CN113555560A - Method for improving commercial graphite capacity and rate capability and lithium ion battery - Google Patents
Method for improving commercial graphite capacity and rate capability and lithium ion battery Download PDFInfo
- Publication number
- CN113555560A CN113555560A CN202010325071.4A CN202010325071A CN113555560A CN 113555560 A CN113555560 A CN 113555560A CN 202010325071 A CN202010325071 A CN 202010325071A CN 113555560 A CN113555560 A CN 113555560A
- Authority
- CN
- China
- Prior art keywords
- copper foil
- graphite
- copper
- solution
- capacity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 49
- 239000010439 graphite Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 15
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims description 14
- 229910001416 lithium ion Inorganic materials 0.000 title claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 82
- 239000011889 copper foil Substances 0.000 claims abstract description 73
- 150000001879 copper Chemical class 0.000 claims abstract description 34
- 239000000243 solution Substances 0.000 claims abstract description 31
- 239000002245 particle Substances 0.000 claims abstract description 22
- 239000012153 distilled water Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000012266 salt solution Substances 0.000 claims abstract description 9
- 238000002791 soaking Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 239000007773 negative electrode material Substances 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 6
- QTMDXZNDVAMKGV-UHFFFAOYSA-L copper(II) bromide Substances [Cu+2].[Br-].[Br-] QTMDXZNDVAMKGV-UHFFFAOYSA-L 0.000 claims description 5
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical group Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims description 5
- 229910021589 Copper(I) bromide Inorganic materials 0.000 claims description 4
- 229910021591 Copper(I) chloride Inorganic materials 0.000 claims description 4
- 229910021590 Copper(II) bromide Inorganic materials 0.000 claims description 4
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 3
- 229910021592 Copper(II) chloride Inorganic materials 0.000 claims description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 3
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 239000006230 acetylene black Substances 0.000 claims description 3
- 229910000366 copper(II) sulfate Inorganic materials 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 229940045803 cuprous chloride Drugs 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 239000007770 graphite material Substances 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 239000004570 mortar (masonry) Substances 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 229910001290 LiPF6 Inorganic materials 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 3
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 6
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 5
- 230000001351 cycling effect Effects 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- ODWXUNBKCRECNW-UHFFFAOYSA-M bromocopper(1+) Chemical compound Br[Cu+] ODWXUNBKCRECNW-UHFFFAOYSA-M 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 229910000365 copper sulfate Inorganic materials 0.000 description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229960003280 cupric chloride Drugs 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
Images
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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
-
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a method for improving the capacity and rate capability of commercial graphite, which comprises the following steps: preparing 100mL of copper salt solution with a certain concentration, then placing the copper foil in the solution for soaking for a period of time, then taking out the copper foil, cleaning the copper foil with distilled water, and then naturally drying the copper foil in the air. Thus obtaining the copper foil with a layer of copper salt particles. At 1A g‑1Under the current density, after circulating for 100 circles, the capacity of the graphite on the traditional copper foil is only 34mAh g‑1The treated copper foil was used, and the capacity of graphite was 128mAh g‑1. The method can be realized on the basis of not changing the existing lithium battery production process, has simple process and low cost, is suitable for large-scale production, and is expected to be applied to mass productionThe lithium battery industry is rapidly applied and has great commercial value.
Description
Technical Field
The invention relates to a method for improving the capacity and rate capability of commercial graphite and a lithium ion battery, and belongs to the technical field of energy materials.
Background
The lithium ion battery has the advantages of stable working voltage, good safety performance, rapid charging, high mass specific energy and volume specific energy and the like, and is widely applied to electronic equipment such as mobile phones, notebook computers, digital cameras and the like. The lithium ion battery mainly comprises a positive electrode material, a negative electrode material, a current collector, a diaphragm, electrolyte and the like. At present, the negative electrode material of the commercial lithium ion battery is mainly graphite, the graphite has good cycling stability but low theoretical capacity, and only has 372mAh g-1. Other carbon materials are expensive and limited to laboratory studies, and thus are difficult to commercialize in a real sense. Therefore, under the premise that the existing production process is not changed, the capacity of the graphite is improved, and important theoretical and practical significance is achieved.
There are generally two methods of increasing the graphite capacity: firstly, adding transition metal oxide into graphite to improve the capacity of the graphite; secondly, the addition of metal particles or other morphologies of carbon material to the graphite increases the capacity of the graphite by increasing the conductivity. It is known that graphite is adhered to the surface of copper foil in actual lithium batteries and used as a negative electrode. The copper foil is called a current collector, and the current generated by the active material is collected and transmitted. The literature research shows that no research report of generating copper salt particles on the surface of commercial copper foil to improve the graphite capacity is found. The whole process of the invention is safe and controllable, simple and easy to implement, and low in process cost, and is very suitable for large-scale production and application.
