CN109943879A - New-energy automobile continuation of the journey Fabrication of High Specific Capacitance middle-high voltage electrode foil and its production method - Google Patents
New-energy automobile continuation of the journey Fabrication of High Specific Capacitance middle-high voltage electrode foil and its production method Download PDFInfo
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Abstract
The present invention discloses a kind of new-energy automobile continuation of the journey Fabrication of High Specific Capacitance middle-high voltage electrode foil and its production method and obtains new-energy automobile continuation of the journey Fabrication of High Specific Capacitance middle-high voltage electrode foil by oil removing polishing, electrochemical corrosion pore-forming, chemical attack reaming and lithium salts pretreatment.Compared with prior art; production method preparation process of the invention is simple; electrolytic etching pore-forming is carried out using intermittent pulses energization to combine with chemical attack reaming; the advantages of having taken into account two kinds of technique; uniform, aperture, the electrode foil that hole depth is controllable and mechanical performance is strong with pore size have been obtained, electrode foil has been pre-processed by lithium salts dipping, both can avoid introducing foreign ion; so that its surface is formed one layer of fine and close protective film, the corrosion reaction of aluminum substrate can be effectively suppressed.The electrode foil product structure performance of this method preparation is stablized, and has the characteristics that large specific surface area, thermostabilization be good and good corrosion resistance, can effectively improve the specific volume and stability of capacitor, extend the service life of capacitor.
Description
Technical field
The present invention relates to electrode foils to corrode preparation field, in particular to a kind of new-energy automobile continuation of the journey Fabrication of High Specific Capacitance mesohigh
Electrode foil and its production method.
Background technique
In recent years, right along with the development of portable electronic device (phone, computer, video camera etc.) and new-energy automobile
Increasingly increase in the demand for the battery for being used as driving power.Lithium ion power automobile is one of representative of new-energy automobile.And lithium
The key technology of ion power vehicle is lithium ion battery, and matrix of the aluminum electric pole foil as positive electrode is used in lithium ion battery
Material.
The positive electrode institute that the collector that the anode of lithium ion battery uses is generally aluminum electric pole foil and is coated on
Composition.However, the combination between the smooth aluminium foil and positive electrode in surface more relaxes, it is easy in processing and charge and discharge process
Active material occurs to fall off or lose powder phenomenon, reduces cycle charge discharge electrical efficiency and battery life, the contact between increase component
Resistance causes positive plate electric conductivity to decline, to affect the comprehensive performance of battery, corrosion aluminium is prepared using chemical attack
Foil is crisp, and mechanical strength is low, and pore size is uneven, and the depth and size of borrosion hole are also uncontrollable, and the form in hole and distribution
Mode influences the capacity and buckling performance of electrode foil in turn, and in battery use process, electrode foil, which exists, applies it
Risk active positive electrode material corrosion or corroded by the electrolyte solution in battery, so as to cause self-discharge of battery.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of high-rate lithium battery anode and lithium battery, with solve can
The specific surface area of electrode foil is effectively improved, and is able to maintain the intensity and capacity of electrode foil, and effectively inhibits electrolyte solution to electricity
The corrosion of pole foil improves corrosion proof problem.
A kind of new-energy automobile continuation of the journey production method of Fabrication of High Specific Capacitance middle-high voltage electrode foil, key are to include following step
It is rapid:
Step 1: aluminium foil is stand-by after oil removing, polishing, cleaning；
Electricity is carried out using discontinuity pulse electrifying mode Step 2: aluminium foil made from step 1 is placed in acidic electrolysis bath
After solution corrosion, cleaning obtains the micropore aluminium foil in a length of 5-100 μm of surface micropore hole；
Step 3: being cleaned and dried, obtaining after micropore aluminium foil made from step 2 is placed in expanding agent carrying out immersion reaming
The micropore aluminium foil that surface micropore aperture is 0.1-50 μm；
Step 4: be cleaned and dried after micropore aluminium foil made from step 3 is placed in lithium salts passivator carrying out dipping passivation,
Obtain the new-energy automobile continuation of the journey Fabrication of High Specific Capacitance middle-high voltage electrode foil that surface forms resist layer.
Preferably, acidic electrolysis bath is aqueous hydrochloric acid solution that mass fraction is 0.5-10%wt in the step 2.
Preferably, discontinuity pulse electrifying mode in the step 2 are as follows: corrosion current 3-8A, conduction time 18-
45s, power-off time 0.1s, electricity 5-12C/cm2。
Preferably, the expanding agent in the step 3 is the aqueous solution of nitric acid that mass fraction is 0.1-5%wt.
