CN104821381A - Preparation method of lithium ion battery diaphragm - Google Patents
Preparation method of lithium ion battery diaphragm Download PDFInfo
- Publication number
- CN104821381A CN104821381A CN201510164745.6A CN201510164745A CN104821381A CN 104821381 A CN104821381 A CN 104821381A CN 201510164745 A CN201510164745 A CN 201510164745A CN 104821381 A CN104821381 A CN 104821381A
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- Prior art keywords
- lithium ion
- preparation
- ion battery
- solution
- aluminium
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/431—Inorganic material
-
- 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
Abstract
The invention relates to a preparation method of a lithium ion battery diaphragm, which comprises the following steps: shaping an aluminium plate having a certain thickness to an aluminium sheet in a specific shape; performing electrochemical polishing; performing primary anodization in an acid solution; removing an anodised aluminum layer in a mixing solution of H3PO4 and H2CrO4, performing secondary anodization; adding a constant voltage in the mixed liquor of H3PO4 and H2CrO4 for separating to obtain through hole anodised aluminium; performing ultrasonic cleaning on the prepared through hole anodised aluminium in order in acetone and ethanol, and drying under vacuum to obtain the lithium ion battery diaphragm. The lithium ion battery diaphragm has the advantages of low cost, easy processing equipment, high temperature thermal stability, high heat security, strong capability for adsorption of electrolyte, and high conductivity of a porous anodic alumina film for infiltrating an electrolyte. The battery has better cycle performance, multiplying power performance and high-low temperature performance, and application temperature of the battery is effectively increased.
Description
Technical field
The present invention relates to the application of anode aluminium oxide diaphragm and process for manufacturing same and its application as lithium ion battery separator, belong to field of chemical power source, particularly lithium rechargeable battery critical material and technical field.
Background technology
Battery is a kind of special electrical energy storage chemical energy being converted into efficiently electric energy, and without any gas discharging.Meanwhile, with other types for the alternative energy sources such as buffer memory solar energy, wind energy, tidal energy memory device compared with, battery uniquely effectively can advance beyond doubt at present the power of hybrid vehicle and pure electric automobile.Therefore, people propose more urgent requirement to battery in high-energy-density, high rate capability, high safety performance and low cost.
Up to the present, lithium ion battery technology complete monopoly movable power source market (as mobile phone and notebook computer), is entering power tool equipment market, and is expected to play a significant role in emerging electric automobile field in the near future.In liquid electrolyte lithium ion battery, barrier film is one of vital element, to be placed between anode and negative pole to stop physical contact between electrode, enables ion pass through smoothly and isolated electron stream simultaneously.
Current state-of-the-art lithium-ion membrane is membrane for polymer, especially polyethylene (PE) film and polypropylene (PP) film, and the cost of barrier film accounts for about 30% of battery cost.The hydrophobic performance intrinsic due to membrane for polymer and porosity low, the wettability of membrane for polymer to electrolyte is poor, hinders perforated membrane to the absorption of electrolyte and hold capacity.Therefore, the conductivity of barrier film is low, the capacity of battery and cycle performance is decayed serious.Meanwhile, membrane for polymer can shrink higher than when 100 DEG C in temperature, if battery is placed in hot environment or when high rate charge-discharge, battery will in the face of causing internal short-circuit of battery due to barrier film high-temperature shrinkage, blast even on fire.Therefore, the security performance of battery seriously constrains the development of battery in the high power power-equipments such as hybrid electric vehicle, electric motor car and robot.In order to solve membrane for polymer Problems existing, people devise various barrier film, and as nonwoven fabrics barrier film and PVDF base co-polymer barrier film, but the conductivity after these barrier films infiltration electrolyte is all very low.
Have inorganic nanoparticles as SiO in prior art
2and Al
2o
3etc. being filled in porous PVDF barrier film, to improve the conductivity of composite material, stop the thermal contraction of barrier film simultaneously.But organic existence in composite diaphragm, still destroys its stability at high temperature.Porous Al prepared by the method for high temperature sintering
2o
3film and porous SiO
2film, as lithium ion battery separator, battery table reveals good chemical property.But, Al
2o
3at thickness lower than mechanical degradation when 200 μm.
