CN103840169B - The preparation method of positive pole aluminium foil collector performance is improved with fluoboric acid - Google Patents

The preparation method of positive pole aluminium foil collector performance is improved with fluoboric acid Download PDF

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Publication number
CN103840169B
CN103840169B CN201410125066.3A CN201410125066A CN103840169B CN 103840169 B CN103840169 B CN 103840169B CN 201410125066 A CN201410125066 A CN 201410125066A CN 103840169 B CN103840169 B CN 103840169B
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China
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aluminium foil
positive pole
pole aluminium
foil collector
preparation
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CN103840169A (en
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童庆松
吕超
朱德钦
李秀华
任媛媛
潘国涛
吴钦缘
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Fujian Normal University
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Fujian Normal University
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/64Carriers or collectors
    • H01M4/66Selection of materials
    • H01M4/661Metal or alloys, e.g. alloy coatings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/64Carriers or collectors
    • H01M4/66Selection of materials
    • H01M4/665Composites
    • H01M4/667Composites in the form of layers, e.g. coatings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Cell Electrode Carriers And Collectors (AREA)

Abstract

The present invention relates to improve the preparation method of positive pole aluminium foil collector performance with fluoboric acid, it is characterized in that: aluminium foil Sodium fluoroborate treatment fluid is processed 1min~30 min at 35 DEG C~78 DEG C of temperature ranges, rinse well with water, last natural drying or the hot-air dry by 70 DEG C~160 DEG C temperature ranges, prepare the positive pole aluminium foil collector containing conversion film.When positive pole aluminium foil collector containing conversion film uses in battery or ultracapacitor, there is the advantages such as good and positive electrode the cohesive force of folding resistance is strong, impedance is little, charge-discharge performance is excellent.

