CN106340622A - High-power high-energy chemical power supply and preparation method thereof - Google Patents

High-power high-energy chemical power supply and preparation method thereof Download PDF

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Publication number
CN106340622A
CN106340622A CN201610856628.0A CN201610856628A CN106340622A CN 106340622 A CN106340622 A CN 106340622A CN 201610856628 A CN201610856628 A CN 201610856628A CN 106340622 A CN106340622 A CN 106340622A
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carbon
energy
lithium ion
power source
electrolyte
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杨恩东
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NANTONG JIANGHAI CAPACITOR CO Ltd
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NANTONG JIANGHAI CAPACITOR CO Ltd
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Priority to CN201610856628.0A priority Critical patent/CN106340622A/en
Publication of CN106340622A publication Critical patent/CN106340622A/en
Priority to PCT/CN2017/099766 priority patent/WO2018059180A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
    • H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • Y02E60/10—Energy storage using batteries
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention relates to a high-power high-energy chemical power supply and a preparation method thereof. The high-power high-energy chemical power supply comprises a positive electrode, a negative electrode, a diaphragm and electrolyte, wherein the positive electrode is a mixture of lithium ion metal oxide and high-surface-area charcoal; the negative carbon is a mixture of hard carbon and lithium ion metal nitride; the electrolyte is a non-aqueous organic solvent containing lithium ions. The preparation method comprises the following steps: mixing the raw materials, stirring the materials to be pasty, coating the paste on a current collector, and performing drying, rolling, cutting and vacuum-drying to prepare a positive electrode plate/a negative electrode plate; preparing an electric core by utilizing the positive electrode plate, the negative electrode plate and the diaphragm, welding a positive/negative electrode cluster on an electrode lug separately, putting in a shell, adding the electrolyte and sealing to obtain the high-power high-energy chemical power supply. The energy density of the chemical power supply provided by the invention reaches 100 to 150 Wh/Kg and the power density of the chemical power supply is more than 5000 W/Kg; the chemical power supply can be widely applied in the fields of pure electric vehicles, hybrid power vehicles, electric tools, backup power supplies, photovoltaic power generation and energy storage, wind electricity peak load regulation and energy storage and the like.

Description

A kind of high power high-energy electrochmical power source and preparation method thereof
Technical field
The invention belongs to technical field of chemical power, particularly to a kind of high power high-energy electrochmical power source and its preparation side Method.
Background technology
Electrochmical power source is a kind of device carrying out energy storage using electrochemical redox reaction, mainly includes lithium-ion electric Pond, Ni-MH battery, nickel-cadmium cell, lead-acid battery etc..At present, energy density highest electrochmical power source is lithium ion battery, its storage Density can reach 150～220wh/kg, become some main power sources to volume, the higher application scenario of weight demands, such as mobile phone, number Code-phase machine, notebook computer etc..Continuing to increase with environmental protection pressure, countries in the world all put into huge human and material resources And financial resources development new-energy automobile, and obtaining significant progress, new-energy automobile promotion efficiency continues to increase, commercialization market Application scale constantly expands.And the electrochmical power source that new-energy automobile mainly uses is lithium ion battery.
Although the scale of new-energy automobile lithium ion battery achieves rapid development in recent years, market capacity is suitable Huge, but, lithium ion battery charging rate is slow, cycle charge-discharge short life, power characteristic are undesirable, cryogenic property is not good etc. Shortcoming still limits the development of new-energy automobile to a certain extent.In order that new-energy automobile really meets wanting of actual user Ask it is necessary to improve to lithium ion battery, overcome some of shortcoming, lifting charging rate and cycle life, strengthen high-power Characteristic is so as to become the electrochmical power source of a kind of high power, long-life, high-energy.
Content of the invention
The technical problem to be solved is to provide a kind of high power high-energy electrochmical power source and preparation method thereof, should Electrochmical power source is made up of positive pole, negative pole and marginal barrier film, electrolyte, and positive active material adopts lithium ion metal Oxide and the mixture of high surface area carbon, negative electrode active material adopts the mixture of hard carbon and lithium ion metal nitride, Electrolyte adopts the non-aqueous organic solvent containing lithium ion, can be widely applied to pure electric automobile, hybrid vehicle, electronic work The fields such as tool, back-up source, photovoltaic generation energy storage, wind-powered peak regulation energy storage.