Summary of the invention
The object of the invention is to: provide that a kind of porosity is high, thickness is thin, good mechanical property, the preparation method of the lithium ion battery separator of not high to equipment requirement, with low cost, excellent performance.
In order to realize foregoing invention object, the invention provides following technical scheme:
A preparation method for lithium ion battery separator, comprises the steps:
(a), certain thickness aluminium sheet blunderbuss is become the aluminium flake of given shape;
(b), electrochemical polish is carried out to aluminium flake;
(c), the aluminium flake after polishing is carried out an anodic oxidation in acid solution;
(d), by step (c) product at H
3pO
4and H
2crO
4an anodic aluminum oxide layer is removed in mixed solution;
(e), by step (d) product two-step anodization under the condition identical with step (c);
(f), by step (e) product at CH
3cH
2oH and HClO
4add certain voltage in mixed liquor to peel off, obtain through hole anodised aluminium;
(g), through hole anodised aluminium prepared by step (f) successively in acetone and ethanol after ultrasonic cleaning, vacuumize;
H (), through hole anodic alumina films step (g) prepared are used as lithium ion battery separator.
Preferably; anneal the aluminium flake obtained after step (a) process when 500 DEG C under argon shield 5 h; then successively in acetone ultrasonic 10 min to remove surperficial grease; in 0.1 mol/L NaOH, ultrasonic 10 min remove surface oxide layer, carry out electrochemical polish after finally cleaning in deionized water.
Preferably, in step (b), the condition of aluminium flake electrochemical polish is: aluminium flake as anode, aluminium flake as the HClO of negative electrode at 0 DEG C
4: CH
3cH
2with polishing 3 min under 15-40V voltages in the solution of OH=1:4 (v/v).
Preferably, the condition of an anodic oxidation and two-step anodization be in the acid solution of the 0.3-0.8M of 0-60 DEG C, voltage is be oxidized under 21-195V condition, once the anodised time is 1-10h, and the time of two-step anodization is 5-24h.
Preferably, described acid solution is oxalic acid solution or H
2sO
4solution or H
3pO
4solution..
Preferably, described step (d) be by step (c) product at the 6%H of 80-100 DEG C
3pO
4and 1.8%H
2crO
43-10h in mixed solution, soaks to remove an anodic aluminum oxide layer.
Preferably, described step (f) is passing through step (e) product at HClO
4: CH
3cH
2through hole anodic alumina films is prepared with 45 V voltages by pulse voltage stripping in the solution of OH=1:1 (v/v).
Preferably, described step (g) is the anodic alumina films of preparation is processed in 400-600 DEG C of air 5h to remove impurity, then respectively in acetone and deionized water for ultrasonic cleaning.Finally the anodic alumina films of preparation is placed in 80-120 DEG C of more than vacuumize 12h.
Beneficial effect of the present invention is: with low cost, the easy porous anodic alumina films of process equipment are used as lithium ion battery separator by the present invention, there is high-temperature thermal stability, thermal safety is high, absorption electrolyte ability is strong, the porous anodic alumina films conductivity infiltrating electrolyte is high, make battery have better cycle performance, high rate performance and high temperature performance, and effectively can improve the Applicable temperature of battery; Meanwhile, this preparation method's technique is simple, and equipment investment is few, and the cycle is shorter, is beneficial to and reduces costs and heavy industrialization.
Accompanying drawing explanation
Fig. 1 is the scanning electron microscope (SEM) photograph of the anodic alumina films that embodiment 1 obtains, and (a), (b), (c) are respectively vertical view, profile and bottom view;
Fig. 2 is that anodic alumina films prepared by embodiment 1 infiltrates the conductivity that the conductivity of electrolyte and electrolytic conductivity and commercial polymerization thing barrier film infiltrate electrolyte and contrasts;
Fig. 3 is that after the obtained anodic alumina films of embodiment 1 and commercial polymerization thing barrier film infiltrate electrolyte, diaphragm quality is change curve in time;
The LiFePO that Fig. 4 is is barrier film with the obtained anodic alumina films of embodiment 1 and commercial polymerization thing barrier film
4the cycle performance figure of the full battery of/C;
The LiFePO that Fig. 5 is is barrier film with the obtained anodic alumina films of embodiment 1 and commercial polymerization thing barrier film
4the full battery of/C is at the discharge curve of different multiplying discharge and recharge.
Embodiment
embodiment 1
Be that the aluminium flake of 0.3 mm is cut into diameter and is 16 mm disks and has the tail of 50 × 5 mm perpendicular to disk by thickness.Compacting sample aluminium flake, then anneal sample when 500 DEG C under argon shield 5 h.By sample, ultrasonic 10 min are to remove surperficial grease in acetone, and then in 0.1 M NaOH, ultrasonic 10 min remove surface oxide layer, then clean in deionized water.Sample aluminium flake after cleaning as anode, aluminium flake as the HClO of negative electrode at 0 DEG C
4: CH
3cH
2with 15 V voltage polishing 3 min in the solution of OH=1:4 (v/v).After polishing, after being cleaned in deionized water by aluminium flake, carry out an anodic oxidation.Once anodised condition be in the 0.3 M oxalic acid solution of 0 DEG C, voltage is 40 V, oxidization time is 6 h.After an anodic oxidation, sample is put into 6% H of 80 DEG C
3pO
4with 1.8% H
2crO
46 h in mixed solution, soak to remove an anodic aluminum oxide layer.And then secondary oxidation 24 h is carried out under being oxidized identical condition with first time.In above step, dissolution homogeneity speed magnetic agitation.By at HClO
4: CH
3cH
2through hole anodic alumina films is prepared with 45 V voltages by pulse voltage stripping in the solution of OH=1:1 (v/v).The anodic alumina films of preparation is processed in 400 DEG C of air 5 h to remove impurity, then respectively in acetone and deionized water for ultrasonic cleaning.Finally the anodic alumina films of preparation is placed in 80 DEG C of vacuumize 12 more than h, the anodised aluminium pattern of preparation is as Fig. 1.
Seal with CR2032 battery case after anodic alumina films and microporous polypropylene membrane being infiltrated electrolyte in glove box, test its conductivity by electrochemical workstation, see Fig. 2.The anodic alumina films and microporous polypropylene membrane that infiltrate electrolyte are put into 55 DEG C of baking ovens, tests its quality over time, see Fig. 3.Respectively with anodic alumina films and microporous polypropylene membrane for barrier film, positive pole selects commercialization LiFePO
4, negative pole selects graphite, and being assembled into model is CR2032 test battery, tests its cycle performance and high rate performance respectively, as Fig. 4,5.
As can be seen from Figure 2: the anode aluminium oxide diaphragm and process for manufacturing same and its application infiltrating electrolyte has better lithium ion transport performance relative to membrane for polymer;
As can be seen from Figure 3: relative to membrane for polymer, anode aluminium oxide diaphragm and process for manufacturing same and its application has the retention of better electrolyte;
As can be seen from Figure 4: relative to membrane for polymer battery, anode aluminium oxide diaphragm and process for manufacturing same and its application battery has slightly good cycle performance;
As can be seen from Figure 5: relative to membrane for polymer battery, anode aluminium oxide diaphragm and process for manufacturing same and its application battery has better high rate performance.
embodiment 2
Be that the aluminium flake of 0.5 mm is cut into diameter and is 16 mm disks and has the tail of 50 × 5 mm perpendicular to disk by thickness.Compacting sample aluminium flake, then anneal sample when 500 DEG C under argon shield 5 h.By sample, ultrasonic 10 min are to remove surperficial grease in acetone, and then in 0.1 M NaOH, ultrasonic 10 min remove surface oxide layer, then clean in deionized water.Sample aluminium flake after cleaning as anode, aluminium flake as the HClO of negative electrode at 0 DEG C
4: CH
3cH
2with 15 V voltage polishing 3 min in the solution of OH=1:4 (v/v).After polishing, after being cleaned in deionized water by aluminium flake, carry out an anodic oxidation.Once anodised condition be in the 0.5 M oxalic acid solution of 0 DEG C, voltage is 60 V, oxidization time is 6 h.After an anodic oxidation, sample is put into 6% H of 80 DEG C
3pO
4with 1.8% H
2crO
46 h in mixed solution, soak to remove an anodic aluminum oxide layer.And then secondary oxidation 24 h is carried out under being oxidized identical condition with first time.In above step, dissolution homogeneity speed magnetic agitation.By at HClO
4: CH
3cH
2through hole anodic alumina films is prepared with 45 V voltages by pulse voltage stripping in the solution of OH=1:1 (v/v).The anodic alumina films of preparation is processed in 400 DEG C of air 5 h to remove impurity, then respectively in acetone and deionized water for ultrasonic cleaning.Finally the anodic alumina films of preparation is placed in 80 DEG C of vacuumize 12 more than h.Respectively with anodic alumina films and microporous polypropylene membrane for barrier film, positive pole selects Li
1.2ni
0.13co
0.13mn
0.54o
2, negative pole selects graphite, and being assembled into model is CR2032 test battery, tests its chemical property.
