CN116805668A - Battery self-supporting anode and preparation method and application thereof - Google Patents
Battery self-supporting anode and preparation method and application thereof Download PDFInfo
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- CN116805668A CN116805668A CN202310808314.3A CN202310808314A CN116805668A CN 116805668 A CN116805668 A CN 116805668A CN 202310808314 A CN202310808314 A CN 202310808314A CN 116805668 A CN116805668 A CN 116805668A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000006260 foam Substances 0.000 claims abstract description 23
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 21
- 229910020599 Co 3 O 4 Inorganic materials 0.000 claims abstract description 12
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 10
- 238000011068 loading method Methods 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 239000000758 substrate Substances 0.000 claims abstract description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 20
- 235000012431 wafers Nutrition 0.000 claims description 13
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000003760 magnetic stirring Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000009472 formulation Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052744 lithium Inorganic materials 0.000 abstract description 11
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 238000003860 storage Methods 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 3
- 238000009841 combustion method Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 6
- 230000001351 cycling effect Effects 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 229910017052 cobalt Inorganic materials 0.000 description 3
- 239000010941 cobalt Substances 0.000 description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 3
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 description 3
- 229910001981 cobalt nitrate Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 239000010405 anode material Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001414 potassium ion Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910013872 LiPF Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 101150058243 Lipf gene Proteins 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
Classifications
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- 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
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
-
- 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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a self-supporting anode of a battery, a preparation method and application thereof, and relates to the technical field of lithium ion batteries. The self-supporting anode of the battery takes foam nickel as a supporting substrate, realizes low energy consumption and rapid construction of self-supporting NF through a solution combustion method, is directly used as the anode of the lithium ion battery, and takes Co as the surface 3 O 4 As a coating, the Co 3 O 4 The surface loading of the coating is 0.4-1.1mg/cm 2 The prepared electrode has excellent lithium storage performance, wherein after 110 cycles, the discharge specific capacity of NF-1 is up to 881mAh/g, and is about 93.5% of 942mAh/g of the specific capacity of 2 nd discharge; NF-2 has a specific discharge capacity of 701mAh/g, which is about 87.2% of the specific discharge capacity of 804mAh/g at the 2 nd time. In addition, the invention proves that the self-supporting anode of the lithium ion battery can be constructed by adopting the ultrafast and low-energy consumption combustion solution processAnd a new idea is provided for industry development.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a self-supporting anode of a battery, and a preparation method and application thereof.
Background
The availability of commercial graphite anodes near theoretical limits and the weaker rate capability prevent their further use in high power applications. As a potential anode material, both the intrinsically weak electronic conductivity of the transition metal oxide and the pulverization caused by the large volume change during delithiation lead to poor electrochemical performance of the battery. The preparation of self-supporting electrodes is one of the effective strategies to overcome the above-mentioned problems.
The self-supporting electrode can directly combine (grow/deposit) the active material on the surface of a conductive substrate (such as carbon cloth, graphene aerogel, foam nickel, foam copper and the like), so that the overall conductivity of the electrode is increased; meanwhile, the active material can increase the contact area with the electrolyte, provide more channels for lithium ions to deintercalate lithium, and buffer the volume change in the deintercalate lithium process. Researchers have developed various processes such as hydrothermal, electrodeposition, electrothermal, physical/chemical vapor deposition, solvothermal, etc. to grow/deposit anode materials on conductive substrates, and have prepared and obtained self-supporting anodes with excellent properties. However, this preparation process is energy-intensive, complex and time-consuming. Therefore, development of a novel low-energy-consumption and high-efficiency self-supporting anode preparation process still has important research significance.
Disclosure of Invention
(one) solving the technical problems
The invention provides a self-supporting anode of a battery, and provides a preparation method and application thereof, wherein the self-supporting anode of the battery has higher specific area capacity and better cycling stability, and the preparation process is simple and efficient, so that the problems of high energy consumption, complex process, time consumption and the like in the prior art are solved.
(II) technical scheme
The first object of the invention is to provide a self-supporting anode of a battery, which takes foam nickel as a supporting substrate and Co as the surface 3 O 4 And (3) coating.
