CN103872334B - The method of positive pole aluminium foil collector performance is improved with two-step method and fluoboric acid - Google Patents

The method of positive pole aluminium foil collector performance is improved with two-step method and fluoboric acid Download PDF

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Publication number
CN103872334B
CN103872334B CN201410124795.7A CN201410124795A CN103872334B CN 103872334 B CN103872334 B CN 103872334B CN 201410124795 A CN201410124795 A CN 201410124795A CN 103872334 B CN103872334 B CN 103872334B
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aluminium foil
positive pole
conversion film
pole aluminium
foil collector
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CN103872334A (en
Inventor
童庆松
黄能贵
练冲
李秀华
任媛媛
潘国涛
吕超
吴钦缘
朱德钦
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Fujian Normal University
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Fujian Normal University
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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
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/665—Composites
    • H01M4/667—Composites in the form of layers, e.g. coatings
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
    • H01G11/66—Current collectors
    • H01G11/68—Current collectors characterised by their material
    • 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
    • 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
    • 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

Abstract

The present invention relates to the method improving positive pole aluminium foil collector performance with two-step method and fluoboric acid, it is characterized in that: aluminium foil is obtained positive pole aluminium foil collector containing conversion film respectively by deoiling step and conversion film preparation process.Described conversion film preparation process is at 35 DEG C ~ 78 DEG C temperature range process 1min ~ 30min by aluminium foil sodium fluoborate treatment fluid, wash, last natural drying or the heated air drying by 70 DEG C ~ 160 DEG C of temperature ranges, the obtained positive pole aluminium foil collector containing conversion film.When this kind of aluminum foil current collector uses in battery or ultracapacitor, have folding resistance good, with the advantage such as the cohesive force of positive electrode is strong, impedance is little, charge-discharge performance is excellent.

Description

The method of positive pole aluminium foil collector performance is improved with two-step method and fluoboric acid
Technical field
The invention belongs to technical field prepared by battery electrode, be specifically related to a kind of positive pole aluminium foil collector that can be used for lithium battery, lithium ion battery, polymer battery and ultracapacitor, that improve with two-step method and fluoboric acid.
Technical background
Lithium ion battery has that cell voltage is high, energy density is high, memory-less effect, have extended cycle life, the advantage such as self discharge is low, the performance of performance to lithium ion battery of positive electrode plays a part decision.At present, lithium ion battery is primarily of parts compositions such as organic electrolyte (polymer dielectric), barrier film, positive pole, negative pole, collectors.Because the conductive capability of the liquid state organic electrolyte (or polymer dielectric) of lithium ion battery use is more weak, in order to realize the high rate during charging-discharging of lithium ion battery, the positive electrode of lithium ion battery and negative material are generally all processed into Powdered, again the powder adhesive etc. of the powder of positive electrode or negative material is bondd on a current collector, realize the collection of electric current.Therefore, for lithium ion battery, the surface appearance of collector, collector and the contact impedance between positive electrode and negative material, collector surface appearance situation of change performance to battery in charge and discharge process have a great impact.Such as, during charging, easily there is passivation and increase polarization of electrode in the positive pole aluminium foil collector of lithium ion battery, and the charge-discharge performance of battery is obviously declined; The positive pole aluminium foil collector of lithium ion battery is bonding with between positive electrode insecure and occur the phenomenon of dry linting, affects the charge-discharge performance of battery and the fail safe of battery.
When the powder of the positive electrode of lithium ion battery and aluminum foil current collector bond, adhesive segment forms by by parts such as sticky aluminium foil, adhesive and graphite agent.Wherein every part all affects adhesive property.At present, the research processed bonded aluminium foil surface is less, mainly through in the aluminum foil current collector of lithium ion cell positive in advance graphene coated or carbon dust etc. improve the performance of aluminium foil, to realize following effect.As, suppress battery polarization, reduce thermal effect, improve high rate performance, reduce the internal resistance of cell, obviously reduce the dynamic internal resistance amplification of cyclic process; Improve battery with two side terminals, increase the cycle life of battery; Improve the adhesion of active material and collector, reduce pole piece manufacturing cost; Protection collector is not by electrolytic corrosion; Improve high temperature and the cryogenic property of ferric phosphate lithium cell, improve the processing characteristics of LiFePO4, lithium titanate material.But, the methods such as above-mentioned graphene coated in aluminum foil current collector, carbon dust are in advance for the limited use improving positive pole aluminium foil collector performance, and complicated process of preparation, cost are high, the present invention adopts simple surface-treated method to improve the surface property of lithium ion cell positive aluminum foil current collector for this reason, reduces the impedance between lithium ion cell positive aluminum foil current collector and positive electrode, reduces the dry linting phenomenon of positive pole.
Summary of the invention
For avoiding the deficiencies in the prior art, the present invention adopts simple surface-treated method to improve the surface property of lithium ion cell positive aluminum foil current collector, reduce impedance between positive pole aluminium foil collector and positive electrode, reduce positive pole dry linting phenomenon, improve battery with two side terminals, the heavy-current discharge performance of sample is significantly improved.The technical scheme adopted for realizing object of the present invention is:
Aluminium foil is obtained positive pole aluminium foil collector containing conversion film respectively by deoiling step and conversion film preparation process.
Described deoiling step be aluminium foil is placed in 65 DEG C except oil solution, process 30 seconds, metallic matrix come out.The described composition except oil solution is: Na 3pO 412H 2o40g/L, Na 2cO 315g/L, Na 2siO 39H 2o8g/L, Octylphenol polyoxyethylene ether 10g/L.
Described conversion film preparation process is that the aluminium foil through deoiling step process is placed in sodium fluoborate treatment fluid, at 35 DEG C ~ 78 DEG C temperature range process 1min ~ 30min, then rinse well with water, last natural drying or the heated air drying by 70 DEG C ~ 160 DEG C of temperature ranges, the obtained positive pole aluminium foil collector containing conversion film.
Described sodium fluoborate treatment fluid composed as follows: phosphoric acid 2g/L ~ 15g/L, sulfate 2g/L ~ 12g/L, sodium fluoborate 3g/L ~ 12g/L.
Described sulfate is sodium sulphate, potassium sulfate, calcium sulfate, zinc sulfate or magnesium sulfate.
In treatment fluid, phosphoric acid and aluminium surface react, and the porous aluminum phosphate of generation can react with sodium fluoborate the porous skin covering of the surface generated containing fluoro boron acid ion, plays a part improvement to the surface property of aluminium.Preparation containing plus plate current-collecting body as lithium ion battery of the positive pole aluminium foil collector of conversion film time, have folding resistance good, with the advantage such as the cohesive force of positive electrode is strong, impedance is little, charge-discharge performance is excellent.
Embodiment
Below in conjunction with embodiment, the present invention is further detailed.Embodiment is only supplement further of the present invention and illustrate, instead of the restriction to invention.
Embodiment 1
Aluminium foil is obtained positive pole aluminium foil collector containing conversion film respectively by deoiling step and conversion film preparation process.
Described deoiling step is placed in except oil solution by aluminium foil, process 30 seconds at 65 DEG C, metallic matrix come out.The described composition except oil solution is: Na 3pO 412H 2o40g/L, Na 2cO 315g/L, Na 2siO 39H 2o8g/L, Octylphenol polyoxyethylene ether 10g/L.
Described conversion film preparation process is that the aluminium foil through deoiling step process is placed in sodium fluoborate treatment fluid, and at 68 DEG C of process 15min, then rinse well with water, last natural drying obtains the positive pole aluminium foil collector containing conversion film.
Described sodium fluoborate treatment fluid composed as follows: phosphoric acid 5g/L, zinc sulfate 6g/L, sodium fluoborate 6g/L.
Be designated as 180 ° containing returning back to original state after the positive pole aluminium foil collector doubling 180 ° of conversion film, then roll over 180 °, be designated as 360 °, the rest may be inferred.Test shows, the positive pole aluminium foil collector containing conversion film of preparation is rolled over 7306 ° continuously and can not be fractureed.3g polyvinylidene fluoride resin is dissolved in 29ml dimethylacetylamide Making viscose.Be coated in by this viscose glue on the aluminium foil containing conversion film of preparation, the peel strength after 180 DEG C of heating 10min reaches 0.0773N/mm 2above.Applying LiFePO4 sample containing on the aluminium foil of conversion film, under 1C multiplying power electric current during discharge and recharge, the discharge capacity circulated first is higher than 146mAh/g.And the LiFePO4 sample applied on the aluminium foil without Modified Membrane process is under 1C multiplying power electric current during discharge and recharge, the discharge capacity circulated first can only reach 119mAh/g.
During containing plus plate current-collecting body as lithium ion battery of the positive pole aluminium foil of conversion film, have folding resistance good, with the advantage such as the cohesive force of positive electrode is strong, impedance is little, charge-discharge performance is excellent.
Embodiment 2
Aluminium foil is obtained positive pole aluminium foil collector containing conversion film respectively by deoiling step and conversion film preparation process.
Described deoiling step is placed in except oil solution by aluminium foil, 65 DEG C of process 30 seconds, metallic matrix come out.The described composition except oil solution is: Na 3pO 412H 2o40g/L, Na 2cO 315g/L, Na 2siO 39H 2o8g/L, Octylphenol polyoxyethylene ether 10g/L.
Described conversion film preparation process is that the aluminium foil through deoiling step process is placed in sodium fluoborate treatment fluid, at 78 DEG C of process 30min, then rinses well with water, finally uses the heated air drying of 160 DEG C, the obtained positive pole aluminium foil collector containing conversion film.
Described sodium fluoborate treatment fluid composed as follows: phosphatase 11 5g/L, magnesium sulfate 12g/L, sodium fluoborate 12g/L.
During containing plus plate current-collecting body as lithium ion battery of the positive pole aluminium foil collector of conversion film, have folding resistance good, with the advantage such as positive electrode cohesive force is strong, impedance is little, charge-discharge performance is excellent.
Embodiment 3
Aluminium foil is obtained positive pole aluminium foil collector containing conversion film respectively by deoiling step and conversion film preparation process.
Described deoiling step is at aluminium foil is placed in 65 DEG C, process in oil solution 30 seconds, metallic matrix is come out.The described composition except oil solution is: Na 3pO 412H 2o40g/L, Na 2cO 315g/L, Na 2siO 39H 2o8g/L, Octylphenol polyoxyethylene ether 10g/L.
Described conversion film preparation process is that the aluminium foil through deoiling step process is placed in sodium fluoborate treatment fluid, at 35 DEG C of process 1min, then rinses well with water, finally uses the heated air drying of 70 DEG C, the obtained positive pole aluminium foil collector containing conversion film.
Described sodium fluoborate treatment fluid composed as follows: phosphoric acid 2g/L, sodium sulphate 2g/L, sodium fluoborate 3g/L.
During containing plus plate current-collecting body as lithium ion battery of the positive pole aluminium foil of conversion film, have folding resistance good, with the advantage such as the cohesive force of positive electrode is strong, impedance is little, charge-discharge performance is excellent.
Embodiment 4
Aluminium foil is obtained positive pole aluminium foil collector containing conversion film respectively by deoiling step and conversion film preparation process.
Described deoiling step is placed in except oil solution by aluminium foil, processes 30 seconds, metallic matrix is come out at 65 DEG C.The described composition except oil solution is: Na 3pO 412H 2o40g/L, Na 2cO 315g/L, Na 2siO 39H 2o8g/L, Octylphenol polyoxyethylene ether 10g/L.
Described conversion film preparation process is that the aluminium foil through deoiling step process is placed in sodium fluoborate treatment fluid, at 78 DEG C of process 1min, then rinses well with water, finally uses the heated air drying of 100 DEG C, the obtained positive pole aluminium foil collector containing conversion film.
Described sodium fluoborate treatment fluid composed as follows: phosphoric acid 2g/L, zinc sulfate 12g/L, sodium fluoborate 12g/L.
During containing plus plate current-collecting body as lithium ion battery of the positive pole aluminium foil of conversion film, have folding resistance good, with the advantage such as the cohesive force of positive electrode is strong, impedance is little, charge-discharge performance is excellent.
Embodiment 5
Aluminium foil is obtained positive pole aluminium foil collector containing conversion film respectively by deoiling step and conversion film preparation process.
Described deoiling step is at aluminium foil is placed in 65 DEG C, process in oil solution 30 seconds, metallic matrix is come out.The described composition except oil solution is: Na 3pO 412H 2o40g/L, Na 2cO 315g/L, Na 2siO 39H 2o8g/L, Octylphenol polyoxyethylene ether 10g/L.
Described conversion film preparation process is that the aluminium foil through deoiling step process is placed in sodium fluoborate treatment fluid, at 35 DEG C of process 30min, then rinses well with water, finally uses the heated air drying of 138 DEG C, the obtained aluminium foil containing conversion film.
Described sodium fluoborate treatment fluid composed as follows: phosphatase 11 5g/L, zinc sulfate 2g/L, sodium fluoborate 3g/L.
During containing plus plate current-collecting body as lithium ion battery of the positive pole aluminium foil of conversion film, have folding resistance good, with the advantage such as the cohesive force of positive electrode is strong, impedance is little, charge-discharge performance is excellent.
Embodiment 6
Aluminium foil is obtained positive pole aluminium foil collector containing conversion film respectively by deoiling step and conversion film preparation process.
Described deoiling step is placed in except oil solution by aluminium foil, 65 DEG C of process 30 seconds, metallic matrix come out.The described composition except oil solution is: Na 3pO 412H 2o40g/L, Na 2cO 315g/L, Na 2siO 39H 2o8g/L, Octylphenol polyoxyethylene ether 10g/L.
Described conversion film preparation process is that the aluminium foil through deoiling step process is placed in sodium fluoborate treatment fluid, at 66 DEG C of process 7min, then rinses well with water, finally uses 80 DEG C of heated air dryings, the obtained positive pole aluminium foil collector containing conversion film.
Described sodium fluoborate treatment fluid composed as follows: phosphoric acid 5g/L, potassium sulfate 2g/L, sodium fluoborate 3g/L.
During the plus plate current-collecting body of the obtained positive pole aluminium foil collector containing conversion film as lithium ion battery, have folding resistance good, with the advantage such as the cohesive force of positive electrode is strong, impedance is little, charge-discharge performance is excellent.
Embodiment 7
Aluminium foil is obtained positive pole aluminium foil collector containing conversion film respectively by deoiling step and conversion film preparation process.
Described deoiling step is placed in except oil solution by aluminium foil, processes 30 seconds, metallic matrix is come out at 65 DEG C.The described composition except oil solution is: Na 3pO 412H 2o40g/L, Na 2cO 315g/L, Na 2siO 39H 2o8g/L, Octylphenol polyoxyethylene ether 10g/L.
Described conversion film preparation process is that the aluminium foil through deoiling step process is placed in sodium fluoborate treatment fluid, at 35 DEG C of process 2min, then rinses well with water, finally uses the heated air drying of 77 DEG C, the obtained positive pole aluminium foil collector containing conversion film.
Described sodium fluoborate treatment fluid composed as follows: phosphoric acid 2g/L, calcium sulfate 10g/L, sodium fluoborate 7g/L.
During the plus plate current-collecting body of the obtained positive pole aluminium foil collector containing conversion film as lithium ion battery, have folding resistance good, with the advantage such as the cohesive force of positive electrode is strong, impedance is little, charge-discharge performance is excellent.

Claims (3)

1. improve the method for positive pole aluminium foil collector performance with two-step method and fluoboric acid, it is characterized in that: aluminium foil is obtained positive pole aluminium foil collector containing conversion film respectively by deoiling step and conversion film preparation process;
Described deoiling step is placed in except oil solution by aluminium foil, 65 DEG C of process 30 seconds, metallic matrix come out; The described composition except oil solution is: Na 3pO 412H 2o40g/L, Na 2cO 315g/L, Na 2siO 39H 2o8g/L, Octylphenol polyoxyethylene ether 10g/L;
Described conversion film preparation process is that the aluminium foil through deoiling step process is placed in sodium fluoborate treatment fluid; at 35 DEG C ~ 78 DEG C temperature range process 1min ~ 30min; rinse well with water; last natural drying or the heated air drying by 70 DEG C ~ 160 DEG C of temperature ranges, the obtained positive pole aluminium foil collector containing conversion film;
Described sodium fluoborate treatment fluid composed as follows: phosphoric acid 2g/L ~ 15g/L, sulfate 2g/L ~ 12g/L, sodium fluoborate 3g/L ~ 12g/L.
2. two-step method according to claim 1 and fluoboric acid improve the method for positive pole aluminium foil collector performance, it is characterized in that described sulfate is sodium sulphate, potassium sulfate, calcium sulfate, zinc sulfate or magnesium sulfate.
3. two-step method according to claim 1 and fluoboric acid improve the method for positive pole aluminium foil collector performance, it is characterized in that the described positive pole aluminium foil collector containing conversion film is for lithium battery, lithium ion battery, polymer battery or ultracapacitor.
CN201410124795.7A 2014-03-31 2014-03-31 The method of positive pole aluminium foil collector performance is improved with two-step method and fluoboric acid Expired - Fee Related CN103872334B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107634227B (en) * 2017-08-21 2020-07-03 清华大学 Aluminum current collector and method for manufacturing the same, and lithium secondary battery and method for manufacturing the same
CN109390550A (en) * 2018-10-24 2019-02-26 遵义源创生产力促进中心有限公司 A kind of positive pole aluminium foil collector performance improvement method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1434150A (en) * 2002-01-25 2003-08-06 肖银华 Method for preparing green environment protection type normal temp. liquid phosphide
CN103620839A (en) * 2011-06-21 2014-03-05 海德鲁铝业钢材有限公司 Chemically treated current collector foil produced of aluminum or an aluminum alloy

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1434150A (en) * 2002-01-25 2003-08-06 肖银华 Method for preparing green environment protection type normal temp. liquid phosphide
CN103620839A (en) * 2011-06-21 2014-03-05 海德鲁铝业钢材有限公司 Chemically treated current collector foil produced of aluminum or an aluminum alloy

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