Preferably, the dipping temperature in the step 3 is 45-65 DEG C, dip time 30-60min.
Preferably, the lithium salts passivator in the step 4 is the lithium carbonate aqueous solution that mass concentration is 5-10g/L.It is preferred that
, the dipping temperature in the step 4 is 20-35 DEG C, dip time 3-10min.
A kind of new-energy automobile continuation of the journey Fabrication of High Specific Capacitance middle-high voltage electrode foil, key are: the new-energy automobile continuation of the journey is used
Fabrication of High Specific Capacitance middle-high voltage electrode foil method described in any of the above item is prepared, including is formed on micropore aluminium foil and micropore aluminium foil
Resist layer.
Preferably, the resist layer with a thickness of 5-50nm.
The utility model has the advantages that compared with prior art, the present invention provides a kind of new-energy automobile continuation of the journey Fabrication of High Specific Capacitance mesohighs
The production method preparation process of electrode foil is simple, and intermittent pulses are powered and carry out electrolytic etching pore-forming and chemical attack reaming knot
Altogether, the advantages of having taken into account two kinds of technique has obtained with pore size is uniform, aperture, hole depth is controllable and mechanical performance is strong
Electrode foil, by lithium salts dipping electrode foil is pre-processed, both can avoid introduce foreign ion, also made its surface formed one
The fine and close protective film of layer, can be effectively suppressed the corrosion reaction of aluminum substrate.Fabrication of High Specific Capacitance is used in the new-energy automobile continuation of the journey of this method preparation
Middle-high voltage electrode foil is at low cost, and product structure performance is stablized, and has large specific surface area, thermostabilization good and the spy of good corrosion resistance
Point, can effectively improve the specific volume and stability of capacitor, to extend the service life of capacitor.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, With reference to embodiment to this
Invention elaborates.
1 new-energy automobile of the embodiment continuation of the journey production of Fabrication of High Specific Capacitance middle-high voltage electrode foil I
Step 1: aluminium foil is first used washes of absolute alcohol with oil removing, it is pure to be then placed in the perchloric acid analysis that volume ratio is 1:3
It is processed by shot blasting in pure mixed liquor with ethanol analysis, polish temperature is 0 DEG C, polishing time 10min, recycles deionization
It is stand-by after water ultrasonic cleaning；
Step 2: aluminium foil made from step 1 is placed in the aqueous hydrochloric acid solution that mass fraction is 0.5%wt, in discontinuity
Carry out electrolytic etching under pulse electrifying mode, corrosion current 3A, conduction time 18s, power-off time 0.1s, electricity is
5C/cm2, then cleaned using deionized water, obtain the micropore aluminium foil in a length of 5 μm of the surface micropore hole of arranging rule；
It is carried out Step 3: micropore aluminium foil made from step 2 is placed in the aqueous solution of nitric acid that mass fraction is 0.1%wt
Reaming is impregnated, dipping temperature is 45 DEG C, and then dip time 30min is cleaned with deionized water, be dried in vacuo at 25 DEG C
2h obtains the micropore aluminium foil that surface micropore aperture is 0.1 μm；
It is soaked Step 4: micropore aluminium foil made from step 3 is placed in the lithium carbonate aqueous solution that mass concentration is 5g/L
Stain passivation, dipping temperature are 20 DEG C, and then dip time 3min is successively cleaned with deionized water, acetone, the vacuum at 25 DEG C
Dry 2h obtains the new-energy automobile continuation of the journey Fabrication of High Specific Capacitance middle-high voltage electrode foil I that surface forms resist layer.
2 new-energy automobile of the embodiment continuation of the journey production of Fabrication of High Specific Capacitance middle-high voltage electrode foil II
Step 1: aluminium foil is first used washes of absolute alcohol with oil removing, it is pure to be then placed in the perchloric acid analysis that volume ratio is 1:3
It is processed by shot blasting in pure mixed liquor with ethanol analysis, polish temperature is 5 DEG C, polishing time 30min, recycles deionization
It is stand-by after water ultrasonic cleaning；
Step 2: aluminium foil made from step 1 is placed in the aqueous hydrochloric acid solution that mass fraction is 10%wt, in discontinuity
Carry out electrolytic etching under pulse electrifying mode, corrosion current 8A, conduction time 45s, power-off time 0.1s, electricity is
12C/cm2, then cleaned using deionized water, obtain the micropore aluminium foil in a length of 100 μm of the surface micropore hole of arranging rule；
It is soaked Step 3: micropore aluminium foil made from step 2 is placed in the aqueous solution of nitric acid that mass fraction is 5%wt
Reaming is steeped, dipping temperature is 65 DEG C, then dip time 60min is cleaned with deionized water, it is dried in vacuo 2h at 25 DEG C,
Obtain the micropore aluminium foil that surface micropore aperture is 50 μm；
It is carried out Step 4: micropore aluminium foil made from step 3 is placed in the lithium carbonate aqueous solution that mass concentration is 10g/L
Dipping passivation, dipping temperature are 35 DEG C, and then dip time 10min is successively cleaned with deionized water, acetone, at 25 DEG C
It is dried in vacuo 2h, obtains the new-energy automobile continuation of the journey Fabrication of High Specific Capacitance middle-high voltage electrode foil II that surface forms resist layer.