embodiment 3
Be that the aluminium flake of 0.6 mm is cut into diameter and is 16 mm disks and has the tail of 50 × 5 mm perpendicular to disk by thickness.Compacting sample aluminium flake, then anneal sample when 500 DEG C under argon shield 5 h.By sample, ultrasonic 10 min are to remove surperficial grease in acetone, and then in 0.1 M NaOH, ultrasonic 10 min remove surface oxide layer, then clean in deionized water.Sample aluminium flake after cleaning as anode, aluminium flake as the HClO of negative electrode at 0 DEG C
4: CH
3cH
2with 21 V voltage polishing 3 min in the solution of OH=1:4 (v/v).After polishing, after being cleaned in deionized water by aluminium flake, carry out an anodic oxidation.Once anodised condition be in the 0.3 M oxalic acid solution of 60 DEG C, voltage is 30 V, oxidization time is 1 h.After an anodic oxidation, sample is put into 6% H of 80 DEG C
3pO
4with 1.8% H
2crO
43 h in mixed solution, soak to remove an anodic aluminum oxide layer.And then secondary oxidation 5 h is carried out under being oxidized identical condition with first time.In above step, dissolution homogeneity speed magnetic agitation.By at HClO
4: CH
3cH
2through hole anodic alumina films is prepared with 45 V voltages by pulse voltage stripping in the solution of OH=1:1 (v/v).The anodic alumina films of preparation is processed in 500 DEG C of air 5 h to remove impurity, then respectively in acetone and deionized water for ultrasonic cleaning.Finally the anodic alumina films of preparation is placed in 120 DEG C of vacuumize 12 more than h.Respectively with anodic alumina films and microporous polypropylene membrane for barrier film, positive pole selects LiMn
2o
4, negative pole selects graphite, and being assembled into model is CR2032 test battery, tests its chemical property.
embodiment 4
Be that the aluminium flake of 0.3 mm is cut into diameter and is 16 mm disks and has the tail of 50 × 5 mm perpendicular to disk by thickness.Compacting sample aluminium flake, then anneal sample when 500 DEG C under argon shield 5 h.By sample, ultrasonic 10 min are to remove surperficial grease in acetone, and then in 0.1 M NaOH, ultrasonic 10 min remove surface oxide layer, then clean in deionized water.Sample aluminium flake after cleaning as anode, aluminium flake as the HClO of negative electrode at 0 DEG C
4: CH
3cH
2with 30 V voltage polishing 3 min in the solution of OH=1:4 (v/v).After polishing, after being cleaned in deionized water by aluminium flake, carry out an anodic oxidation.Once anodised condition is the 0.8 M H at 60 DEG C
2sO
4in solution, voltage is 21 V, oxidization time is 10 h.After an anodic oxidation, sample is put into 6% H of 80 DEG C
3pO
4with 1.8% H
2crO
410 h in mixed solution, soak to remove an anodic aluminum oxide layer.And then secondary oxidation 20 h is carried out under being oxidized identical condition with first time.In above step, dissolution homogeneity speed magnetic agitation.By at HClO
4: CH
3cH
2through hole anodic alumina films is prepared with 45 V voltages by pulse voltage stripping in the solution of OH=1:1 (v/v).The anodic alumina films of preparation is processed in 600 DEG C of air 5 h to remove impurity, then respectively in acetone and deionized water for ultrasonic cleaning.Finally the anodic alumina films of preparation is placed in 120 DEG C of vacuumize 12 more than h.Respectively with anodic alumina films and microporous polypropylene membrane for barrier film, positive pole selects LiNi
1/3co
1/3mn
1/3o
2, negative pole selects Li
4ti
5o
12, being assembled into model is CR2032 test battery, tests its chemical property.
