The present invention relates to a kind of supercapacitor production methods, refer in particular to a kind of utilization other materials change lithium ion
Production method of the capacitor than the lithium-ion capacitor of energy；Belong to lithium-ion capacitor manufacture technology field.
Background technique:
Lithium-ion capacitor (Lithium ion capacitor, LIC), anode use active carbon, are electric double layer energy storage machine
Reason, cathode use the processed lithium ion battery negative pole carbon material of prelithiation, are lithium ion battery energy storage mechnism, by electric double layer electricity
The advantages of container and secondary cell, organically combines the novel mixed type energy storage device with one.At the embedding lithium of negative electrode material
Reason greatly reduces cathode potential, therefore the operating voltage of device can reach 4.0V, compared to electric double layer super capacitor
Device, lithium-ion capacitor energy density are increased dramatically.Currently, 15 Wh/kg of commercial li-ion capacitor energy density is left
The right side, but still have biggish gap compared with secondary cell, mainly the mode of positive and negative anodes electrode storage energy is different, and anode is living
Property Carbon Materials by absorption/desorption ion physical energy storage, Carbon anode is insertion/deintercalation chemical energy storage of lithium ion, negative electrode material
Gram volume be much higher than positive electrode, the quality of positive plate active material is much higher than negative electrode tab, shadow during electrode structural designs
The promotion for ringing lithium-ion capacitor energy density, the specific capacity for promoting positive electrode are to promote having for ionistor energy density
Effect approach, therefore it is necessary to improve this.
On the other hand, height can be stored by the conducting polymer of representative of polypyrrole, polyaniline, polythiophene and its derivative
Charge density, generates big quasi- faraday's capacitor, and the energy density of conducting polymer is double layer capacitor absorbent charcoal material
10 ~ 100 times.But such mechanical property of materials is bad, long-term cycle stability can be poor.If both wanting to utilize conducting polymer
Exclusive advantage, at the same overcome again its there are the shortcomings that, conducting polymer and other electrode materials can be carried out it is compound, will be double
Electric layer capacitor is in conjunction with faraday's capacitor, by organic material in conjunction with inorganic material, is mentioned using the synergistic effect between each component
High whole synthesis performance.
Secondly it is a ring the most key in lithium-ion capacitor manufacturing technology that cathode assigns lithium technology in advance, is generallyd use active
Lithium metal as lithium source, and the porous current collector of higher operating costs, with realize it is pre- assign lithium when, lithium ion is worn in pole piece group
Shuttle causes production process technology condition is harsh, manufacturing cost is high, is difficult to scale to manufacture.
By patent retrieval do not find have with the patent literature report of same technique of the present invention, have certain relationship with the present invention
Patent mainly have it is following:
1, number of patent application CN201810071152.9, a kind of entitled " hybrid super capacitor wet end furnish preparation side
Case ", applicant are as follows: the application for a patent for invention of Jiangsu Zun Dao Science and Technology Ltd., which disclose a kind of hybrid capacitors
Device wet end furnish preparation method, the preparation of the positive plate slurry including hybrid super capacitor and the cathode of hybrid super capacitor
The preparation of piece slurry；The raw material for preparing of the positive plate slurry of this kind of hybrid super capacitor includes active material spinel nickel mangaic acid
Lithium, adhesive PVDF and conductive agent SP；The raw material for preparing of the negative electrode tab slurry of this kind of hybrid super capacitor includes active material
AC, carboxyl methyl cellulose, adhesive LA132, adhesive PTFE (polytetrafluoroethylene (PTFE)) and conductive agent SP.
2, number of patent application CN201710770517.2, entitled " a kind of super capacitor combination electrode material and its system
Preparation Method ", applicant are as follows: the application for a patent for invention of University of Science & Technology, Beijing, which disclose a kind of supercapacitor compound electrics
Pole material and preparation method thereof, the method are former using the graphene of N doping as matrix in the preparation process of electrode material
Position polymerization Schiff base transition metal conducting polymer.N doping is carried out to graphene by addition urea, urea is in high temperature
Effect is lower to discharge ammonia, can nitrogenize to graphene, the high temperature heat radiation of microwave chemical reactor enhances the equal of reaction
One property has fake capacitance and excellent electrical conductance by the graphene of N doping, when the pure graphene of capacity ratio is as substrate
High 10%-20%, and nitrogen-doped graphene electrode material still keeps stablizing after multiple charge and discharge.But the patent is mixed with nitrogen
Miscellaneous graphene improves the circulation time of super capacitor as matrix in-situ polymerization Schiff base transition metal conducting polymer
Several and specific capacity, it is limited for the promotion of high energy ratio.
