CN112909268B - Porous carbon air electrode of metal-air battery and preparation method thereof - Google Patents
Porous carbon air electrode of metal-air battery and preparation method thereof Download PDFInfo
- Publication number
- CN112909268B CN112909268B CN202110169787.4A CN202110169787A CN112909268B CN 112909268 B CN112909268 B CN 112909268B CN 202110169787 A CN202110169787 A CN 202110169787A CN 112909268 B CN112909268 B CN 112909268B
- Authority
- CN
- China
- Prior art keywords
- metal
- air electrode
- porous carbon
- air
- slurry
- 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.)
- Active
Links
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
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8817—Treatment of supports before application of the catalytic active composition
-
- 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
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/8647—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites
- H01M4/8657—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites layered
-
- 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
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/96—Carbon-based electrodes
-
- 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
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M2004/8678—Inert electrodes with catalytic activity, e.g. for fuel cells characterised by the polarity
- H01M2004/8689—Positive electrodes
-
- 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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention relates to a preparation method of a porous carbon air electrode of a metal-air battery, which comprises the following steps: 1) taking carbon fiber cloth with a certain area as a substrate; 2) placing polytetrafluoroethylene and carbon black in an ethanol solution, and stirring to form mixed slurry to obtain hydrophobic coating slurry; 3) stirring polyvinylidene fluoride powder and carbon black to form mixed slurry to obtain hydrophilic coating slurry; 4) uniformly coating the hydrophobic coating slurry on the carbon fiber substrate; 5) covering the carbon fiber substrate with the hydrophilic coating slurry; 6) coating the hydrophobic coating slurry on a carbon fiber substrate and drying for a period of time; 7) and (4) heating the carbon fiber substrate prepared in the step (6) at a high temperature to prepare the air electrode. The invention solves the problem that the oxygen diffusion rate in the anode porous electrode and the electrochemical reaction field can not be balanced in the discharging process of the metal-air battery, so that the battery discharge capacity is lower. The invention also relates to a porous carbon air electrode of a metal-air battery.
Description
Technical Field
The invention relates to the field of air batteries, in particular to a porous carbon air electrode of a metal-air battery and a preparation method thereof.
Background
The current energy utilization system based on fossil fuel faces the increasingly serious problems of environmental pollution and resource exhaustion, and the demand of economic and social development for clean energy and renewable energy is increasingly urgent. Energy storage technology is very important for the utilization of renewable energy. Among the existing electrochemical energy storage technologies, metal-air batteries are receiving much attention because of their large theoretical energy density. The metal-air battery is an electrochemical energy storage device which takes active metal as a negative electrode, takes oxygen in air as a positive electrode active substance and contains electrolyte, and mainly comprises lithium-air, zinc-air, magnesium-air and the like. Compared with the lithium ion battery which is applied more at present, the positive active material of the metal-air battery is derived from air, and does not need to be stored, thereby greatly reducing the battery cost and simultaneously improving the energy density of the battery. Therefore, the battery has wide application prospect in the fields of portable electronic products, transportation, electric power systems and the like.
Although the metal-air battery has higher theoretical energy density, the metal-air battery still faces the problem of lower discharge capacity in the actual discharge process, and the marketization application of the battery is influenced.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a porous carbon air electrode of a metal-air battery and a preparation method thereof.
The technical scheme for solving the technical problems is as follows:
a preparation method of a porous carbon air electrode of a metal-air battery comprises the following steps:
step 1, taking carbon fiber cloth with a certain area as a substrate;
step 4, uniformly coating the hydrophobic coating slurry prepared in the step 2 on a carbon fiber substrate, and drying for a period of time;
step 5, covering the hydrophilic coating slurry prepared in the step 3 on the carbon fiber substrate prepared in the step 4, and drying for a period of time;
step 6, covering the hydrophobic coating slurry prepared in the step 2 on the carbon fiber substrate prepared in the step 5, and drying for a period of time;
and 7, heating the carbon fiber substrate prepared in the step 6 at a high temperature to prepare the air electrode.