Preferably, the Co 3 O 4 The surface loading of the coating is 0.4-1.1mg/cm 2 。
Preferably, the Co 3 O 4 The surface loading of the coating is 0.4, 0.76 or 1.1mg/cm 2 。
A second object of the present invention is to provide a method for preparing a self-supporting anode for a battery, comprising the steps of:
(1) Cutting the foam nickel into foam nickel wafers;
(2) Washing the obtained foam nickel wafer in acetone, dilute hydrochloric acid and alcohol in sequence, and keeping the foam nickel wafer in alcohol for standby;
(3) Co (NO) formulation by magnetic stirring 3 ) 2 ·6H 2 Ethanol solution of O;
(4) Immersing the foam nickel wafer into the solution in the step (3) and carrying out ultrasonic treatment, taking out, directly igniting on an alcohol lamp, and automatically extinguishing to obtain the self-supporting anode of the battery which is dip-coated for 1 time, and recording as NF-1.
Preferably, the method further comprises the step (5): immersing NF-1 in the solution (3) in the solution (4) for 30 seconds, taking out, igniting on an alcohol lamp, and automatically extinguishing to obtain the self-supporting anode of the battery which is dip-coated for 2 times, and recording as NF-2.
Preferably, the method further comprises the step (6): immersing NF-2 in the solution (3) in the solution (5) for 30 seconds, taking out, igniting on an alcohol lamp, and automatically extinguishing to obtain the self-supporting anode of the battery which is dip-coated for 3 times, and recording as NF-3.
Preferably, the diameter of the foam nickel wafer in the step (1) is 12mm, and the concentration of the dilute hydrochloric acid in the step (2) is 0.3mol/L.
Preferably, co (NO 3 ) 2 ·6H 2 The concentration of O is 10-50mg/mL.
Preferably, the cleaning time in the step (2) is 5min, and the ultrasonic time in the step (4) is 1min.
A third object of the present invention is to provide a lithium ion battery employing the above battery self-supporting anode or the battery self-supporting anode prepared by the above method.
(III) beneficial effects
The invention provides a self-supporting anode of a battery, a preparation method and application thereof. The method has the specific beneficial effects that:
(1) Rapid and low-energy-consumption construction of self-supporting electrodes with different loading amounts
Fast-it can be seen from the experimental method that the total time of the whole experimental process of one calcination is not more than 30 minutes;
low energy consumption-the method only needs to be ignited on an alcohol lamp, and then the solution burns spontaneously and the final product is obtained;
load control—active Co can be controlled by controlling the number of submergions and ignites 3 O 4 Is used in the range of (NF-1 is 0.4 mg/cm) 2 NF-2 was 0.76mg/cm 2 NF-3 was 1.1mg/cm 2 )。
(2) Self-supporting electrode with excellent lithium storage performance
The NF-1, NF-2 and NF-3, which are directly used as negative (positive) electrodes of lithium ion batteries, all show higher lithium storage capacity and cycle stability at the current density of 0.5A/g: after 110 cycles, NF-1 has a specific discharge capacity up to 881mAh/g, which is about 93.5% of 942mAh/g of the specific discharge capacity of the 2 nd cycle; after 110 cycles, the specific discharge capacity of NF-2 is 701mAh/g, which is about 87.2% of the specific discharge capacity of 804mAh/g for the 2 nd time; after 110 cycles, the NF-3 specific capacity was 574mAh/g, which was about 71% of the second specific capacity 807.
Drawings
Fig. 1: XRD patterns of NF-1, NF-2, NF-3;
fig. 2: SEM images of (a, b) NF-1, (c) NF-2, and (d) NF-3;
fig. 3: cycling performance graphs of NF-1, NF-2, NF-3 electrodes.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
self-supporting Co production by improved solution combustion 3 O 4 An @ NF electrode. The method comprises the following steps:
(1) Cutting the nickel foam into wafers with the diameter of 12.0mm, and selecting commercial nickel foam which is common in the market;
(2) Washing the obtained foam nickel wafer in acetone, dilute hydrochloric acid (0.3 mol/L) and alcohol for 5min, and keeping in alcohol for later use;
(3) Preparation of cobalt nitrate by magnetic stirring (Co (NO) 3 ) 2 ·6H 2 O) ethanol solution with the concentration of 10-50mg/L (also called cobalt-based precursor liquid);
(4) Immersing the foam nickel wafer into the solution in the step (3) and carrying out ultrasonic treatment for 1min, taking out, directly igniting on an alcohol lamp, and automatically extinguishing to obtain a self-supporting anode of the battery which is dip-coated for 1 time, and recording as NF-1
(Co 3 O 4 @NF-1)。
Co of the self-supporting anode of the prepared battery 3 O 4 The surface loading is 0.4mg/cm 2 。
In a preferred embodiment, the concentration of the cobalt-based precursor solution is 30mg/L.