embodiment 5
Be that the aluminium flake of 0.8 mm is cut into diameter and is 16 mm disks and has the tail of 50 × 5 mm perpendicular to disk by thickness.Compacting sample aluminium flake, then anneal sample when 500 DEG C under argon shield 5 h.By sample, ultrasonic 10 min are to remove surperficial grease in acetone, and then in 0.1 M NaOH, ultrasonic 10 min remove surface oxide layer, then clean in deionized water.Sample aluminium flake after cleaning as anode, aluminium flake as the HClO of negative electrode at 0 DEG C
4: CH
3cH
2with 40 V voltage polishing 3 min in the solution of OH=1:4 (v/v).After polishing, after being cleaned in deionized water by aluminium flake, carry out an anodic oxidation.Once anodised condition is the 0.4 M H at 60 DEG C
3pO
4in solution, voltage is 195 V, oxidization time is 10 h.After an anodic oxidation, sample is put into 6% H of 100 DEG C
3pO
4with 1.8% H
2crO
410 h in mixed solution, soak to remove an anodic aluminum oxide layer.And then secondary oxidation 20 h is carried out under being oxidized identical condition with first time.In above step, dissolution homogeneity speed magnetic agitation.By at HClO
4: CH
3cH
2through hole anodic alumina films is prepared with 45 V voltages by pulse voltage stripping in the solution of OH=1:1 (v/v).The anodic alumina films of preparation is processed in 600 DEG C of air 5 h to remove impurity, then respectively in acetone and deionized water for ultrasonic cleaning.Finally the anodic alumina films of preparation is placed in 120 DEG C of vacuumize 12 more than h.Respectively with anodic alumina films and microporous polypropylene membrane for barrier film, positive pole selects LiNi
1/3co
1/3mn
1/3o
2, negative pole selects Li
4ti
5o
12, being assembled into model is CR2032 test battery, tests its chemical property.
in above embodiment, electro-chemical test carries out in following condition:
Positive electrode and negative material, all with Super P for conductive agent, PVdF(Kynoar) make binding agent, NMP is that solvent furnishing slip is applied to respectively on aluminium foil and Copper Foil and is made pole piece, and electrolyte is 1mol/L LiPF
6/ EC+DEC (1:1); The barrier film that the anodic alumina films prepared with the present invention respectively and microporous polypropylene membrane are battery, being assembled into model is CR2032 test battery.In the glove box being full of argon gas, be assembled into button electricity, carry out electro-chemical test.
Claims (8)
1. a preparation method for lithium ion battery separator, is characterized in that, comprises the steps:
(a), certain thickness aluminium sheet blunderbuss is become the aluminium flake of given shape;
(b), electrochemical polish is carried out to aluminium flake;
(c), the aluminium flake after polishing is carried out an anodic oxidation in acid solution;
(d), by step (c) product at H
3pO
4and H
2crO
4an anodic aluminum oxide layer is removed in mixed solution;
(e), by step (d) product two-step anodization under the condition identical with step (c);
(f), by step (e) product at CH
3cH
2oH and HClO
4add certain voltage in mixed liquor to peel off, obtain through hole anodised aluminium;
(g), through hole anodised aluminium prepared by step (f) successively in acetone and ethanol after ultrasonic cleaning, vacuumize;
H (), through hole anodic alumina films step (g) prepared are used as lithium ion battery separator.
2. the preparation method of lithium ion battery separator according to claim 1; it is characterized in that; anneal the aluminium flake obtained after step (a) process when 500 DEG C under argon shield 5 h; then successively in acetone ultrasonic 10 min to remove surperficial grease; in the NaOH solution of 0.1 mol/L, ultrasonic 10 min remove surface oxide layer, carry out electrochemical polish after finally cleaning in deionized water.