A kind of high power high-energy electrochmical power source of the present invention, including positive pole, negative pole, barrier film and electrolyte, described positive pole For the mixture of lithium ion metal-oxide and high surface area carbon, negative pole is the mixing of hard carbon and lithium ion metal nitride Thing, electrolyte is the non-aqueous organic solvent containing lithium ion.
The binding agent that mass content is 1%～15% and mass content is added to be 1%～10% in described positive pole and negative pole Conductive agent at least one；The radix of above-mentioned mass content (does not include for positive pole raw material gross mass/negative pole raw material gross mass Solvent).
Described binding agent include politef, Kynoar, hydroxypropyl methyl cellulose, Sodium Tvlose and At least one in butadiene-styrene rubber；Conductive agent is conductive black, acetylene black, at least one in graphite powder.
Described lithium ion metal-oxide is 5:5～10:1 with the mass ratio of high surface area carbon；Hard carbon and lithium ion gold The mass ratio belonging to nitride is 6:4～15:1.
Described lithium ion metal-oxide is licoo2、limn2o4、lini0.5mn1.5o4、linio2、lifepo4、 lini0.8co0.2o2、lini0.8co0.15a10.05o2、lini1/3co1/3mn1/3o2、lini0.6co0.2mn0.2o2、 lini0.8co0.1mn0.1o2In at least one；Charcoal is activated carbon, NACF, white carbon black, mesoporous carbon, charcoal-aero gel, charcoal are received At least one in mitron and Graphene.
Described lithium ion metal-oxide be a class can carry out lithium ion reversible embedded and embedding go out, repeated charge characteristic good Material；Specific surface area >=the 1000m of described high surface area carbon2/ g, is that a class has flourishing internal pore structure, using double Electric layer electric capacity and the material of fake capacitance energy storage.
Described lithium ion metal oxynitride is li2.6co0.4n、li2.5ni0.5n、li2.6cu0.4n、li7mnn4、li3fen2 In at least one；Hard carbon is phenolic resin carbon, epoxy resin carbon, poly furfuryl alcohol resin carbon, furfural resin carbon, benzene carbon, poly furfuryl alcohol At least one in pyrolytic carbon, polrvinyl chloride pyrolytic carbon and phenolic aldehyde pyrolytic carbon.
Described lithium ion metal nitride has outstanding ionic conductivity, and its working electrode potential is in 0～1.4v (relatively Lithium metal), specific capacity is in 200～900mah/g；Hard carbon is that high temperature more than 2500 DEG C for the class is difficult to graphited material with carbon element, It is belonging to macromolecule thermally decomposed carbon, specific capacity reaches 300～800mah/g.
Described barrier film is polyethene microporous membrane, microporous polypropylene membrane, composite membrane, inorganic ceramic film, paper barrier film, polyvinylidene fluoride Alkene film or polyimide film.
Described barrier film is microporous membrane, and its thickness, at 10～50 μm, has good absorption and the ability of holding electrolyte, Keep reliable and stable in wide temperature range simultaneously.
In described electrolyte, the concentration of lithium ion is 0.5～2.0mol/l..
In described electrolyte, lithium ion derives from lithium salts；Wherein, lithium salts is liclo4、libf4、lipf6、licf3so3、lin (cf3so2)、libob、liasf6、lib(ch3)4、lib(cf3)4、lipo2(c2f5)2In at least one；Non-aqueous organic solvent is Ethylene carbonate, perfluorocarbon acid vinyl acetate, Allyl carbonate, perfluorocarbon acid propylene, gamma-butyrolacton, dimethyl carbonate, carbonic acid Diethylester, butylene, Ethyl methyl carbonate, methyl propyl carbonate, ethylene sulfite, propylene sulfite, ethyl acetate, second At least one in propyl propionate, acetonitrile.