Example 2:
the difference from example 1 is that a secondary immersion of the solution in (3) was also required for 30 seconds, and the solution was taken out, ignited on an alcohol lamp and automatically extinguished to obtain a self-supporting anode of the battery dip-coated 2 times, designated NF-2 (Co 3 O 4 @NF-2)。
Co of the self-supporting anode of the prepared battery 3 O 4 The surface loading was about 0.76mg/cm 2 。
Example 3:
the difference from example 2 is that the solution of (3) was further immersed for 30 seconds, and the solution was taken out, ignited on an alcohol lamp and automatically extinguished to obtain a self-supporting anode of the battery dip-coated 3 times, which was designated NF-3 (Co 3 O 4 @NF-3)。
Co of the self-supporting anode of the prepared battery 3 O 4 The surface loading was about 1.1mg/cm 2 。
Co of self-supporting anode of battery prepared by three-time combustion 3 O 4 The surface loading is basically kept between 0.4 and 1.1mg/cm 2 Within the range.
Example 4:
co is to be 3 O 4 The @ NF (including NF-1, NF-2, and NF-3) is used directly as the anode of a lithium battery.
In a preferred embodiment, the CR2016 button half-cell is assembled with Celgard 2340 membrane and lithium foil in an Ar atmosphere MBRAUN LABStar glove box with 1M LiPF as electrolyte 6 Is described (LB-008).
Example 5:
electrode performance tests were performed using the electrodes prepared in examples 1-3:
co is to be 3 O 4 The @ NF is directly used as an anode, and is assembled with a Celgard 2340 diaphragm and a lithium foil in an Ar atmosphere MBRAUN LABStar glove box to form a CR2016 button half-cell, and the electrolyte is 1M LiPF 6 Is described (LB-008). After standing for 6 hours, the battery is subjected to constant current charge and discharge test in a 0.01-3V interval on a LAND CT2001A test system.
The results show that:
after ultrasonic treatment, the cobalt-based precursor liquid is fully contacted with NF (nickel foam); the heat released by the ethanol combustion breaks down the cobalt nitrate into Co deposited on the NF skeleton 3 O 4 The method comprises the steps of carrying out a first treatment on the surface of the At the same time, the high-temperature gas is released in Co 3 O 4 The layer leaves a large number of holes. Referring to FIG. 1, the XRD patterns of NF-1, NF-2 and NF-3 are shown in FIG. 1. NF-1, NF-2 and NF-3 all exhibited new characteristic peaks. Characteristic peaks at 2θ=31.2, 36.8, 59.4 and 65.2°, which correspond to Co, respectively 3 O 4 (220), (311), (511) and (440) crystal planes (JCPLDS: no. 42-1467); no NiO characteristic peaks appear. The above results indicate that cobalt nitrate is decomposed into Co 3 O 4 And the Ni substrate is not oxidized.
Referring to FIG. 2, an SEM of NF-1, NF-2, and NF-3 is shown in FIG. 2. NF-1 frameworks appear to be rough; FIG. 2b shows, when enlarged, that the foam nickel skeleton has continuous Co 3 O 4 Particles, the particles further grown as spheres having a diameter of about 500 nm; from the slaveFIG. 2c shows that after the secondary dip coating and calcination, the shell layer becomes smooth and particles around 500nm do not continue to grow; as can be seen in fig. 2d, more nano-particles are covered onto the scaffold. The porous coating can provide a large contact area with electrolyte, which is beneficial to Li in the charge and discharge process + Is not limited by the dynamics of the deintercalation of the polymer.
Referring to FIG. 3, FIG. 3 is a graph showing the charge and discharge performance of NF-1, NF-2, and NF-3 electrodes at a current density of 0.5A/g. It can be seen that NF-1, NF-2 electrodes have higher specific mass capacities and excellent cycling stability than NF-3. After 110 times of charge and discharge, the mass specific capacities of the three electrodes are 881, 701 and 574mAh/g respectively.
Please refer to table 1, and other Co 3 O 4 The advantages of this application over the base electrode are mainly represented by the efficient preparation of the self-supporting electrode and its cycling stability of the electrode.
TABLE 1
The invention adopts a low energy consumption and rapid solution combustion method to successfully construct the self-supporting Co 3 O 4 The @ NF-based electrode was used directly as the anode for a lithium ion battery. The NF-1, NF-2 and NF-3 electrodes prepared all exhibit excellent lithium storage properties thanks to the self-supporting structure of the electrode. The results show that the self-supporting anode of the lithium ion battery is constructed by adopting an ultrafast and low-energy-consumption combustion solution process, and a new thought is provided for industry development. The invention can also provide a reference for the preparation of the self-supporting Ni/Fe/Cu/Mn-based anode of the lithium/sodium/potassium ion battery. The method of the invention is adopted for conventional replacement, and the prepared lithium/sodium/potassium ion battery and the like also belong to the protection scope of the invention.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The self-supporting anode of the battery is characterized in that: the self-supporting anode of the battery takes foam nickel as a supporting substrate, and the surface of the self-supporting anode is Co 3 O 4 And (3) coating.
2. The battery self-supporting anode of claim 1, wherein: the Co is 3 O 4 The surface loading of the coating is 0.4-1.1mg/cm 2 。
3. The battery self-supporting anode of claim 2, wherein: the Co is 3 O 4 The surface loading of the coating was 0.76mg/cm 2 。
4. The preparation method of the self-supporting anode of the battery is characterized by comprising the following steps:
(1) Cutting the foam nickel into foam nickel wafers;
(2) Washing the obtained foam nickel wafer in acetone, dilute hydrochloric acid and alcohol in sequence, and keeping the foam nickel wafer in alcohol for standby;
(3) Co (NO) formulation by magnetic stirring 3 ) 2 ·6H 2 Ethanol solution of O;
(4) Immersing the foam nickel wafer into the solution in the step (3) and carrying out ultrasonic treatment, taking out, directly igniting on an alcohol lamp, and automatically extinguishing to obtain the self-supporting anode of the battery which is dip-coated for 1 time, and recording as NF-1.
5. The method for preparing a self-supporting anode for a battery according to claim 4, wherein:
further comprising the step (5): immersing NF-1 in the solution (3) in the solution (4) for 30 seconds, taking out, igniting on an alcohol lamp, and automatically extinguishing to obtain the self-supporting anode of the battery which is dip-coated for 2 times, and recording as NF-2.
6. The method for preparing a self-supporting anode for a battery according to claim 5, wherein:
further comprising the step (6): immersing NF-2 in the solution (3) in the solution (5) for 30 seconds, taking out, igniting on an alcohol lamp, and automatically extinguishing to obtain the self-supporting anode of the battery which is dip-coated for 3 times, and recording as NF-3.
7. The method for preparing a self-supporting anode for a battery according to claim 4, wherein:
the diameter of the foam nickel wafer in the step (1) is 12mm, and the concentration of the dilute hydrochloric acid in the step (2) is 0.3mol/L.
8. The method for preparing a self-supporting anode for a battery according to claim 4, wherein:
co (NO) in the step (3) 3 ) 2 ·6H 2 The concentration of O is 10-50mg/mL.
9. The method for preparing a self-supporting anode for a battery according to claim 4, wherein:
the cleaning time in the step (2) is 5min, and the ultrasonic time in the step (4) is 1min.
10. A lithium ion battery, characterized by comprising the battery self-supporting anode according to any one of claims 1-3 or the battery self-supporting anode prepared by the preparation method according to any one of claims 4-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310808314.3A CN116805668A (en) | 2023-07-04 | 2023-07-04 | Battery self-supporting anode and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310808314.3A CN116805668A (en) | 2023-07-04 | 2023-07-04 | Battery self-supporting anode and preparation method and application thereof |
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| CN116805668A true CN116805668A (en) | 2023-09-26 |
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