The invention has the beneficial effects that: the air electrode has a four-layer structure from bottom to top, and comprises a carbon fiber substrate, a hydrophobic coating, a hydrophilic coating and a hydrophobic coating. Wherein the hydrophobic coating is used for increasing the oxygen diffusion rate, and the hydrophilic coating is used for increasing the effective reaction area. The mixed hydrophilic and hydrophobic characteristics are configured in the air electrode, so that the discharge capacity of the metal-air battery is improved, and the problem that the discharge capacity of the battery is low due to the fact that the oxygen diffusion rate in the positive porous electrode and an electrochemical reaction field cannot be balanced in the discharging process of the metal-air battery is solved.
On the basis of the technical scheme, the invention can be further improved as follows.
Preferably, the polytetrafluoroethylene in the hydrophobic coating slurry accounts for 5 to 35 percent of the total mass of the polytetrafluoroethylene and the carbon black in percentage by mass.
Preferably, in the step 2, the beaker containing the mixed slurry is placed in water at 25 ℃ for ultrasonic oscillation until the mixed slurry is uniform.
Preferably, the polytetrafluoroethylene in the hydrophobic coating slurry accounts for 5 to 35 percent of the total mass of the polytetrafluoroethylene and the carbon black in percentage by mass.
Preferably, in the step 3, the beaker containing the mixed slurry is placed in water at 25 ℃ for ultrasonic oscillation until the mixed slurry is uniform.
Preferably, the thickness of the coating layer in the step 4 is 0.1-0.25 mm, and the coating layer is dried for 6-8 hours at room temperature.
Preferably, the thickness of the coating in the step 5 is 0.1-0.25 mm, and the coating is dried at room temperature for 6-8 hours.
Preferably, the thickness of the coating in the step 6 is 0.1-0.25 mm, and the coating is dried at room temperature for 6-8 hours.
Preferably, the carbon fiber substrate prepared in step 7 through step 6 is heated at 350 ℃ for 30 minutes.
The invention also provides a porous carbon air electrode of the metal-air battery, which is prepared by using the preparation method of the porous carbon air electrode of the metal-air battery in any one of the technical schemes.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention or the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a porous carbon air electrode of a metal-air battery according to an embodiment of the present invention;
fig. 2 is a graph illustrating a measurement of a wetting angle of a porous carbon air electrode of a metal-air battery according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a lithium-air battery using a porous carbon air electrode of a metal-air battery according to an embodiment of the present invention;
fig. 4 is a lithium-oxygen battery discharge curve using a porous carbon air electrode of a metal-air battery according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
In the prior art, in the discharge process of a metal-air battery, a negative metal electrode is subjected to oxidation reaction, oxygen enters a positive electrode from the outside and reaches a reaction area through a diffusion process to complete reduction reaction. Most of the positive electrode is a porous carbon electrode, and after the positive electrode is soaked by an electrolyte solution, the inner wall of a hole in the porous electrode can be used as an effective electrochemical reaction site. Meanwhile, the porous electrode provides a passage for oxygen diffusion. The diffusion rate of oxygen in the porous electrode and the area of the effective reaction sites in the interior of the electrode become key factors in controlling the discharge of the positive electrode, thereby affecting the performance of the metal-air battery. Hydrophilic electrodes are advantageous for increasing reaction sites, while hydrophobic electrodes are advantageous for enhancing oxygen diffusion. Therefore, an electrode having appropriate hydrophilicity and hydrophobicity can improve the discharge performance of the metal-air battery.
As soon as possible, the metal-air battery has higher theoretical energy density, but in the actual discharging process, the metal-air battery still faces the problem of lower discharging capacity, which affects the marketization application of the battery. At present, a porous carbon electrode of a metal-air battery anode mostly adopts a single wettability design, and the requirements of increasing the oxygen diffusion rate and increasing the reaction sites cannot be met simultaneously. Therefore, the design of the porous carbon air electrode of the metal-air battery with mixed hydrophilic and hydrophobic characteristics is a problem to be solved in the field.