A kind of preparation method of the high power high-energy electrochmical power source of the present invention, comprising:
(1) each raw material is mixed, stir to paste, then apply on a current collector, drying, roll, cut, being vacuum dried It is prepared into positive plate/negative plate；
(2) utilize positive plate, negative plate and barrier film preparation battery core, the positive/negative cluster in battery core is welded to pole On ear, it is placed in shell, adds electrolyte, sealing obtains final product.
In the present invention, the collector of positive plate adopts aluminium foil, aluminium net, porous aluminium foil, foamed aluminium, and the collector of negative plate is adopted With Copper Foil, copper mesh, porous copper foil, foam copper, nickel foil, nickel screen, nickel foam, stainless steel foil, stainless (steel) wire.
In the present invention, the making step of positive plate is: weighs lithium ion metal-oxide, high ratio according to certain mass ratio Surface carbon deposit, conductive agent, after binding agent mixing, stir to paste, then apply on a current collector, drying, roll, cut, very Empty drying is prepared into positive plate.The making step of negative plate is: according to certain mass ratio weigh hard carbon, metal lithium nitride, After conductive agent, binding agent mixing, stir to paste, then apply on a current collector, drying, roll, cut, being vacuum dried preparation Become negative plate.
According to the difference to power and energy emphasis for the whole electrochmical power source, can optimize and revise in both positive and negative polarity active substance The ratio of each component.
The present invention, on the basis of lithium ion battery, has carried out brand-new electrochemistry design, positive pole aspect, by ultracapacitor Introduced wherein with high-specific surface area Carbon Materials, form anode composite with lithium ion metal-oxide, produce the collaborative of capacitor batteries Effect, significantly improves its cycle life and fast charging and discharging responding ability；Negative pole aspect, using large interlamellar spacing, possesses and quickly fills Electric discharge and the hard carbon material of long circulation life, but, hard carbon material generally existing first charge-discharge efficiency low (typically 75～ Between 80%), the high shortcoming of irreversible capacity, if using it as single negative pole, the energy density of whole electrochmical power source is low, It is unfavorable for the popularization of its market application, in order to overcome it not enough, the present invention creatively will carry the metal lithium nitride of lithium source Introduce negative pole, form charcoal lithium composite negative pole, make up the loss of Carbon Materials irreversible capacity first, the overall energy of lifting electrochmical power source Metric density.
Beneficial effect
The present invention passes through to carry out brand-new electrochemistry design on both positive and negative polarity so that energy storage device has high-energy-density (100-160wh/kg can be reached), high power density (> 5000w/kg) characteristic (energy density and power density are all according to reality The weight of border device is calculated), can be widely applied to pure electric automobile, hybrid vehicle, electric tool, standby electricity The fields such as source, photovoltaic generation energy storage, wind-powered peak regulation energy storage.
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention Rather than restriction the scope of the present invention.In addition, it is to be understood that after having read the content of present invention instruction, people in the art Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited Scope.
Embodiment 1
The making of positive plate: by licoo2, specific surface area >=1000m2The activated carbon of/g, conductive black, pvdf are in mass ratio For 80:10:5:5 mixing, be tuned into slurry with nmp, be then coated on 16 μm aluminium foil (coating weightening be: 42mg/cm2) on, warp Dry (120 DEG C), roll, cut-parts (active substance a size of: 40*60mm2), 24h vacuum drying (120 DEG C) be fabricated to positive pole Piece.
The making of negative plate: by phenolic resin carbon, li2.6co0.4N, conductive black, pvdf are 80:10:5:5 in mass ratio Mixing, be tuned into slurry with nmp, be then coated on the Copper Foil of 10 μ (coating weightening be: 21mg/cm2), drying (120 DEG C), Roll, cut-parts (active substance a size of: 41*61mm2), 24h vacuum drying (120 DEG C) be fabricated to negative plate.
It is barrier film from polyethene microporous membrane, positive plate (15), barrier film, negative plate (16) are laminated into battery core, so Afterwards the positive pole pole group of the battery core folded is welded on aluminum lug, negative pole pole group is welded on copper nickel plating lug, by the electricity after welding Core is put in the aluminum plastic film of forming, and injects 1mol/l lipf6Ec (ethylene carbonate)/dmc (dimethyl carbonate) (matter Amount than be 1:1) electrolyte 10g, be assembled into square energy storage device.After chemical conversion, (0.1c charges to 4.2v to device, and 0.1c discharges To 2.5), first charge-discharge efficiency is 98.5%, carries out performance test, and work system charges to 4.2v for 2a, stands 5min, 2a It is discharged to 2.5v, the specific energy of device is 140wh/kg, and specific power is 6000w/kg, after 5a charge and discharge circulates 20000 times, holds Amount conservation rate is 80%.
Embodiment 2
The making of positive plate: by limn2o4, specific surface area >=1000m2The activated carbon of/g, conductive black, pvdf press quality Mix than for 80:10:5:5, be tuned into slurry with nmp, be then coated on 16 μm aluminium foil (coating weightening be: 42mg/cm2) on, Drying (120 DEG C), roll, cut-parts (active substance a size of: 40*60mm2), 24h vacuum drying (120 DEG C) be fabricated to positive pole Piece.
The making of negative plate: by phenolic resin carbon, li2.6co0.4N, conductive black, pvdf are 80:10:5:5 in mass ratio Mixing, be tuned into slurry with nmp, be then coated on the Copper Foil of 10 μ (coating weightening be: 21mg/cm2), drying (120 DEG C), Roll, cut-parts (active substance a size of: 41*61mm2), 24h vacuum drying (120 DEG C) be fabricated to negative plate.
It is barrier film from polyethene microporous membrane, positive plate (15), barrier film, negative plate (16) are laminated into battery core, so Afterwards the positive pole pole group of the battery core folded is welded on aluminum lug, negative pole pole group is welded on copper nickel plating lug, by the electricity after welding Core is put in the aluminum plastic film of forming, and injects 1mol/l lipf6Ec (ethylene carbonate)/dmc (dimethyl carbonate) (matter Amount than be 1:1) electrolyte 10g, be assembled into square energy storage device.After chemical conversion, (0.1c charges to 4.2v to device, and 0.1c discharges To 2.5), first charge-discharge efficiency is 98.0%, carries out performance test, and work system charges to 4.2v for 2a, stands 5min, 2a It is discharged to 2.5v, the specific energy of device is 100wh/kg, and specific power is 6500w/kg, after 5a charge and discharge circulates 20000 times, holds Amount conservation rate is 82%.
Embodiment 3
The making of positive plate: by linio2, specific surface area >=1000m2The activated carbon of/g, conductive black, pvdf are in mass ratio For 80:10:5:5 mixing, be tuned into slurry with nmp, be then coated on 16 μm aluminium foil (coating weightening be: 42mg/cm2) on, warp Dry (120 DEG C), roll, cut-parts (active substance a size of: 40*60mm2), 24h vacuum drying (120 DEG C) be fabricated to positive pole Piece.
The making of negative plate: by phenolic resin carbon, li2.6co0.4N, conductive black, pvdf are 80:10:5:5 in mass ratio Mixing, be tuned into slurry with nmp, be then coated on the Copper Foil of 10 μ (coating weightening be: 21mg/cm2), drying (120 DEG C), Roll, cut-parts (active substance a size of: 41*61mm2), 24h vacuum drying (120 DEG C) be fabricated to negative plate.
It is barrier film from polyethene microporous membrane, positive plate (15), barrier film, negative plate (16) are laminated into battery core, so Afterwards the positive pole pole group of the battery core folded is welded on aluminum lug, negative pole pole group is welded on copper nickel plating lug, by the electricity after welding Core is put in the aluminum plastic film of forming, and injects 1mol/l lipf6Ec (ethylene carbonate)/dmc (dimethyl carbonate) (matter Amount than be 1:1) electrolyte 10g, be assembled into square energy storage device.After chemical conversion, (0.1c charges to 4.2v to device, and 0.1c discharges To 2.5), first charge-discharge efficiency is 97.5%, carries out performance test, and work system charges to 4.2v for 2a, stands 5min, 2a It is discharged to 2.5v, the specific energy of device is 160wh/kg, and specific power is 5500w/kg, after 5a charge and discharge circulates 20000 times, holds Amount conservation rate is 75%.