Disclosure of Invention
The invention discloses a method for improving the capacity and rate capability of commercial graphite. Experiments prove that the capacity and the rate capability of the graphite can be obviously improved by growing a layer of copper salt particles on the surface of the copper foil by a soaking method.
A lithium ion battery is assembled by using copper foil as a negative current collector and using a graphite material as a main negative active material; it is characterized in that: the copper foil is a copper foil to which a layer of copper salt particles is attached.
Preferably: the copper foil having a layer of copper salt particles attached thereto is prepared by immersing a copper foil in 100mL
0.1-0.8 mol/L copper salt solution, soaking for 10-40 min, washing with distilled water,
naturally drying the mixture to obtain the finished product.
Preferably: the copper salt solution is CuCl2Solution, CuBr2Solution, Cu (NO)3)2Solution, CuSO4One of the solutions.
Preferably: the copper salt is copper chloride, and the substance generated on the surface of the copper foil is cuprous chloride.
Preferably: 100mL of 0.2mol/L CuBr is prepared2And (3) solution, then, placing the copper foil in the solution for soaking for 20min, washing by using distilled water, and naturally drying by air. Thus obtaining the modified copper foil.
The invention provides a method for improving the capacity and rate capability of commercial graphite, which comprises the following steps:
(1) preparation of the Material
A copper salt; commercially available copper foil
(2) Preparation of samples
Preparing 100mL of 0.1-0.8 mol/L copper salt solution, then placing the copper foil in the solution for soaking for 10-40 min, cleaning with distilled water, and naturally drying. Thus obtaining the modified copper foil. The copper foil is used as a negative current collector, graphite is used as a negative active material to assemble a half cell, and conventional charge and discharge tests are carried out. At 1A g-1Under the current density, when the copper foil attached with a layer of copper salt particles is used, the first discharge capacity of the graphite is 140-170 mAh g-1After the circulation is carried out for 100 days, the capacity of the graphite is still maintained to be 110-130 mAh g-1。
In the method of the invention, the copper salt solution is CuCl2Solution (cupric chloride), CuBr2Solution (cupric bromide), Cu (NO)3)2Solution (copper nitrate), CuSO4One of the solutions (copper sulfate).
The beneficial effects are as follows: a layer of copper salt particles grows on the surface of copper foil through a soaking method, and then the copper foil attached with the copper salt particles is used as a negative current collector to assemble the lithium ion battery, so that the capacity and the rate capability of the lithium ion battery are greatly improved. In 1Ag-1Under the current density, after circulating for 100 circles, the capacity of the graphite on the traditional copper foil is only 34mAh g-1The treated copper foil was used, and the capacity of graphite was 128mAh g-1。
Drawings
FIG. 1 shows a half cell assembled from a prepared copper foil a and an original copper foil o in 1Ag-1First charge and discharge curves at current density.
FIG. 2 shows a half cell assembled from a prepared copper foil a and an original copper foil o in 1Ag-1Discharge specific capacity cycling plot at current density.
Fig. 3 is an XRD pattern of the surface material of the prepared copper foil a and the virgin copper foil o.
Detailed Description
Example 1
100mL of 0.2mol/L Cu (NO) was prepared3)2And (3) putting the copper foil into the solution (cupric nitrate), soaking for 30min, washing with distilled water, and naturally drying to obtain the copper foil attached with a layer of copper salt particles.
Weighing graphite, acetylene black and polyvinylidene fluoride according to the mass ratio of 8:1:1, grinding the materials in an agate mortar to uniformly mix the three materials, dropwise adding a proper amount of N-methyl pyrrolidone to prepare paste, uniformly pressing and smearing a glass sheet on the copper foil attached with a layer of copper salt particles, then putting the copper foil coated with the graphite in a vacuum drying box, and carrying out vacuum drying. After natural cooling, graphite and lithium sheets are respectively used as two electrodes, Celgard2400 is used as a diaphragm, and the diaphragm contains 1mol/LLIPF6The organic solution of (a) was used as an electrolyte and assembled into a half cell in a glove box (ZKX model, south kyo instruments and factories) filled with high-purity nitrogen gas. After which a conventional charge and discharge test was performed.
FIG. 1 shows a half cell in 1Ag using a prepared copper foil a and an original copper foil o-1First charge and discharge curves at current density. It can be seen that the original copper is usedThe first discharge specific capacity of the foil battery is only 27mAh g-1When the copper foil attached with a layer of copper salt particles is used, the first discharge specific capacity reaches 158mAh g-1The improvement is 5.8 times.
FIG. 2 shows a half cell in 1Ag using a prepared copper foil a and an original copper foil o-1Discharge specific capacity cycling plot at current density. When the original copper foil o is used, the graphite capacity is 35mAh g after 100 cycles of circulation-1. When the copper foil a with a layer of copper salt particles is used, the capacity of the graphite is still maintained at 128mAh g after 100 cycles-1Is improved by 3.6 times
Fig. 3 is an XRD pattern of the surface material of the copper foil a to which a layer of copper salt particles is attached and the virgin copper foil o. As can be seen from the figure, the substance attached to the surface of the copper foil is CuCl.
Example 2
100mL of 0.2mol/L CuBr is prepared2Solution (copper bromide), then, the copper foil was immersed in the solution for 20min, washed with distilled water, and then air-dried. Thus obtaining the modified copper foil. The copper foil is used as a negative current collector, graphite is used as a negative active material to assemble a half cell, and conventional charge and discharge tests are carried out. The assembly and testing was the same as example 1. The results show that at 1A g-1When a copper foil having a copper salt particle adhered thereto was used at a current density, the first discharge capacity of graphite was 150mAh g-1After 100 cycles, the capacity of the graphite is still maintained at 122mAh g-1。
Example 3
100mL of 0.5mol/L CuCl is prepared2Solution (copper chloride), then, the copper foil was immersed in the solution for 10min, washed with distilled water, and naturally air-dried. Thus obtaining the modified copper foil. The copper foil is used as a negative current collector, graphite is used as a negative active material to assemble a half cell, and conventional charge and discharge tests are carried out. The assembly and testing was the same as example 1. The results show that at 1A g-1The first discharge capacity of graphite was 155mAh g at current density using a copper foil to which a layer of copper salt particles was attached-1After 100 cycles, the capacity of the graphite is still maintained at 127mAh g-1。
Example 4
100mL of 0.4mol/L CuBr is prepared2Solution (copper bromide), then, the copper foil was immersed in the solution for 15min, washed with distilled water, and then air-dried. Thus obtaining the modified copper foil. The copper foil is used as a negative current collector, graphite is used as a negative active material to assemble a half cell, and conventional charge and discharge tests are carried out. The assembly and testing was the same as example 1. The results show that at 1A g-1The first discharge capacity of graphite was 152mAh g at current density using a copper foil with a layer of copper salt particles attached-1After 100 cycles, the capacity of the graphite is still maintained at 120mAh g-1。
Example 5
100mL of 0.8mol/L CuSO is prepared4Solution (copper sulfate), then, the copper foil was immersed in the solution for 10min, washed with distilled water, and naturally air-dried. Thus obtaining the modified copper foil. The copper foil is used as a negative current collector, graphite is used as a negative active material to assemble a half cell, and conventional charge and discharge tests are carried out. The assembly and testing was the same as example 1. The results show that the surface roughness is 1Ag-1The first discharge capacity of graphite was 159mAh g at current density using a copper foil to which a layer of copper salt particles was attached-1After 100 cycles, the capacity of the graphite is still maintained at 119mAh g-1。
Example 6
100mL of 0.2mol/L Cu (NO) was prepared3)2Solution (copper nitrate), then, the copper foil was immersed in the solution for 25min, washed with distilled water, and naturally air-dried. Thus obtaining the modified copper foil. The copper foil is used as a negative current collector, graphite is used as a negative active material to assemble a half cell, and conventional charge and discharge tests are carried out. The assembly and testing was the same as example 1. The results show that the surface roughness is 1Ag-1When a copper foil having a copper salt particle adhered thereto was used at a current density, the first discharge capacity of graphite was 150mAh g-1After 100 cycles, the capacity of the graphite is still maintained at 120mAh g-1。
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A lithium ion battery is assembled by using copper foil as a negative current collector and using a graphite material as a main negative active material; it is characterized in that: the copper foil is a copper foil to which a layer of copper salt particles is attached.
2. The lithium ion battery according to claim 1, characterized in that: the copper foil with the layer of copper salt particles is obtained by immersing the copper foil into 100mL of 0.1-0.8 mol/L copper salt solution, immersing for 10-40 min, cleaning with distilled water, and naturally drying.