Description

The preparation method of positive pole aluminium foil collector performance is improved with 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, improve performance with fluoboric acid.
Technical background
Lithium ion battery have cell voltage height, energy density height, memory-less effect, have extended cycle life, the advantage such as self discharge is low, the performance of positive electrode plays a part decision to the performance of lithium ion battery.At present, lithium ion battery is mainly made up of parts such as organic electrolyte (polymer dielectric), barrier film, positive pole, negative pole, collectors.Owing to 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 the most all processed into powder, again the powder of positive electrode or the powder binding agent etc. of negative material are bondd on a current collector, it is achieved the collection of electric current.Therefore, for lithium ion battery, the performance of battery is had a great impact by contact impedance, collector surface appearance situation of change in charge and discharge process between the surface appearance of collector, collector and positive electrode and negative material.Such as, during charging, the positive pole aluminium foil collector of lithium ion battery is susceptible to passivation and increases polarization of electrode, makes the charge-discharge performance of battery be decreased obviously;The positive pole aluminium foil collector of lithium ion battery is bonding with between positive electrode insecure and the phenomenon of dry linting occurs, affects the charge-discharge performance of battery and the safety of battery.
When the powder of the positive electrode of lithium ion battery bonds with aluminum foil current collector, adhesive segment is formed by by parts such as viscous aluminium foil, adhesive and graphite agent.Each of which part all affects adhesive property.At present, the research to being processed by bonding aluminium foil surface is less, the main performance being improved aluminium foil by the most graphene coated in the aluminum foil current collector of lithium ion cell positive or carbon dust etc., to realize following effect.As, suppress battery polarization, reduce heat effect, improve high rate performance, reduce the internal resistance of cell, hence it is evident that 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 substance 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 in advance are for improving the limited use of positive pole aluminium foil collector performance, and complicated process of preparation, cost are high, the method using simple surface to process for this present invention improves the surface property of lithium ion cell positive aluminum foil current collector, 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 method that the present invention uses simple surface to process improves the surface property of lithium ion cell positive aluminum foil current collector, reduce impedance between positive pole aluminium foil collector and positive electrode, minimizing positive pole dry linting phenomenon, improve battery with two side terminals, make the heavy-current discharge performance of sample significantly improve.Be the technical scheme is that by realizing the purpose of the present invention
Aluminium foil Sodium fluoroborate treatment fluid is processed 1min~30 min at 35 DEG C~78 DEG C of temperature ranges, then rinses well with water, last natural drying or the hot-air dry by 70 DEG C~160 DEG C temperature ranges, prepare the positive pole aluminium foil collector containing conversion film.
The composition of described Sodium fluoroborate treatment fluid is as follows: phosphoric acid 2 g/L~15g/L, sulfate 2 g/L~12g/L, Sodium fluoroborate 3 g/L~12g/L.
Described sulfate is sodium sulfate, potassium sulfate, calcium sulfate, zinc sulfate or magnesium sulfate.
In treatment fluid, phosphoric acid reacts with aluminum surface, and the porous aluminum phosphate of generation can react with Sodium fluoroborate and generate the porous skin covering of the surface containing fluoro boron acid ion, and the surface property of aluminum is played a part improvement.When positive pole aluminium foil collector containing conversion film is as the plus plate current-collecting body of lithium ion battery, there is the advantages such as good and positive electrode the cohesive force of folding resistance is strong, impedance is little, charge-discharge performance is excellent.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further detailed.Embodiment is only supplementing further and illustrating rather than to the restriction invented the present invention.
Embodiment 1
Aluminium foil Sodium fluoroborate treatment fluid is processed 15min at 68 DEG C, then rinses well with water, last natural drying, prepare the positive pole aluminium foil collector containing conversion film.
The composition of described Sodium fluoroborate treatment fluid is as follows: phosphoric acid 5 g/L, zinc sulfate 6 g/L, Sodium fluoroborate 6 g/L.
Returning back to original state after positive pole aluminium foil collector doubling 180 ° containing conversion film and be designated as 180 °, 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 rolls over 7306 ° continuously, will not fracture.3g polyvinylidene fluoride resin is dissolved in 29ml dimethyl acetylamide and prepares viscose glue.Being coated on the aluminium foil containing conversion film by this viscose glue, the peel strength after 180 DEG C of heating 10min reaches 0.0773 N/mm2Above.Coating LiFePO4 sample on the aluminium foil containing conversion film, under 2C multiplying power electric current during discharge and recharge, the discharge capacity circulated first is higher than 131mAh/g.And on the aluminium foil processed without Modified Membrane, coat LiFePO4 sample, under same current, the discharge capacity circulated first can only achieve 106mAh/g.
When the positive pole aluminium foil collector containing conversion film of preparation is as the plus plate current-collecting body of lithium ion battery, there is the advantages such as good and positive electrode the cohesive force of folding resistance is strong, impedance is little, charge-discharge performance is excellent.
Embodiment 2
Aluminium foil Sodium fluoroborate treatment fluid is processed 30 min at 78 DEG C, then rinses well with water, finally with the hot-air dry of 160 DEG C, prepare the positive pole aluminium foil collector containing conversion film.
The composition of described Sodium fluoroborate treatment fluid is as follows: phosphatase 11 5g/L, magnesium sulfate 12g/L, Sodium fluoroborate 12g/L.
The positive pole aluminium foil collector containing conversion film of preparation, as the plus plate current-collecting body of lithium ion battery, has the advantages such as folding resistance is good and positive electrode cohesive force is strong, impedance is little, charge-discharge performance is excellent.
Embodiment 3
Aluminium foil Sodium fluoroborate treatment fluid is processed 1min at 35 DEG C, then rinses well with water, finally with the hot-air dry of 70 DEG C, prepare the positive pole aluminium foil collector containing conversion film.
The composition of described Sodium fluoroborate treatment fluid is as follows: phosphoric acid 2 g/L, sodium sulfate 2 g/L, Sodium fluoroborate 3 g/L.
When the positive pole aluminium foil collector containing conversion film of preparation is as the plus plate current-collecting body of lithium ion battery, there is the advantages such as good and positive electrode the cohesive force of folding resistance is strong, impedance is little, charge-discharge performance is excellent.
Embodiment 4
Aluminium foil Sodium fluoroborate treatment fluid is processed 1min at 78 DEG C, then rinses well with water, finally with the hot-air dry of 100 DEG C, prepare the positive pole aluminium foil collector containing conversion film.
The composition of described Sodium fluoroborate treatment fluid is as follows: phosphoric acid 2 g/L, zinc sulfate 12g/L, Sodium fluoroborate 12g/L.
When the positive pole aluminium foil collector containing conversion film of preparation is as the plus plate current-collecting body of lithium ion battery, there is the advantages such as good and positive electrode the cohesive force of folding resistance is strong, impedance is little, charge-discharge performance is excellent.
Embodiment 5
Aluminium foil Sodium fluoroborate treatment fluid is processed 30 min at 35 DEG C, then rinses well with water, finally with the hot-air dry of 138 DEG C, prepare the positive pole aluminium foil collector containing conversion film.
The composition of described Sodium fluoroborate treatment fluid is as follows: phosphatase 11 5g/L, zinc sulfate 2 g/L, Sodium fluoroborate 3 g/L.
When the positive pole aluminium foil collector containing conversion film of preparation is as the plus plate current-collecting body of lithium ion battery, there is the advantages such as good and positive electrode the cohesive force of folding resistance is strong, impedance is little, charge-discharge performance is excellent.
Embodiment 6
Aluminium foil Sodium fluoroborate treatment fluid is processed 7min at 66 DEG C, then rinses well with water, finally with 80 DEG C of hot-air dries, prepare the positive pole aluminium foil collector containing conversion film.
The composition of described Sodium fluoroborate treatment fluid is as follows: phosphoric acid 5 g/L, potassium sulfate 7 g/L, Sodium fluoroborate 5 g/L.
When the positive pole aluminium foil collector containing conversion film of preparation is as the plus plate current-collecting body of lithium ion battery, there is the advantages such as good and positive electrode the cohesive force of folding resistance is strong, impedance is little, charge-discharge performance is excellent.
Embodiment 7
Aluminium foil Sodium fluoroborate treatment fluid is processed 2min at 35 DEG C, then rinses well with water, finally with the hot-air dry of 77 DEG C, prepare the positive pole aluminium foil collector containing conversion film.
The composition of described Sodium fluoroborate treatment fluid is as follows: phosphoric acid 2 g/L, calcium sulfate 10 g/L, Sodium fluoroborate 7 g/L.
When the positive pole aluminium foil collector containing conversion film of preparation is as the plus plate current-collecting body of lithium ion battery, there is the advantages such as good and positive electrode the cohesive force of folding resistance is strong, impedance is little, charge-discharge performance is excellent.