3, number of patent application CN201710729784.5, entitled " the fire-retardant organic electrolyte of supercapacitor,
Preparation method and supercapacitor ", applicant are as follows: the application for a patent for invention of good hundred million Electronic Science and Technology Co., Ltd. in Wujiang, this is specially
Benefit discloses the electrical property and the good organic electrolyte of anti-flammability, preparation method and super capacitor of a kind of supercapacitor
Device.The technical solution adopted by the present invention are as follows: a kind of fire-retardant organic electrolyte of supercapacitor, by electrolytic salt, non-aqueous
Organic solvent and function additive composition, above-mentioned electrolytic salt are tetraethylammonium tetrafluoroborate and double ethanedioic acid boric acid tetramethyls
Ammonium, the non-aqueous organic solvent are propene carbonate, dimethyl carbonate, methyl ethyl carbonate and gamma-butyrolacton, the function
Auxiliary agent is fluoro phosphonitrile compound.The patent proposes fire-retardant side primarily directed to organic electrolyte super capacitor fever problem on fire
Case, with increase high energy than unrelated.
By carefully analyzing to these above-mentioned patents, although these patents are directed to super capacitor and its production side
Method, it was also proposed that some improved technology schemes, but by carefully analyzing, these super capacitors proposed and preparation method thereof are all
Effectively solves the problems, such as lithium-ion capacitance high energy than manufacture in the presence of it is some, still need further to be studied.
Summary of the invention
Aiming at the problem that it is an object of the invention in the presence of existing lithium-ion capacitance high energy is than manufacture, one kind is proposed
The lithium can be substantially improved than manufacturing method than manufacturing method, this kind of lithium-ion capacitor high energy in new lithium-ion capacitor high energy
Ionistor high-energy density, and have the characteristics that preferable machinability and low cost.
In order to reach this purpose, lithium-ion capacitor specific capacity is promoted using conducting polymer the present invention provides a kind of
Method, first make anode sizing agent and negative electrode slurry respectively, then anode sizing agent is coated on the tow sides of positive pole aluminium foil piece,
Negative electrode slurry is coated on the tow sides of cathode aluminium foil, through drying, roll, be punched after obtain anode pole piece and cathode pole
Piece；Battery core is obtained after anode pole piece, diaphragm and cathode pole piece combining lamination again, battery core is placed in shell, injects electrolyte,
Lithium-ion capacitor is obtained after encapsulation；It is characterized in that when making anode sizing agent by active carbon and conducting polymer and Gao Fu
Lithium is mixed to form heterogeneous composite material, and active carbon is made full use of to cooperate with energy storage mechanism with conducting polymer, promotes positive electrode
Specific capacity.
Further, the anode sizing agent is that active carbon and conducting polymer and Gao Fu lithium material are mixed to form multiphase
Composite material is mixed together with conductive agent and binder, and is added mixture into N-Methyl pyrrolidone, through vacuum high-speed stirring
Anode sizing agent is formed after mixing.
Further, the active carbon specific surface area is greater than 1500 m2/ g, surface functional group content is in 0.5 meq/g
Hereinafter, tenor is less than 100 ppm, average pore size is in 1.7 nm or so, and partial size is at 8-10 μm.
Further, the conducting polymer is one of polypyrrole, polyaniline, polythiophene and its derivative or several
Kind, further preferred conducting polymer is polyaniline.
Further, the active carbon and conducting polymer and Gao Fu lithium material are mixed to form the system of heterogeneous composite material
Preparation Method is one of physical mixed method, solution blended process, situ aggregation method, interfacial polymerization, electrochemical polymerization method；It is described
Negative electrode slurry production when be by Carbon anode, conductive agent and binder be added deionized water in, formed after vacuum high-speed stirred
Negative electrode slurry.
Further, the active carbon and conducting polymer and Gao Fu lithium material are mixed to form the system of heterogeneous composite material
Preparation Method uses situ aggregation method, can prepare finely dispersed active carbon/conducting polymer composite material in this way, fill
The characteristic of the two is waved in distribution.
Further, the active carbon and conducting polymer and Gao Fu lithium material are mixed to form the system of heterogeneous composite material
Preparation Method is the active carbon suspension for preparing high dispersive first, and aniline monomer is then added, while certain catalyst is added,
Polymerization reaction occurs for the surface in situ of active carbon with high specific surface area, realizes highly disperse active charcoal/conducting polymer composite material
Preparation.
Further, the rich lithium material of the height is Li6CoO4、Li5FeO4、Li6MnO4One or more of, further
It is preferred that the high rich lithium material is Li6CoO4。
Further, the active carbon and conducting polymer and Gao Fu lithium material heterogeneous composite material use high-speed flow
Crushing technology preparation, realizes the uniform mixing of the composite material of different densities.
Further, the high specific energy lithium-ion capacitor making step is as follows.
(1) N- crassitude is added in the rich lithium composite material of active carbon/conducting polymer/height, conductive agent and binder
Anode sizing agent is formed after vacuum high-speed stirred in ketone, anode sizing agent is uniformly coated on the tow sides of positive pole aluminium foil piece,
Through drying, roll, be punched after obtain anode pole piece；
(2) Carbon anode, conductive agent and binder are added in deionized water, form negative electrode slurry after vacuum high-speed stirred, will bears
Pole slurry is uniformly coated on the tow sides of cathode aluminium foil, through drying, roll, be punched after obtain cathode pole piece；
(3) battery core is obtained after anode pole piece, diaphragm and cathode pole piece combination lamination, battery core is placed in shell, electrolyte is injected,
Lithium-ion capacitor is obtained after encapsulation.
The present invention has the advantages that
The present invention passes through the selection of conducting polymer in optimization anode composite material, to obtain the lithium-ion electric of high-energy density
Container, do so have the advantages that it is following some:
1, ion storage energy being adsorbed/is desorbed using high-specific surface area, conducting polymer and Li+ occur doping and generate fake capacitance,
High richness lithium material carries out pre- embedding lithium to cathode carbon as lithium source, using initial charge, makes lithium-ion electric using common collector
Container, the specific capacity of the positive electrode of Lai Tigao lithium-ion capacitor；
2, active carbon is adsorption/desorption ion physical energy storage by high-specific surface area, and specific surface area is low to be unfavorable for energy
The promotion of density；Secondly, the aperture of active carbon is too small, and ion is difficult into organic electrolyte, the surface of active carbon is caused
Utilization rate is low, causes capacity relatively low, and it is relatively low that aperture will cause greatly very much active carbon specific surface area；Again, the surface function of active carbon
Group and tenor influence leakage current, the cycle life etc. of lithium-ion capacitor.Comprehensively consider, the active carbon physical parameter control
System is in above range；
3, increase lithium-ion capacitor system lithium ion content using richness lithium material high in positive combination electrode, supplement Carbon anode is first
The irreversible embedding lithium of secondary charge and discharge electrical loss realizes the preparation of inexpensive lithium-ion capacitor.
Specific embodiment
It is next combined with specific embodiments below that the present invention is further explained.
Embodiment one
A method of lithium-ion capacitor specific capacity being promoted using conducting polymer, first makes anode sizing agent and cathode slurry respectively
Material, then anode sizing agent is coated on the tow sides of positive pole aluminium foil piece, negative electrode slurry is coated on the positive and negative of cathode aluminium foil
On two sides, through drying, roll, be punched after obtain anode pole piece and cathode pole piece；Again by anode pole piece, diaphragm and cathode pole piece group
Battery core is obtained after closing lamination, battery core is placed in shell, electrolyte is injected, obtains lithium-ion capacitor after encapsulation；Its feature exists
In active carbon and conducting polymer and Gao Fu lithium material being mixed to form heterogeneous composite material when making anode sizing agent, sufficiently
Energy storage mechanism is cooperateed with conducting polymer using active carbon, promotes the specific capacity of positive electrode.
Wherein, the specific surface area of active carbon is 1600-1800m2/ g, surface functional group content in 0.2-0.5 meq/g,
Tenor is less than 100 ppm, and average pore size is in 1.6-1.8 nm, and partial size is at 8-10 μm.Conducting polymer is polyaniline.It is high
Rich lithium material is Li6CoO4.
Preparation process of the invention is as follows:
(1) a certain proportion of active carbon, aniline, n,N dimethylformamide (DMF) are mixed, the ultrasonic disperse in ultrasonic machine
90min is poured into the reactor equipped with deionized water；There to be a certain proportion of ammonium persulfate APS to be dissolved in certain go with aniline
In ionized water, sufficiently dissolves, be subsequently poured into the above-mentioned reactor for being dispersed with active carbon；Keeping body ties up in the environment of 5 degree
Reaction 10 hours, filters, washs, being dried to obtain active carbon/polyaniline composite material, passing through regulation activity charcoal and aniline ratio
Example controls active carbon 70% in composite material, polyaniline 30%；Active carbon/polyaniline and Gao Fu lithium material Li6CoO4 are passed through
High-speed flow crushing technology prepares three-phase composite material, and the ratio of the rich lithium material three of control active carbon, polyaniline, height is
59.5%、25.5%、15%。
(2) weigh the rich lithium material Li6CoO4 of active carbon/polyaniline/height, conductive agent (Super P), binder (SBR) and
Dispersing agent (CMC), mass ratio 88:6:4:2.Using deionized water as solvent, successively by dispersing agent, conductive agent, active carbon and
Binder is added in the vacuum high speed grout mixer of 10L, and mixture is carried out vacuum high-speed stirred 4-6h with the speed of 3500rpm,
The viscosity of slurry is adjusted by addition deionized water during this period, and the solid content for controlling slurry obtains positive slurry between 20-40%
Material.Anode sizing agent is uniformly coated on by the way of continuous coating machine on the tow sides of positive pole aluminium foil piece (etched foil),
Coating process pole piece thickness control is 260 μm, and drying temperature is 110 DEG C, and application rate 5m/min adopts the electrode after drying
With continuous roller the pressure of 40t, 5m/min compaction speed under the conditions of rolled, roll the control of rear thickness of electrode and exist
240 μm, and above-mentioned electrode is punched into the anode pole piece of (50-60) mm* (70-80) mm.
(3) a certain amount of graphite/soft carbon/hard carbon composite material, conductive agent (Super P), binder (PVDF), quality are weighed
Ratio is 90:5:5.It is successively sequentially added into N-Methyl pyrrolidone solution, the additional amount by controlling solvent makes slurry
Viscosity and solid content are respectively maintained at 5000cps and 60%, are stirred under conditions of vacuum, 3500rpm by vacuum high-speed mixer
4-6h is mixed, negative electrode slurry is obtained.By negative electrode slurry using it is two-sided be continuously coated with by the way of be coated on cathode aluminium foil (etched foil)
On, coating thickness, application rate and drying temperature are respectively maintained at 90 μm, 5m/min and 130 DEG C.By above-mentioned electrode through grinding
Cathode pole piece can be obtained after pressure, punching, wherein rolling and punching condition prepares identical with positive, cathode pole piece thickness control exists
65 μm or so.
(4) by above-mentioned positive and negative electrode pole piece, PP/PE/PP type laminated diaphragm (production of Celgard company, the U.S.) using " bow
Type " lamination process builds up the battery core of 75*55*6.2mm, wherein the tab of 10 positive plates pools together aluminium pole in ultrasonic welding
Ear, the tab of 10 cathode pole pieces pool together aluminium pole ears in ultrasonic welding, and tab spacing is 15mm.
It is dried in vacuo by battery core at 65 DEG C, under conditions of -0.1MPa for 24 hours, puts it into aluminium after battery core is cooled to room temperature
In plastic film outer packaging bag, three sides including tab one side are subjected to hot-seal, are and then electrolysed on one side from remaining
The injection of liquid (LiPF6 solution, solvent are the mixture of EC, DEC and DMC that volume ratio is 1:1:1), the injection rate of electrolyte are
Inlet is finally carried out a heat-seal by 40g.
By capacitor, (Wuhan morning China produces, model BT2013C) carries out 2.7V/50mA on Land charge-discharge test instrument
(CC/CC) chemical conversion test, obtains entire super capacitor after the capacitor is then carried out secondary encapsulation, cutting edge Shape correction
Device.Subsequent high rate performance test current density is respectively 100,200,500,1000,2000,5000mA/g.The capacitor exists
With the energy density of 25.6Wh/kg under the conditions of 100mA/g.
Embodiment 2
Embodiment 2 and the production method of embodiment 1 are essentially identical, the difference is that:
The ratio of the rich lithium material Li6CoO4 three of active carbon, polyaniline, height is 68.0%, 17.0%, 10% in anode composite material.
The capacitor is detected under the conditions of 100mA/g with the energy density of 23.8Wh/kg by chemical property.
Embodiment 3
Embodiment 3 and the production method of embodiment 1 are essentially identical, the difference is that:
The ratio of the rich lithium material Li6CoO4 three of active carbon, polyaniline, height is 63.0%, 27.0%, 10% in anode composite material.
The capacitor is detected under the conditions of 100mA/g with the energy density of 21.7Wh/kg by chemical property.
Comparative example 1
This embodiment differs from embodiment 1 in that:
The ratio of both active carbon, high rich lithium material Li6CoO4 are 85%, 15% in anode composite material.By chemical property
The capacitor is detected under the conditions of 100mA/g with the energy density of 17.8Wh/kg.
Above-mentioned embodiment is only a preferred solution of the present invention, not the present invention is made in any form
Limitation, there are also other variations and modifications on the premise of not exceeding the technical scheme recorded in the claims.
It can be seen from above-described embodiment that the present invention is actually to be related to a kind of utilization conducting polymer promotion lithium ion
The method of capacitor specific capacity first makes anode sizing agent and negative electrode slurry respectively, then anode sizing agent is coated on positive pole aluminium foil piece
Tow sides on, negative electrode slurry is coated on the tow sides of cathode aluminium foil, through drying, roll, be punched after obtain just
Pole pole piece and cathode pole piece；Battery core is obtained after anode pole piece, diaphragm and cathode pole piece combining lamination again, battery core is placed in shell
In, electrolyte is injected, obtains lithium-ion capacitor after encapsulation；It is characterized in that when making anode sizing agent by active carbon with lead
Electric polymer and Gao Fu lithium are mixed to form heterogeneous composite material, and active carbon is made full use of to cooperate with energy storage mechanism with conducting polymer,
Promote the specific capacity of positive electrode.
Further, the anode sizing agent is that active carbon and conducting polymer and Gao Fu lithium material are mixed to form multiphase
Composite material is mixed together with conductive agent and binder, and is added mixture into N-Methyl pyrrolidone, through vacuum high-speed stirring
Anode sizing agent is formed after mixing.
Ion storage energy is adsorbed/is desorbed using high-specific surface area, conducting polymer and Li+ occur doping and generate counterfeit electricity
Hold, high richness lithium material carries out pre- embedding lithium to cathode carbon as lithium source, using initial charge, makes lithium ion using common collector
Capacitor, the specific capacity of the positive electrode of Lai Tigao lithium-ion capacitor.
Further, the negative electrode slurry is that deionized water is added in Carbon anode, conductive agent and binder in production
In, negative electrode slurry is formed after vacuum high-speed stirred.
Further, the active carbon specific surface area is greater than 1500 m2/ g(preferably, 1600-1800 m2/ g), surface
Functional group content at 0.5 meq/g or less (preferably, 0.2-0.5 meq/g), tenor preferably less than 100 ppm(,
60-80-0.5 ppm), average pore size is in 1.6-1.8 nm, and partial size is at 8-10 μm.
Active carbon is adsorption/desorption ion physical energy storage by high-specific surface area, and specific surface area is low to be unfavorable for energy
The promotion of metric density；Secondly, the aperture of active carbon is too small, and ion is difficult into organic electrolyte, the table of active carbon is caused
Face utilization rate is low, causes capacity relatively low, and it is relatively low that aperture will cause greatly very much active carbon specific surface area；Again, the surface official of active carbon
Leakage current, the cycle life etc. that lithium-ion capacitor is influenced with tenor can be rolled into a ball.Comprehensively consider, the active carbon physical parameter
Control is in above range.