3 new-energy automobile of the embodiment continuation of the journey production of Fabrication of High Specific Capacitance middle-high voltage electrode foil III
Step 1: aluminium foil is first used washes of absolute alcohol with oil removing, it is pure to be then placed in the perchloric acid analysis that volume ratio is 1:3
It is processed by shot blasting in pure mixed liquor with ethanol analysis, polish temperature is 3 DEG C, polishing time 20min, recycles deionization
It is stand-by after water ultrasonic cleaning；
Step 2: aluminium foil made from step 1 is placed in the aqueous hydrochloric acid solution that mass fraction is 4%wt, in discontinuity arteries and veins
It rushes and carries out electrolytic etching under powered-on mode, corrosion current 6A, conduction time 30s, power-off time 0.1s, electricity 10C/
cm2, then cleaned using deionized water, obtain the micropore aluminium foil in a length of 10 μm of the surface micropore hole of arranging rule；
It is soaked Step 3: micropore aluminium foil made from step 2 is placed in the aqueous solution of nitric acid that mass fraction is 2%wt
Reaming is steeped, dipping temperature is 55 DEG C, then dip time 45min is cleaned with deionized water, it is dried in vacuo 2h at 25 DEG C,
Obtain the micropore aluminium foil that surface micropore aperture is 10 μm；
It is soaked Step 4: micropore aluminium foil made from step 3 is placed in the lithium carbonate aqueous solution that mass concentration is 6g/L
Stain passivation, dipping temperature are 30 DEG C, and then dip time 5min is successively cleaned with deionized water, acetone, the vacuum at 25 DEG C
Dry 2h obtains the new-energy automobile continuation of the journey Fabrication of High Specific Capacitance middle-high voltage electrode foil III that surface forms resist layer.
4 comparative example of embodiment
Equipment and operation are with embodiment 3, the difference is that step 4 will directly be carried out after the progress step 1 processing of smooth aluminium foil
Processing, obtains electrode foil IV.
5 comparative example of embodiment
Using without pretreated smooth aluminium foil as electrode foil V.
Electrode foil is prepared to each embodiment and carries out electrochemical property test:
The cell I-V for the electrode foil preparation that each embodiment is prepared, using lithium piece as battery cathode, 1M LiPF6 electrolysis
Liquid and fibreglass diaphragm are assembled into battery I-IV, and using blue electrical measurement test system, test result is as shown in table 1.
Cyclic voltammetry: voltage scan range 3-5V, scanning speed 5mV/s；
Specific discharge capacity test: by manufactured battery with 0.1c electric current charging 4 hours, then again constant-voltage charge to 3.8v；
It shelves after twenty minutes, then is discharged to 3.0 volts from 3.8 volts with the electric current of 0.1C, record the discharge capacity for the first time of battery；
The multiplying power of simulated battery is tested: testing 0.5C, the specific discharge capacity of 1C, 3C respectively.
The electrochemical property test Comparative result of each battery I-IV of table 1
Finally it is to be appreciated that foregoing description is merely a preferred embodiment of the present invention, those skilled in the art is in the present invention
Enlightenment under, without prejudice to the purpose of the present invention and the claims, multiple similar expressions, such change can be made
It changes and falls within the scope of protection of the present invention.
Claims (9)
1. the production method that Fabrication of High Specific Capacitance middle-high voltage electrode foil is used in a kind of new-energy automobile continuation of the journey, it is characterised in that including following step
It is rapid:
Step 1: aluminium foil is stand-by after oil removing, polishing, cleaning；
Electrolysis corruption is carried out using discontinuity pulse electrifying mode Step 2: aluminium foil made from step 1 is placed in acidic electrolysis bath
After erosion, cleaning obtains the micropore aluminium foil in a length of 5-100 μm of surface micropore hole；
Step 3: being cleaned and dried after aluminium foil made from step 2 is placed in expanding agent carrying out immersion reaming, obtaining surface micropore
The micropore aluminium foil that aperture is 0.1-50 μm；
Step 4: being cleaned and dried, obtaining after micropore aluminium foil made from step 3 is placed in lithium salts passivator carrying out dipping passivation
Surface forms the new-energy automobile continuation of the journey Fabrication of High Specific Capacitance middle-high voltage electrode foil of resist layer.