3. The lithium ion battery according to claim 2, characterized in that: the copper salt solution is CuCl2Solution, CuBr2Solution, Cu (NO)3)2Solution, CuSO4One of the solutions.
4. The lithium ion battery according to claim 3, characterized in that: the copper salt is copper chloride, and the substance generated on the surface of the copper foil is cuprous chloride.
5. The lithium ion battery according to claim 3, characterized in that: 100mL of 0.2mol/L CuBr is prepared2And (3) solution, then, placing the copper foil in the solution for soaking for 20min, washing by using distilled water, and naturally drying by air. Thus obtaining the modified copper foil.
6. A method for improving the capacity and rate capability of commercial graphite, which is characterized by comprising the following steps:
step 1: selecting a copper foil;
step 2: preparing 100mL of 0.1-0.8 mol/L copper salt solution;
and step 3: and (3) placing the copper foil in the copper salt solution, soaking for 10-30 min, cleaning with distilled water, and naturally drying. Obtaining the copper foil attached with a layer of copper salt particles;
and 4, step 4: weighing graphite, acetylene black and polyvinylidene fluoride according to the mass ratio of 8:1:1, grinding the graphite, acetylene black and polyvinylidene fluoride in an agate mortar to uniformly mix the three substances, dropwise adding a proper amount of N-methyl pyrrolidone and preparing the N-methyl pyrrolidone into paste, uniformly pressing and smearing the paste on the copper foil attached with the layer of copper salt particles by using a glass sheet, and then putting the copper foil coated with the graphite in a vacuum drying box for vacuum drying;
and 5: after natural cooling, graphite and lithium sheets are respectively used as two electrodes, Celgard2400 is used as a diaphragm, and the diaphragm contains 1mol/L LiPF6The organic solution of (a) is an electrolyte, and a half cell is assembled in a glove box filled with high-purity nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010325071.4A CN113555560A (en) | 2020-04-23 | 2020-04-23 | Method for improving commercial graphite capacity and rate capability and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010325071.4A CN113555560A (en) | 2020-04-23 | 2020-04-23 | Method for improving commercial graphite capacity and rate capability and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113555560A true CN113555560A (en) | 2021-10-26 |
Family
ID=78129300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010325071.4A Pending CN113555560A (en) | 2020-04-23 | 2020-04-23 | Method for improving commercial graphite capacity and rate capability and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113555560A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114551899A (en) * | 2022-02-25 | 2022-05-27 | 河北师范大学 | Method for improving electrochemical performance of lithium battery negative electrode material lithium titanate |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102024941A (en) * | 2010-11-06 | 2011-04-20 | 合肥国轩高科动力能源有限公司 | Surface treatment method for copper foil of negative current collector of lithium ion battery |
| JP2014032929A (en) * | 2012-08-06 | 2014-02-20 | Sh Copper Products Corp | Copper foil for current collector and negative electrode collector for lithium ion secondary battery using the same |
| CN104485459A (en) * | 2014-11-13 | 2015-04-01 | 昆明理工大学 | Method for preparing copper foil for lithium ion battery through low eutectic type ionic liquid electro-deposition |
| CN105609761A (en) * | 2015-09-10 | 2016-05-25 | 昆明理工大学 | Application of CuCl/Cu composite material |
| CN107686123A (en) * | 2017-08-02 | 2018-02-13 | 盐城师范学院 | A kind of solid liquid interface fast preparation method of cuprous bromide crystal thin-film material |
| CN109346699A (en) * | 2018-10-15 | 2019-02-15 | 盐城师范学院 | A kind of preparation method of copper oxide/graphene combination electrode material |
| CN109860514A (en) * | 2019-03-25 | 2019-06-07 | 河北师范大学 | A method of changing lithium battery copper foil of affluxion body surface topography |
| CN110156065A (en) * | 2019-06-15 | 2019-08-23 | 盐城师范学院 | A kind of preparation method of stannous chloride hollow cube |
| CN110203961A (en) * | 2019-06-12 | 2019-09-06 | 河北师范大学 | A method of preparing cuprous bromide at room temperature |
-
2020
- 2020-04-23 CN CN202010325071.4A patent/CN113555560A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102024941A (en) * | 2010-11-06 | 2011-04-20 | 合肥国轩高科动力能源有限公司 | Surface treatment method for copper foil of negative current collector of lithium ion battery |
| JP2014032929A (en) * | 2012-08-06 | 2014-02-20 | Sh Copper Products Corp | Copper foil for current collector and negative electrode collector for lithium ion secondary battery using the same |