Embodiment 4
The making of positive plate: by lini1/3co1/3mn1/3o2, specific surface area >=1000m2The activated carbon of/g, conductive black, Pvdf in mass ratio for 80:10:5:5 mix, be tuned into slurry with nmp, be then coated on 16 μm aluminium foil (coating weightening be: 42mg/cm2) on, drying (120 DEG C), roll, cut-parts (active substance a size of: 40*60mm2), 24h vacuum drying (120 DEG C) it is fabricated to positive plate.
The making of negative plate: by phenolic resin carbon, li2.6co0.4N, conductive black, pvdf are 80:10:5:5 in mass ratio Mixing, be tuned into slurry with nmp, be then coated on the Copper Foil of 10 μ (coating weightening be: 21mg/cm2), drying (120 DEG C), Roll, cut-parts (active substance a size of: 41*61mm2), 24h vacuum drying (120 DEG C) be fabricated to negative plate.
It is barrier film from polyethene microporous membrane, positive plate (15), barrier film, negative plate (16) are laminated into battery core, so Afterwards the positive pole pole group of the battery core folded is welded on aluminum lug, negative pole pole group is welded on copper nickel plating lug, by the electricity after welding Core is put in the aluminum plastic film of forming, and injects 1mol/l lipf6Ec (ethylene carbonate)/dmc (dimethyl carbonate) (matter Amount than be 1:1) electrolyte 10g, be assembled into square energy storage device.After chemical conversion, (0.1c charges to 4.2v to device, and 0.1c discharges To 2.5), first charge-discharge efficiency is 98.2%, carries out performance test, and work system charges to 4.2v for 2a, stands 5min, 2a It is discharged to 2.5v, the specific energy of device is 145wh/kg, and specific power is 6200w/kg, after 5a charge and discharge circulates 20000 times, holds Amount conservation rate is 90%.
Embodiment 5
The making of positive plate: by lini0.8co0.15a10.05o2, specific surface area >=1000m2The activated carbon of/g, conductive black, Pvdf in mass ratio for 80:10:5:5 mix, be tuned into slurry with nmp, be then coated on 16 μm aluminium foil (coating weightening be: 42mg/cm2) on, drying (120 DEG C), roll, cut-parts (active substance a size of: 40*60mm2), 24h vacuum drying (120 DEG C) it is fabricated to positive plate.
The making of negative plate: by phenolic resin carbon, li2.6co0.4N, conductive black, pvdf are 80:10:5:5 in mass ratio Mixing, be tuned into slurry with nmp, be then coated on the Copper Foil of 10 μ (coating weightening be: 21mg/cm2), drying (120 DEG C), Roll, cut-parts (active substance a size of: 41*61mm2), 24h vacuum drying (120 DEG C) be fabricated to negative plate.
It is barrier film from polyethene microporous membrane, positive plate (15), barrier film, negative plate (16) are laminated into battery core, so Afterwards the positive pole pole group of the battery core folded is welded on aluminum lug, negative pole pole group is welded on copper nickel plating lug, by the electricity after welding Core is put in the aluminum plastic film of forming, and injects 1mol/l lipf6Ec (ethylene carbonate)/dmc (dimethyl carbonate) (matter Amount than be 1:1) electrolyte 10g, be assembled into square energy storage device.After chemical conversion, (0.1c charges to 4.2v to device, and 0.1c discharges To 2.5), first charge-discharge efficiency is 98.1%, carries out performance test, and work system charges to 4.2v for 2a, stands 5min, 2a It is discharged to 2.5v, the specific energy of device is 155wh/kg, and specific power is 6100w/kg, after 5a charge and discharge circulates 20000 times, holds Amount conservation rate is 85%.
Embodiment 6
The making of positive plate: by lini0.8co0.15a10.05o2, specific surface area >=1000m2The activated carbon of/g, conductive black, Pvdf in mass ratio for 80:10:5:5 mix, be tuned into slurry with nmp, be then coated on 16 μm aluminium foil (coating weightening be: 42mg/cm2) on, drying (120 DEG C), roll, cut-parts (active substance a size of: 40*60mm2), 24h vacuum drying (120 DEG C) it is fabricated to positive plate.
The making of negative plate: by phenolic resin carbon, li2.5ni0.5N, conductive black, pvdf are 80:10:5:5 in mass ratio Mixing, be tuned into slurry with nmp, be then coated on the Copper Foil of 10 μ (coating weightening be: 21mg/cm2), drying (120 DEG C), Roll, cut-parts (active substance a size of: 41*61mm2), 24h vacuum drying (120 DEG C) be fabricated to negative plate.
It is barrier film from polyethene microporous membrane, positive plate (15), barrier film, negative plate (16) are laminated into battery core, so Afterwards the positive pole pole group of the battery core folded is welded on aluminum lug, negative pole pole group is welded on copper nickel plating lug, by the electricity after welding Core is put in the aluminum plastic film of forming, and injects 1mol/l lipf6Ec (ethylene carbonate)/dmc (dimethyl carbonate) (matter Amount than be 1:1) electrolyte 10g, be assembled into square energy storage device.After chemical conversion, (0.1c charges to 4.2v to device, and 0.1c discharges To 2.5), first charge-discharge efficiency is 97.9%, carries out performance test, and work system charges to 4.2v for 2a, stands 5min, 2a It is discharged to 2.5v, the specific energy of device is 152wh/kg, and specific power is 6050w/kg, after 5a charge and discharge circulates 20000 times, holds Amount conservation rate is 83%.
Embodiment 7
The making of positive plate: by lini0.8co0.15a10.05o2, specific surface area >=1000m2The activated carbon of/g, conductive black, Pvdf in mass ratio for 80:10:5:5 mix, be tuned into slurry with nmp, be then coated on 16 μm aluminium foil (coating weightening be: 42mg/cm2) on, drying (120 DEG C), roll, cut-parts (active substance a size of: 40*60mm2), 24h vacuum drying (120 DEG C) it is fabricated to positive plate.
The making of negative plate: by phenolic resin carbon, li2.6cu0.4N, conductive black, pvdf are 80:10:5:5 in mass ratio Mixing, be tuned into slurry with nmp, be then coated on the Copper Foil of 10 μ (coating weightening be: 21mg/cm2), drying (120 DEG C), Roll, cut-parts (active substance a size of: 41*61mm2), 24h vacuum drying (120 DEG C) be fabricated to negative plate.
It is barrier film from polyethene microporous membrane, positive plate (15), barrier film, negative plate (16) are laminated into battery core, so Afterwards the positive pole pole group of the battery core folded is welded on aluminum lug, negative pole pole group is welded on copper nickel plating lug, by the electricity after welding Core is put in the aluminum plastic film of forming, and injects 1mol/l lipf6Ec (ethylene carbonate)/dmc (dimethyl carbonate) (matter Amount than be 1:1) electrolyte 10g, be assembled into square energy storage device.After chemical conversion, (0.1c charges to 4.2v to device, and 0.1c discharges To 2.5), first charge-discharge efficiency is 97.8%, carries out performance test, and work system charges to 4.2v for 2a, stands 5min, 2a It is discharged to 2.5v, the specific energy of device is 151wh/kg, and specific power is 6150w/kg, after 5a charge and discharge circulates 20000 times, holds Amount conservation rate is 86%.
Embodiment 8
The making of positive plate: by lini0.8co0.15a10.05o2, specific surface area >=1000m2The activated carbon of/g, conductive black, Pvdf in mass ratio for 80:10:5:5 mix, be tuned into slurry with nmp, be then coated on 16 μm aluminium foil (coating weightening be: 42mg/cm2) on, drying (120 DEG C), roll, cut-parts (active substance a size of: 40*60mm2), 24h vacuum drying (120 DEG C) it is fabricated to positive plate.
The making of negative plate: by phenolic resin carbon, li7mnn4, conductive black, pvdf in mass ratio for 80:10:5:5 mix Close, be tuned into slurry with nmp, be then coated on the Copper Foil of 10 μ (coating weightening be: 21mg/cm2), drying (120 DEG C), stone roller Pressure, cut-parts are (active substance a size of: 41*61mm2), 24h vacuum drying (120 DEG C) be fabricated to negative plate.
It is barrier film from polyethene microporous membrane, positive plate (15), barrier film, negative plate (16) are laminated into battery core, so Afterwards the positive pole pole group of the battery core folded is welded on aluminum lug, negative pole pole group is welded on copper nickel plating lug, by the electricity after welding Core is put in the aluminum plastic film of forming, and injects 1mol/l lipf6Ec (ethylene carbonate)/dmc (dimethyl carbonate) (matter Amount than be 1:1) electrolyte 10g, be assembled into square energy storage device.After chemical conversion, (0.1c charges to 4.2v to device, and 0.1c discharges To 2.5), first charge-discharge efficiency is 97.0%, carries out performance test, and work system charges to 4.2v for 2a, stands 5min, 2a It is discharged to 2.5v, the specific energy of device is 146wh/kg, and specific power is 5950w/kg, after 5a charge and discharge circulates 20000 times, holds Amount conservation rate is 84%.
Embodiment 9
The making of positive plate: by lini0.8co0.15a10.05o2, specific surface area >=1000m2The activated carbon of/g, conductive black, Pvdf in mass ratio for 80:10:5:5 mix, be tuned into slurry with nmp, be then coated on 16 μm aluminium foil (coating weightening be: 42mg/cm2) on, drying (120 DEG C), roll, cut-parts (active substance a size of: 40*60mm2), 24h vacuum drying (120 DEG C) it is fabricated to positive plate.
The making of negative plate: by phenolic resin carbon, li3Fen, conductive black, pvdf mix for 80:10:5:5 in mass ratio Close, be tuned into slurry with nmp, be then coated on the Copper Foil of 10 μ (coating weightening be: 21mg/cm2), drying (120 DEG C), stone roller Pressure, cut-parts are (active substance a size of: 41*61mm2), 24h vacuum drying (120 DEG C) be fabricated to negative plate.
It is barrier film from polyethene microporous membrane, positive plate (15), barrier film, negative plate (16) are laminated into battery core, so Afterwards the positive pole pole group of the battery core folded is welded on aluminum lug, negative pole pole group is welded on copper nickel plating lug, by the electricity after welding Core is put in the aluminum plastic film of forming, and injects 1mol/l lipf6Ec (ethylene carbonate)/dmc (dimethyl carbonate) (matter Amount than be 1:1) electrolyte 10g, be assembled into square energy storage device.After chemical conversion, (0.1c charges to 4.2v to device, and 0.1c discharges To 2.5), first charge-discharge efficiency is 96.5%, carries out performance test, and work system charges to 4.2v for 2a, stands 5min, 2a It is discharged to 2.5v, the specific energy of device is 143wh/kg, and specific power is 5850w/kg, after 5a charge and discharge circulates 20000 times, holds Amount conservation rate is 78%.
As can be seen from the above embodiments, by adjusting the species of the various active material of both positive and negative polarity, the storage of present invention preparation Can device first charge-discharge efficiency be 96.5～98.5%, energy density be 100～160wh/kg, specific power be 5500～ 6500w/kg, after 20,000 charge and discharge cycles, capability retention, between 75～90%, shows good energy, power and length Life characteristic, can meet the requirement of various application scenarios, more especially require high power, high-energy and long-life use Field.

Claims (10)

1. a kind of high power high-energy electrochmical power source, including positive pole, negative pole, barrier film and electrolyte it is characterised in that described positive pole For the mixture of lithium ion metal-oxide and high surface area carbon, negative pole is the mixing of hard carbon and lithium ion metal nitride Thing, electrolyte is the non-aqueous organic solvent containing lithium ion.