As shown in fig. 1, which is a schematic structural diagram of a porous carbon air electrode of a metal-air battery according to an embodiment of the present invention, the present application provides a method for preparing a porous carbon air electrode of a metal-air battery, including the following steps:
step 1, taking carbon fiber cloth with a certain area as a substrate;
step 4, uniformly coating the hydrophobic coating slurry prepared in the step 2 on a carbon fiber substrate, and drying for a period of time;
step 5, covering the hydrophilic coating slurry prepared in the step 3 on the carbon fiber substrate prepared in the step 4, and drying for a period of time;
step 6, covering the hydrophobic coating slurry prepared in the step 2 on the carbon fiber substrate prepared in the step 5, and drying for a period of time;
and 7, heating the carbon fiber substrate prepared in the step 6 at a high temperature to prepare the air electrode.
Based on the above embodiment, preferably, the mass percentage of the polytetrafluoroethylene in the hydrophobic coating slurry accounts for 5% to 35% of the total mass of the polytetrafluoroethylene and the carbon black.
Preferably, in the step 2, the beaker containing the mixed slurry is placed in water at 25 ℃ for ultrasonic oscillation until the mixed slurry is uniform.
Preferably, the polytetrafluoroethylene in the hydrophobic coating slurry accounts for 5 to 35 percent of the total mass of the polytetrafluoroethylene and the carbon black in percentage by mass.
Preferably, in the step 3, the beaker containing the mixed slurry is placed in water at 25 ℃ for ultrasonic oscillation until the mixed slurry is uniform.
Preferably, the thickness of the coating in the step 4 is 0.1-0.25 mm, and the coating is dried at room temperature for 6-8 hours.
Preferably, the thickness of the coating in the step 5 is 0.1-0.25 mm, and the coating is dried at room temperature for 6-8 hours.
Preferably, the thickness of the coating in the step 6 is 0.1-0.25 mm, and the coating is dried at room temperature for 6-8 hours.
Preferably, the carbon fiber substrate prepared in step 7 through step 6 is heated at 350 ℃ for 30 minutes.
Specifically, for example, in practical operation, 1) a carbon fiber substrate is taken, the thickness of the carbon fiber substrate is 0.35mm, and the area of the carbon fiber substrate is 4cm multiplied by 4 cm;
2) placing 85 mass percent of acetylene black carbon black and 15 mass percent of polytetrafluoroethylene (emulsion concentration is 60%) in an ethanol solution, and placing a beaker filled with the mixed slurry in water at 25 ℃ for ultrasonic oscillation for 1.5 hours until the mixed slurry is uniform;
3) placing 85 mass percent of acetylene black carbon black and 15 mass percent of polyvinylidene fluoride into an ethanol solution, and placing a beaker filled with the mixed slurry into water at 25 ℃ for ultrasonic oscillation for 1.5 hours until the mixed slurry is uniform;
4) uniformly coating hydrophobic coating slurry containing 15% of polytetrafluoroethylene on a carbon fiber substrate by using a coating device, wherein the thickness of the coating is 0.2mm, and drying at room temperature for 6 hours;
5) respectively and uniformly coating 5% polyvinylidene fluoride hydrophilic coating on the hydrophobic coating in the step 4) by using a coating device, wherein the thickness of the coating is 0.2mm, and drying for 6 hours at room temperature;
6) respectively and uniformly coating 5% polyvinylidene fluoride hydrophilic coatings on the hydrophilic coatings in the step 5) by using a coating device, wherein the thickness of the coating is 0.2mm, and drying for 6 hours at room temperature;
7) and (3) placing the air electrode coated with the mixed hydrophilic-hydrophobic coating in a high-temperature heating furnace, heating for 30 min at 350 ℃, removing ethanol, and uniformly distributing the adhesive (polytetrafluoroethylene and polyvinylidene fluoride) in the coating to obtain the air electrode.
Under room temperature and normal pressure, as shown in fig. 2, a static wetting angle of the surface of a porous carbon air electrode of a metal-air battery with mixed hydrophilicity and hydrophobicity is measured by using a wetting angle measuring device, the used solution is 1mo L/L of organic electrolyte solution L I TFS I/TEGDME, the droplet volume is 5 μ L, the wetting angle retention time exceeds 120s, and the measured static wetting angle is 118.8 degrees.