| CN104485459A (en) * | 2014-11-13 | 2015-04-01 | 昆明理工大学 | Method for preparing copper foil for lithium ion battery through low eutectic type ionic liquid electro-deposition |
| CN105609761A (en) * | 2015-09-10 | 2016-05-25 | 昆明理工大学 | Application of CuCl/Cu composite material |
| CN107686123A (en) * | 2017-08-02 | 2018-02-13 | 盐城师范学院 | A kind of solid liquid interface fast preparation method of cuprous bromide crystal thin-film material |
| CN109346699A (en) * | 2018-10-15 | 2019-02-15 | 盐城师范学院 | A kind of preparation method of copper oxide/graphene combination electrode material |
| CN109860514A (en) * | 2019-03-25 | 2019-06-07 | 河北师范大学 | A method of changing lithium battery copper foil of affluxion body surface topography |
| CN110203961A (en) * | 2019-06-12 | 2019-09-06 | 河北师范大学 | A method of preparing cuprous bromide at room temperature |
| CN110156065A (en) * | 2019-06-15 | 2019-08-23 | 盐城师范学院 | A kind of preparation method of stannous chloride hollow cube |
Non-Patent Citations (3)
| Title |
|---|
| 《无线电与电视》编辑部: "《晶体管收音机》", 30 November 1981 * |
| XIAO, ZE EN 等: "Microcrystalline copper foil as a high performance collector for lithium-ion batteries", 《JOURNAL OF POWER SOURCES》 * |
| 尹福炎: "《金属箔式应变片制作工艺原理》", 31 August 2011 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114551899A (en) * | 2022-02-25 | 2022-05-27 | 河北师范大学 | Method for improving electrochemical performance of lithium battery negative electrode material lithium titanate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109713279B (en) | Preparation method of foamy copper oxide-based lithium ion battery negative electrode material | |
| CN104993125B (en) | A kind of lithium ion battery negative material Fe3O4The preparation method of/Ni/C | |
| CN108063219A (en) | A kind of high efficiency liquid alkali metal alloy electrode and its preparation method and application | |
| CN108963204A (en) | Silicon substrate/sulfide cathode material preparation method of one type graphene interlayers structure | |
| CN108682813A (en) | A kind of preparation method and application of Si-C composite material | |
| CN109686953A (en) | A kind of lithium-sulfur battery composite cathode material and preparation method thereof | |
| Luo et al. | In situ construction of efficient interface layer with lithiophilic nanoseeds toward dendrite‐free and low N/P ratio Li metal batteries | |
| CN107579233A (en) | A kind of metal-doped silicon oxide molecular sieve/sulphur carbon complex and its preparation method and application | |
| CN106340633A (en) | Composite nano material for high performance lithium ion battery and preparation method thereof | |
| CN105390702A (en) | Foam-nickel-based carbon nano tube doped Sn/SnO/SnO2 layered three-dimensional porous anode material and preparation method thereof | |
| CN106935861A (en) | A kind of sodium-ion battery carbon negative pole material and preparation method thereof | |
| CN108365172A (en) | A kind of lithium an- ode material and its preparation method and application of natural polymers protection | |
| CN109449379A (en) | A kind of SnFe that nitrogen-doped carbon is compound2O4Lithium ion battery negative material and the preparation method and application thereof | |
| CN106129361B (en) | A kind of lithium ion battery anode active material and preparation method | |
| CN110098396A (en) | A kind of lithium-sulfur battery composite cathode material and preparation method thereof and battery | |
| CN112421051A (en) | Preparation method of cuprous oxide modified copper foil at room temperature | |
| CN105895871B (en) | A kind of porous Si-C composite material and preparation method and application | |
| CN108492996A (en) | A kind of preparation method of fluorine, nitrogen co-doped class graphene film layer material | |
| CN107394150A (en) | A kind of mesoporous silicon copper composition electrode material and its preparation method and application | |
| CN108735994A (en) | A kind of preparation method of N doping hollow carbon sphere | |
| CN109713259B (en) | Lithium ion battery silicon-carbon composite negative electrode material and preparation method and application thereof | |
| CN105529447A (en) | Preparation method and application of carbon nanotube-carbon-porous silicon composite material | |
| CN110718692A (en) | Fluoride stabilizing layer of lithium-sulfur battery, preparation method of fluoride stabilizing layer and lithium-sulfur battery | |
| CN112687875B (en) | Preparation method and application of nickel molybdate flexible film composite material | |
| CN108963245A (en) | A kind of mesoporous cobaltosic oxide electrode material of lamellar and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211026 |
|
| RJ01 | Rejection of invention patent application after publication |