3. the preparation method of lithium ion battery separator according to claim 1, is characterized in that, in step (b), the condition of aluminium flake electrochemical polish is: aluminium flake is HClO as negative electrode the volume ratio of 0 DEG C as anode, aluminium flake
4: CH
3cH
2with polishing 3 min under 15-40V voltage in the solution of OH=1:4.
4. the preparation method of lithium ion battery separator according to claim 1, it is characterized in that, the condition of an anodic oxidation and two-step anodization be in the acid solution of the 0.3-0.8mol/L of 0-60 DEG C, voltage is be oxidized under 21-195V condition, once the anodised time is 1-10h, and the time of two-step anodization is 5-24h.
5. the preparation method of lithium ion battery separator according to claim 3, is characterized in that, described acid solution is oxalic acid solution or H
2sO
4solution or H
3pO
4solution.
6. the preparation method of lithium ion battery separator according to claim 1, is characterized in that, described step (d) be by step (c) product at the 6%H of 80-100 DEG C
3pO
4and 1.8%H
2crO
43-10h in mixed solution, soaks to remove an anodic aluminum oxide layer.
7. the preparation method of lithium ion battery separator according to claim 1, is characterized in that, described step (f) for by step (e) product by being HClO in volume ratio
4: CH
3cH
2through hole anodic alumina films is prepared with 45V voltage by pulse voltage stripping in the solution of OH=1:1.
8. the preparation method of lithium ion battery separator according to claim 1, it is characterized in that, described step (g) is the anodic alumina films of preparation is processed in 400-600 DEG C of air 5h to remove impurity, then respectively in acetone and deionized water for ultrasonic cleaning; Finally the anodic alumina films of preparation is placed in 80-120 DEG C of more than vacuumize 12h.
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|---|---|---|---|
| CN201510164745.6A CN104821381A (en) | 2015-04-08 | 2015-04-08 | Preparation method of lithium ion battery diaphragm |
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|---|---|---|---|
| CN201510164745.6A CN104821381A (en) | 2015-04-08 | 2015-04-08 | Preparation method of lithium ion battery diaphragm |
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ID=53731616
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| CN201510164745.6A Pending CN104821381A (en) | 2015-04-08 | 2015-04-08 | Preparation method of lithium ion battery diaphragm |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448107A (en) * | 2018-04-09 | 2018-08-24 | 徐冬 | A kind of preparation method of high power capacity sodium-ion battery positive material |
| CN109148795A (en) * | 2018-09-08 | 2019-01-04 | 佛山皖和新能源科技有限公司 | A kind of preparation method of battery composite diaphragm |
| CN110993864A (en) * | 2019-11-21 | 2020-04-10 | 四川新敏雅电池科技有限公司 | Battery separator, method for manufacturing same, and lithium ion battery |
| CN111613447A (en) * | 2020-05-22 | 2020-09-01 | 东莞东阳光科研发有限公司 | Laminated electrolytic capacitor and method for manufacturing the same |
| CN115863924A (en) * | 2023-02-24 | 2023-03-28 | 东营昆宇电源科技有限公司 | COFs modified AAO membrane, preparation method thereof and sodium-ion battery |
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| CN102776542A (en) * | 2012-07-25 | 2012-11-14 | 华南理工大学 | Preparation method of anodized aluminum film of through hole |
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| CN102776542A (en) * | 2012-07-25 | 2012-11-14 | 华南理工大学 | Preparation method of anodized aluminum film of through hole |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448107A (en) * | 2018-04-09 | 2018-08-24 | 徐冬 | A kind of preparation method of high power capacity sodium-ion battery positive material |
| CN109148795A (en) * | 2018-09-08 | 2019-01-04 | 佛山皖和新能源科技有限公司 | A kind of preparation method of battery composite diaphragm |
| CN110993864A (en) * | 2019-11-21 | 2020-04-10 | 四川新敏雅电池科技有限公司 | Battery separator, method for manufacturing same, and lithium ion battery |
| CN111613447A (en) * | 2020-05-22 | 2020-09-01 | 东莞东阳光科研发有限公司 | Laminated electrolytic capacitor and method for manufacturing the same |
| CN115863924A (en) * | 2023-02-24 | 2023-03-28 | 东营昆宇电源科技有限公司 | COFs modified AAO membrane, preparation method thereof and sodium-ion battery |
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