2. a kind of high power high-energy electrochmical power source according to claim 1 is it is characterised in that in described positive pole and negative pole Add at least one in the binding agent and conductive agent that mass content is 1%～10% that mass content is 1%～15%.
3. a kind of high power high-energy electrochmical power source according to claim 2 is it is characterised in that described binding agent includes gathering At least one in tetrafluoroethene, Kynoar, hydroxypropyl methyl cellulose, Sodium Tvlose and butadiene-styrene rubber；Lead Electric agent is conductive black, acetylene black, at least one in graphite powder.
4. a kind of high power high-energy electrochmical power source according to claim 1 is it is characterised in that described lithium ion metal oxygen Compound is 5:5～10:1 with the mass ratio of high surface area carbon；The mass ratio of hard carbon and lithium ion metal nitride be 6:4～ 15:1.
5. a kind of high power high-energy electrochmical power source according to claim 1 or 4 is it is characterised in that described lithium ion is golden Genus oxide is licoo2、limn2o4、lini0.5mn1.5o4、linio2、lifepo4、lini0.8co0.2o2、 lini0.8co0.15a10.05o2、lini1/3co1/3mn1/3o2、lini0.6co0.2mn0.2o2、lini0.8co0.1mn0.1o2In at least one Kind；High surface area carbon is in activated carbon, NACF, white carbon black, mesoporous carbon, charcoal-aero gel, carbon nanotube and Graphene At least one；Described lithium ion metal oxynitride is li2.6co0.4n、li2.5ni0.5n、li2.6cu0.4n、li7mnn4、li3fen2 In at least one；Hard carbon is phenolic resin carbon, epoxy resin carbon, poly furfuryl alcohol resin carbon, furfural resin carbon, benzene carbon, poly furfuryl alcohol At least one in pyrolytic carbon, polrvinyl chloride pyrolytic carbon and phenolic aldehyde pyrolytic carbon；Wherein, the specific surface area of high surface area carbon >= 1000m2/g.
6. a kind of high power high-energy electrochmical power source according to claim 1 is it is characterised in that described barrier film is polyethylene Microporous membrane, microporous polypropylene membrane, composite membrane, inorganic ceramic film, paper barrier film, polyvinylidene fluoride film or polyimide film.
7. a kind of high power high-energy electrochmical power source according to claim 1 it is characterised in that in described electrolyte lithium from The concentration of son is 0.5～2.0mol/l.
8. a kind of high power high-energy electrochmical power source according to claim 1 it is characterised in that in described electrolyte lithium from Son derives from lithium salts；Wherein, lithium salts is liclo4、libf4、lipf6、licf3so3、lin(cf3so2)、libob、liasf6、lib (ch3)4、lib(cf3)4、lipo2(c2f5)2In at least one；Non-aqueous organic solvent is ethylene carbonate, perfluorocarbon acid ethylene Ester, Allyl carbonate, perfluorocarbon acid propylene, gamma-butyrolacton, dimethyl carbonate, diethyl carbonate, butylene, carbonic acid In methyl ethyl ester, methyl propyl carbonate, ethylene sulfite, propylene sulfite, ethyl acetate, propyl acetate, acetonitrile at least one Kind.
9. a kind of preparation method of high power high-energy electrochmical power source as claimed in claim 1, comprising:
(1) each raw material is mixed, stir to paste, then apply on a current collector, drying, roll, cut, being vacuum dried preparation Become positive plate/negative plate；
(2) utilize positive plate, negative plate and barrier film preparation battery core, the positive/negative cluster in battery core be welded on lug, It is placed in shell, adds electrolyte, sealing obtains final product.
10. a kind of preparation method of high power high-energy electrochmical power source according to claim 9 is it is characterised in that step (1) in, the collector of pole piece is aluminium foil, aluminium net, porous aluminium foil or foamed aluminium；The collector of negative plate is Copper Foil, copper mesh, porous Copper Foil, foam copper, nickel foil, nickel screen, nickel foam, stainless steel foil or stainless (steel) wire.
CN201610856628.0A 2016-09-27 2016-09-27 High-power high-energy chemical power supply and preparation method thereof Pending CN106340622A (en)

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