2. the new-energy automobile continuation of the journey according to claim 1 production method of Fabrication of High Specific Capacitance middle-high voltage electrode foil, feature
Be: acidic electrolysis bath is the aqueous hydrochloric acid solution that mass fraction is 0.5-10%wt in the step 2.
3. the new-energy automobile continuation of the journey according to claim 1 or 2 production method of Fabrication of High Specific Capacitance middle-high voltage electrode foil, special
Sign is discontinuity pulse electrifying mode in the step 2 are as follows: corrosion current 3-8A, conduction time 18-45s, when power-off
Between be 0.1s, electricity 5-12C/cm2。
4. the new-energy automobile continuation of the journey according to claim 3 production method of Fabrication of High Specific Capacitance middle-high voltage electrode foil, feature
It is that the expanding agent in the step 3 is the aqueous solution of nitric acid that mass fraction is 0.1-5%wt.
5. the new-energy automobile continuation of the journey according to claim 4 production method of Fabrication of High Specific Capacitance middle-high voltage electrode foil, feature
It is that the dipping temperature in the step 3 is 45-65 DEG C, dip time 30-60min.
6. according to claim 1,4 or 5 described in any item new-energy automobile continuations of the journey production of Fabrication of High Specific Capacitance middle-high voltage electrode foil
Method, it is characterised in that the lithium salts passivator in the step 4 is the lithium carbonate aqueous solution that mass concentration is 5-10g/L.
7. the new-energy automobile continuation of the journey according to claim 6 production method of Fabrication of High Specific Capacitance middle-high voltage electrode foil, feature
It is that the dipping temperature in the step 4 is 20-35 DEG C, dip time 3-10min.
8. a kind of new-energy automobile continuation of the journey Fabrication of High Specific Capacitance middle-high voltage electrode foil, it is characterised in that: the new-energy automobile continuation of the journey is used
Fabrication of High Specific Capacitance middle-high voltage electrode foil is prepared by the described in any item methods of claim 1-7, including micropore aluminium foil and micropore aluminium
The resist layer formed on foil.
9. new-energy automobile continuation of the journey Fabrication of High Specific Capacitance middle-high voltage electrode foil according to claim 8, it is characterised in that: described anti-
Lose layer with a thickness of 5-50nm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910255306.4A CN109943879A (en) | 2019-04-01 | 2019-04-01 | New-energy automobile continuation of the journey Fabrication of High Specific Capacitance middle-high voltage electrode foil and its production method |
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| CN201910255306.4A CN109943879A (en) | 2019-04-01 | 2019-04-01 | New-energy automobile continuation of the journey Fabrication of High Specific Capacitance middle-high voltage electrode foil and its production method |
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|---|---|---|---|---|
| CN107313108A (en) * | 2017-06-16 | 2017-11-03 | 李晓天 | A kind of aluminium electrolutic capacitor high voltage ultra-thin electrode foil and preparation method thereof |
| CN108155017A (en) * | 2016-12-02 | 2018-06-12 | 东莞东阳光科研发有限公司 | A kind of processing method of electrode foil for aluminum electrolytic capacitors |
| CN207573243U (en) * | 2017-08-02 | 2018-07-03 | 新疆众和股份有限公司 | Pulse voltage type is melted into power supply |
| CN108538600A (en) * | 2018-05-10 | 2018-09-14 | 广西贺州市桂东电子科技有限责任公司 | A kind of aluminium electroloysis mesohigh anode foils nitration mixture reaming caustic solution |
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2019
- 2019-04-01 CN CN201910255306.4A patent/CN109943879A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108155017A (en) * | 2016-12-02 | 2018-06-12 | 东莞东阳光科研发有限公司 | A kind of processing method of electrode foil for aluminum electrolytic capacitors |
| CN107313108A (en) * | 2017-06-16 | 2017-11-03 | 李晓天 | A kind of aluminium electrolutic capacitor high voltage ultra-thin electrode foil and preparation method thereof |
| CN207573243U (en) * | 2017-08-02 | 2018-07-03 | 新疆众和股份有限公司 | Pulse voltage type is melted into power supply |
| CN108538600A (en) * | 2018-05-10 | 2018-09-14 | 广西贺州市桂东电子科技有限责任公司 | A kind of aluminium electroloysis mesohigh anode foils nitration mixture reaming caustic solution |
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