Claims (3)

1. the preparation method of positive pole aluminium foil collector performance is improved with fluoboric acid, it is characterised in that: aluminium foil Sodium fluoroborate treatment fluid is processed 1min~30 at 35 DEG C~78 DEG C of temperature ranges Min, rinses well with water, last natural drying or the hot-air dry by 70 DEG C~160 DEG C temperature ranges, prepares the positive pole aluminium foil collector containing conversion film;
The composition of described Sodium fluoroborate treatment fluid is as follows: phosphoric acid 2 g/L~15g/L, sulfate 2 G/L~12g/L, Sodium fluoroborate 3 g/L~12g/L.
Fluoboric acid the most according to claim 1 improves the preparation method of positive pole aluminium foil collector performance, it is characterised in that described sulfate is sodium sulfate, potassium sulfate, calcium sulfate, zinc sulfate or magnesium sulfate.
Fluoboric acid the most according to claim 1 improves the preparation method of positive pole aluminium foil collector performance, it is characterised in that the described positive pole aluminium foil collector containing conversion film is for lithium battery, lithium ion battery, polymer battery or ultracapacitor.
CN201410125066.3A 2014-03-31 2014-03-31 The preparation method of positive pole aluminium foil collector performance is improved with fluoboric acid Expired - Fee Related CN103840169B (en)

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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
CN109346724A (en) * 2018-10-24 2019-02-15 遵义源创生产力促进中心有限公司 A kind of fluoboric acid improvement positive pole aluminium foil collector performance methodology

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CN1434150A (en) * 2002-01-25 2003-08-06 肖银华 Method for preparing green environment protection type normal temp. liquid phosphide
CN101525746A (en) * 2009-04-22 2009-09-09 湖南大学 Preparation method of tungstate conversion film on surface of aluminum alloy
CN102242364A (en) * 2011-06-23 2011-11-16 沈阳理工大学 Preparation method of ceramic film through chemical conversion and micro-arc oxidation of aluminum and aluminum alloy

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CN1310262C (en) * 2003-07-08 2007-04-11 深圳市东阳光化成箔股份有限公司 Methof for manufacturing foil of cathode of electrolytic capacitor
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CN1434150A (en) * 2002-01-25 2003-08-06 肖银华 Method for preparing green environment protection type normal temp. liquid phosphide
CN101525746A (en) * 2009-04-22 2009-09-09 湖南大学 Preparation method of tungstate conversion film on surface of aluminum alloy
CN102242364A (en) * 2011-06-23 2011-11-16 沈阳理工大学 Preparation method of ceramic film through chemical conversion and micro-arc oxidation of aluminum and aluminum alloy

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