Under room temperature and normal pressure, as shown in fig. 3-4, a lithium-air battery is used for testing the discharge performance of the prepared electrode, the discharge current is 0.1mA/cm2, and the testing electrodes are respectively the air electrode with mixed hydrophilicity and hydrophobicity, the hydrophobic electrode with polytetrafluoroethylene 15% by mass and the hydrophilic electrode with polyvinylidene fluoride 15% by mass. As shown in the results of FIG. 4, the discharge capacity (5149.5mAh/g) of the hybrid hydrophilic and hydrophobic air electrode provided by the present invention is much higher than that of the hydrophobic electrode (4160.8mAh/g) and the hydrophilic electrode (1665.8mAh/g) with the same mass percent binder content.
The invention also provides a porous carbon air electrode of the metal-air battery, which is prepared by using the preparation method of the porous carbon air electrode of the metal-air battery in any one of the technical schemes.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A preparation method of a porous carbon air electrode of a metal-air battery is characterized by comprising the following steps:
step 1, taking carbon fiber cloth with a certain area as a substrate;
step 2, placing polytetrafluoroethylene and carbon black in an ethanol solution, and stirring to form mixed slurry to obtain hydrophobic coating slurry;
step 3, putting polyvinylidene fluoride and carbon black into an ethanol solution, and stirring to form mixed slurry to obtain hydrophilic coating slurry;
step 4, uniformly coating the hydrophobic coating slurry prepared in the step 2 on a carbon fiber substrate, and drying for a period of time;
step 5, covering the hydrophilic coating slurry prepared in the step 3 on the carbon fiber substrate prepared in the step 4, and drying for a period of time;
step 6, covering the hydrophobic coating slurry prepared in the step 2 on the carbon fiber substrate prepared in the step 5, and drying for a period of time;
step 7, heating the carbon fiber substrate prepared in the step 6 at a high temperature to prepare an air electrode;
the polytetrafluoroethylene in the hydrophobic coating slurry accounts for 5-35% of the total mass of the polytetrafluoroethylene and the carbon black in percentage by mass, wherein the hydrophobic coating is used for improving the oxygen diffusion rate, and the hydrophilic coating is used for increasing the area of an effective reaction area.
2. The method for preparing a porous carbon air electrode of a metal-air battery according to claim 1, wherein in the step 2, the beaker containing the mixed slurry is placed in water at 25 ℃ for ultrasonic oscillation until the mixed slurry is uniform.
3. The method for preparing a porous carbon air electrode of a metal-air battery according to claim 1, wherein in the step 3, the beaker containing the mixed slurry is placed in water at 25 ℃ for ultrasonic oscillation until the mixed slurry is uniform.
4. The method for preparing a porous carbon air electrode of a metal-air battery according to claim 1, wherein the coating thickness in the step 4 is 0.1-0.25 mm, and the porous carbon air electrode is dried at room temperature for 6-8 hours.
5. The method for preparing a porous carbon air electrode of a metal-air battery according to claim 1, wherein the coating thickness in the step 5 is 0.1-0.25 mm, and the porous carbon air electrode is dried at room temperature for 6-8 h.
6. The method for preparing a porous carbon air electrode of a metal-air battery according to claim 1, wherein the coating thickness in step 6 is 0.1-0.25 mm, and the porous carbon air electrode is dried at room temperature for 6-8 h.
7. The method for preparing a porous carbon air electrode for a metal-air battery according to claim 1, wherein the carbon fiber substrate prepared in step 7 through step 6 is heated at 350 ℃ for 30 minutes.