Further, the conducting polymer is one of polypyrrole, polyaniline, polythiophene and its derivative or several
Kind, further preferred conducting polymer is polyaniline.
Further, the active carbon and conducting polymer and Gao Fu lithium material are mixed to form the system of heterogeneous composite material
Preparation Method is one of physical mixed method, solution blended process, situ aggregation method, interfacial polymerization, electrochemical polymerization method.
Further, the active carbon and conducting polymer and Gao Fu lithium material are mixed to form the system of heterogeneous composite material
Preparation Method uses situ aggregation method, can prepare finely dispersed active carbon/conducting polymer composite material in this way, fill
The characteristic of the two is waved in distribution.Briefly the preparation method is as follows: preparing the active carbon suspension of high dispersive first, aniline list is then added
Body, while certain catalyst is added, polymerization reaction occurs in the surface in situ of active carbon with high specific surface area, realizes that high dispersive is living
Property charcoal/conducting polymer composite material preparation.
Further, the rich lithium material of the height is Li6CoO4、Li5FeO4、Li6MnO4One or more of, further
It is preferred that the high rich lithium material is Li6CoO4。
Increase lithium-ion capacitor system lithium ion content using richness lithium material high in positive combination electrode, supplements Carbon anode
The irreversible embedding lithium of first charge-discharge loss realizes the preparation of inexpensive lithium-ion capacitor.
Further, the active carbon and conducting polymer and Gao Fu lithium material heterogeneous composite material use high-speed flow
Crushing technology preparation, realizes the uniform mixing of the composite material of different densities.
Further, the conductive agent is one in carbon black, graphite, carbon fiber, carbon nanotube, carbon fiber and graphene
Kind is a variety of.Preferably, the conductive agent is conductive carbon black, one-dimensional carbon nanotube, the two-dimensional graphene of zero dimension, structure
Build " point-line-face " three-phase composite conductive agent.
Further, the high specific energy lithium-ion capacitor making step is as follows.
(1) N- crassitude is added in the rich lithium composite material of active carbon/conducting polymer/height, conductive agent and binder
Anode sizing agent is formed after vacuum high-speed stirred in ketone, anode sizing agent is uniformly coated on the tow sides of positive pole aluminium foil piece,
Through drying, roll, be punched after obtain anode pole piece；
(2) Carbon anode, conductive agent and binder are added in deionized water, form negative electrode slurry after vacuum high-speed stirred, will bears
Pole slurry is uniformly coated on the tow sides of cathode aluminium foil, through drying, roll, be punched after obtain cathode pole piece；
(3) battery core is obtained after anode pole piece, diaphragm and cathode pole piece combination lamination, battery core is placed in shell, electrolyte is injected,
Lithium-ion capacitor is obtained after encapsulation.
The present invention has the advantages that
The present invention passes through the selection of conducting polymer in optimization anode composite material, to obtain the lithium-ion electric of high-energy density
Container, do so have the advantages that it is following some:
1, ion storage energy being adsorbed/is desorbed using high-specific surface area, conducting polymer and Li+ occur doping and generate fake capacitance,
High richness lithium material carries out pre- embedding lithium to cathode carbon as lithium source, using initial charge, makes lithium-ion electric using common collector
Container, the specific capacity of the positive electrode of Lai Tigao lithium-ion capacitor；
2, active carbon is adsorption/desorption ion physical energy storage by high-specific surface area, and specific surface area is low to be unfavorable for energy
The promotion of density；Secondly, the aperture of active carbon is too small, and ion is difficult into organic electrolyte, the surface of active carbon is caused
Utilization rate is low, causes capacity relatively low, and it is relatively low that aperture will cause greatly very much active carbon specific surface area；Again, the surface function of active carbon
Group and tenor influence leakage current, the cycle life etc. of lithium-ion capacitor.Comprehensively consider, the active carbon physical parameter control
System is in above range；
3, increase lithium-ion capacitor system lithium ion content using richness lithium material high in positive combination electrode, supplement Carbon anode is first
The irreversible embedding lithium of secondary charge and discharge electrical loss realizes the preparation of inexpensive lithium-ion capacitor.
Claims (10)
1. a kind of method for promoting lithium-ion capacitor specific capacity using conducting polymer, first makes anode sizing agent and cathode respectively
Slurry, then anode sizing agent is coated on the tow sides of positive pole aluminium foil piece, negative electrode slurry is being coated on cathode aluminium foil just
On anti-two sides, through drying, roll, be punched after obtain anode pole piece and cathode pole piece；Again by anode pole piece, diaphragm and cathode pole piece
Battery core is obtained after combination lamination, battery core is placed in shell, electrolyte is injected, obtains lithium-ion capacitor after encapsulation；Its feature
It is: active carbon and conducting polymer and Gao Fu lithium is mixed to form heterogeneous composite material when making anode sizing agent, sufficiently benefit
Energy storage mechanism is cooperateed with conducting polymer with active carbon, promotes the specific capacity of positive electrode.
2. the method for promoting lithium-ion capacitor specific capacity using conducting polymer as described in claim 1, it is characterised in that:
The anode sizing agent is that active carbon and conducting polymer and Gao Fu lithium material are mixed to form heterogeneous composite material, with conductive agent
It is mixed together, and is added mixture into N-Methyl pyrrolidone with binder, form anode sizing agent after vacuum high-speed stirred.
3. the method for promoting lithium-ion capacitor specific capacity using conducting polymer as claimed in claim 2, it is characterised in that:
The active carbon specific surface area is greater than 1500 m2/ g, surface functional group content is in 0.5 meq/g hereinafter, tenor is less than
100 ppm, average pore size is in 1.7 nm or so, and partial size is at 8-10 μm.
4. the method for promoting lithium-ion capacitor specific capacity using conducting polymer as claimed in claim 2, it is characterised in that:
The conducting polymer is one or more of polypyrrole, polyaniline, polythiophene and its derivative, further preferably conduction
Polymer is polyaniline.
5. the method for promoting lithium-ion capacitor specific capacity using conducting polymer as claimed in claim 2, it is characterised in that:
The preparation method that the active carbon and conducting polymer and Gao Fu lithium material are mixed to form heterogeneous composite material is physical mixed
One of method, solution blended process, situ aggregation method, interfacial polymerization, electrochemical polymerization method.
6. the method for promoting lithium-ion capacitor specific capacity using conducting polymer as described in claim 1, it is characterised in that:
The negative electrode slurry is that Carbon anode, conductive agent and binder are added in deionized water in production, after vacuum high-speed stirred
Form negative electrode slurry.
7. the method for promoting lithium-ion capacitor specific capacity using conducting polymer as described in claim 1, it is characterised in that:
The active carbon and conducting polymer and Gao Fu lithium material are mixed to form the preparation method of heterogeneous composite material using in situ poly-
It is legal, finely dispersed active carbon and conducting polymer composite material can be prepared in this way, give full play to the spy of the two
Property.
8. the method for promoting lithium-ion capacitor specific capacity using conducting polymer as described in claim 1, it is characterised in that:
The rich lithium material of the height is Li6CoO4、Li5FeO4、Li6MnO4One or more of；The further preferably described high rich lithium material
Material is Li6CoO4。
9. the method for promoting lithium-ion capacitor specific capacity using conducting polymer as described in claim 1, it is characterised in that:
The active carbon and conducting polymer and Gao Fu lithium material heterogeneous composite material is prepared using high-speed flow crushing technology, is realized
The uniform mixing of the composite material of different densities.
10. the method for promoting lithium-ion capacitor specific capacity using conducting polymer as described in claim 1, feature exist
In: the high specific energy lithium-ion capacitor making step is as follows.
(1) the rich lithium composite material of active carbon/conducting polymer/height, conductive agent and binder are added in N-Methyl pyrrolidone
Anode sizing agent is formed after vacuum high-speed stirred, anode sizing agent is uniformly coated on the tow sides of positive pole aluminium foil piece, through dry
It is dry, roll, be punched after obtain anode pole piece；
(2) Carbon anode, conductive agent and binder are added in deionized water, form negative electrode slurry after vacuum high-speed stirred, will bears
Pole slurry is uniformly coated on the tow sides of cathode aluminium foil, through drying, roll, be punched after obtain cathode pole piece；
(3) battery core is obtained after anode pole piece, diaphragm and cathode pole piece combination lamination, battery core is placed in shell, electrolyte is injected,
Lithium-ion capacitor is obtained after encapsulation.
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