8. A porous carbon air electrode for a metal-air battery, characterized in that the electrode is prepared using the method for preparing a porous carbon air electrode for a metal-air battery according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110169787.4A CN112909268B (en) | 2021-02-08 | 2021-02-08 | Porous carbon air electrode of metal-air battery and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110169787.4A CN112909268B (en) | 2021-02-08 | 2021-02-08 | Porous carbon air electrode of metal-air battery and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112909268A CN112909268A (en) | 2021-06-04 |
| CN112909268B true CN112909268B (en) | 2022-06-24 |
Family
ID=76123754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110169787.4A Active CN112909268B (en) | 2021-02-08 | 2021-02-08 | Porous carbon air electrode of metal-air battery and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112909268B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151530A (en) * | 2012-12-21 | 2013-06-12 | 中国科学院大连化学物理研究所 | Negative electrode for metal air battery and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2010131536A1 (en) * | 2009-05-13 | 2012-11-01 | 日本電気株式会社 | Catalyst electrode, fuel cell, air cell and power generation method |
| US20120082922A1 (en) * | 2010-10-01 | 2012-04-05 | Kyushu University, National University Corporation | Composite electrode material and method of producing the same, negative electrode for metal-air battery, and metal-air battery |
| CN103956505B (en) * | 2014-04-16 | 2016-04-13 | 武汉理工新能源有限公司 | A kind of fuel battery gas diffusion layer with water-retaining property and preparation method thereof and membrane electrode assembly and application |
-
2021
- 2021-02-08 CN CN202110169787.4A patent/CN112909268B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151530A (en) * | 2012-12-21 | 2013-06-12 | 中国科学院大连化学物理研究所 | Negative electrode for metal air battery and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112909268A (en) | 2021-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106711430A (en) | Production method of lithium/carbon fiber or porous carbon paper/copper foil composite negative electrode used for lithium-sulfur battery | |
| CN108539203B (en) | Super-hydrophilic material modified electrode material for energy storage flow battery | |
| CN104592541B (en) | Micropore polybenzimidazole membrane and modified polyphenyl and imidazoles are the lithium-sulfur cell of barrier film | |
| CN102623717B (en) | Membrane electrode preparation method and membrane electrode | |
| CN105428614A (en) | Nitrogen-doped porous composite negative electrode material and preparation method therefor | |
| CN112670543B (en) | Composite solid electrolyte membrane based on hollow MOF (metal organic framework) and preparation method and application thereof | |
| CN111313111A (en) | Heteroatom-doped carbon/CoS based on metal organic framework derivation2Functional material and application thereof | |
| CN107069043A (en) | Lithium ion battery and preparation method thereof | |
| CN109037630B (en) | A kind of phosphorus doping carbon coating Na3V2(PO4)2O2F positive electrode and preparation method thereof | |
| CN113046768A (en) | Potassium vanadyl fluorophosphate, preparation method and application thereof, and potassium ion battery | |
| CN109244370B (en) | Preparation method of secondary lithium metal battery cathode steam protective film | |
| CN108461758B (en) | Cathode electrode for all-vanadium redox flow battery, preparation method of cathode electrode and all-vanadium redox flow battery | |
| CN108390110B (en) | Lead-manganese secondary battery | |
| CN114142047A (en) | Preparation method of high-permeability gas diffusion layer for fuel cell | |
| CN112909268B (en) | Porous carbon air electrode of metal-air battery and preparation method thereof | |
| CN110556560B (en) | Catechol positive electrode electrolyte and application thereof in flow battery | |
| CN114094096B (en) | Method for forming protective polymer film on surface of sodium titanium phosphate negative electrode material, product and application thereof | |
| CN109904452A (en) | The preparation method of sodium base Dual-ion cell based on carbon fiber negative electrode material | |
| CN105977508B (en) | A kind of lithium-air battery assisting electrode layer and its methods for making and using same | |
| Wenhong et al. | Study of the electrochemical properties of a transition metallic ions modified electrode in acidic VOSO4 solution | |
| CN108390083B (en) | Discharge working mode starting method of combined regenerative fuel cell system | |
| CN101409348A (en) | Method for preparing air seal effect resistance anode for direct methanol fuel cell | |
| CN106129425A (en) | A kind of porous carbon electrode material and its preparation method and application | |
| CN103904273B (en) | Electrochemical power source separation membrane and preparation method thereof, electrochemical cell or capacitor | |
| CN109286007A (en) | The compound carbon coating Ga of graphene2O3The preparation method of negative electrode of lithium ion battery |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |