CN108461713A - A kind of preparation method of Graphene electrodes - Google Patents
A kind of preparation method of Graphene electrodes Download PDFInfo
- Publication number
- CN108461713A CN108461713A CN201810173134.1A CN201810173134A CN108461713A CN 108461713 A CN108461713 A CN 108461713A CN 201810173134 A CN201810173134 A CN 201810173134A CN 108461713 A CN108461713 A CN 108461713A
- Authority
- CN
- China
- Prior art keywords
- graphene
- preparation
- graphene electrodes
- substrate
- positive electrode
- 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
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
- H01M4/139—Processes of manufacture
- H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention relates to the making of electrode, and in particular to a kind of preparation method of Graphene electrodes.The Graphene electrodes include anode, and the preparation process of the anode is as follows：It takes LiFePO4 and Kynoar to be dissolved in solvent N methyl pyrrolidones to form mixed liquor and stir 2 to 6 hours in blender；Mixed liquor after stirring is coated in positive electrode substrate, the dry, roll-in under the drying temperature more than 100 DEG C；Via molecular beam epitaxy, at a temperature of more than 100 DEG C, single-layer graphene is spun in the positive electrode substrate of positive electrode and obtains the conductive substrate of multi-layer compound film electrode.The preparation method of Graphene electrodes provided by the present invention can effectively control the various performance parameters of graphene/tin electrode, and process is simple, be suitble to various industrialized productions.
Description
Technical field
The present invention relates to the making of electrode, and in particular to a kind of preparation method of Graphene electrodes.
Background technology
Lithium ion battery has than energy the excellent properties such as high, memory-less effect, environmental-friendly, has been widely used for moving
The Portable movables electric appliance such as mobile phone and laptop.As power battery, lithium ion battery is in electric bicycle and electronic
It is also with a wide range of applications on automobile.The electrode material of lithium ion battery mainly uses graphite material (such as at present：Graphite is micro-
Ball, natural modified graphite and artificial graphite etc.), these graphite materials have preferable stable circulation performance, but its capacity compared with
Low, the theoretical capacity of graphite is 372mAh/g.Lithium ion battery of new generation carries the capacity and stable circulation performance of electrode material
Higher requirement is gone out, not requiring nothing more than electrode material has high electrochemistry capacitance, and has good stable circulation performance
And high-rate characteristics.But the service life of lithium battery is limited, it is to cause it that can not answer that high power charging-discharging characteristic is not still good enough
Used in the field of quick charge.
Graphene is a kind of new material for the individual layer laminated structure being made of carbon atom, it has superpower electric conductivity,
And higher carrier mobility so that electronics, lithium ion largely can quickly migrate and hardly right on its surface
Respective carrier has any loss.Therefore how to apply to grapheme material in electrode is technical staff institute purpose to be achieved.
Invention content
A kind of preparation method of Graphene electrodes provided by the invention, the use longevity for solving lithium battery in the prior art
Order limited, high power charging-discharging characteristic is not still good enough and can not apply the quick charge field the problem of.
A kind of Graphene electrodes preparation method in the present invention, the Graphene electrodes include anode, the system of the anode
It is standby that steps are as follows：
A, it takes LiFePO4 and Kynoar to be dissolved in solvent N-methyl pyrilidone and forms mixed liquor；
B, above-mentioned mixed liquor is stirred 2 to 6 hours in blender, it is made to be uniformly mixed；
C, the mixed liquor after stirring is coated in positive electrode substrate, it is dry under the drying temperature more than 100 DEG C, it goes forward side by side
Row roll-in；
D, via molecular beam epitaxy, at a temperature of more than 100 DEG C, single-layer graphene is being spun on positive electrode just
The conductive substrate of multi-layer compound film electrode is obtained in electrode basement, the graphene thickness is not more than 1000nm.
The preparation method of above-mentioned Graphene electrodes, wherein
In step a, the mass ratio ranging from 95 of the LiFePO4 and Kynoar:5 to 97:3；
In step b, blender rotating speed is 2000rpm, and mixing time is 4 hours.
The preparation method of above-mentioned Graphene electrodes, wherein
In step c, the positive electrode substrate is aluminium foil；The drying temperature is 120 DEG C；
In step d, the molecular beam epitaxy carries out in 300 DEG C to 1000 DEG C of environment.
The preparation method of above-mentioned Graphene electrodes, wherein the Graphene electrodes further include cathode, the system of the cathode
It is standby that steps are as follows：
A1, via molecular beam epitaxy, at a temperature of 300 DEG C~1000 DEG C, by single-layer graphene in negative electrode substrate
Superposition growth, obtains the conductive substrate of multi-layer compound film electrode；The graphene thickness is not more than 1000nm；B1, to described
Conductive substrate carries out processing of bringing down a fever.
The preparation method of above-mentioned Graphene electrodes, wherein the Graphene electrodes further include cathode, the system of the cathode
It is standby that steps are as follows：
A2, via molecular beam epitaxy, at a temperature of 300 DEG C~1000 DEG C, by tin and single-layer graphene alternately negative
Growth is superimposed in electrode basement；The tin, graphene thickness be not more than 1000nm；
B2, processing of bringing down a fever is carried out to the conductive substrate.
The preparation method of above-mentioned Graphene electrodes, wherein in step a1, the negative electrode substrate is not more than for thickness
The graphite or copper foil of 50nm.
The preparation method of above-mentioned Graphene electrodes, wherein thickness be the graphite no more than 50nm by molecular beam outside
The mode of prolonging is made.
The preparation method of Graphene electrodes provided by the invention is coated on electrode base by using novel grapheme material
On the ground, the performance that can greatly promote existing battery makes it have the conductivity of superelevation, more suitable specific surface area, this
Kind novel electrode electric conductivity is excellent, possesses abundanter hole, can greatly improve the transmission rate of lithium ion, increases
The contact area of electrode material and electrolyte enhances rate charge-discharge performance, and effectively improves the cycle life of battery, reduces
The generation of irreversible capacity, this preparation method can effectively control the various performance parameters of graphene/tin electrode, and process is simple,
It is suitble to various industrialized productions.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, not
Constitute limitation of the invention.In the accompanying drawings：
Fig. 1 is a kind of flow chart of the preparation method of Graphene electrodes in the embodiment of the present invention；
Fig. 2 is that the LiFePO4 grapheme composite positive electrode material with 3-D nano, structure is illustrated in the embodiment of the present invention
Figure.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is implemented below in conjunction with the accompanying drawings
Example is described in further detail.Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but it is not intended as
Limitation of the invention.
The embodiment of the present invention provides a kind of preparation method of Graphene electrodes, and the Graphene electrodes include anode, such as Fig. 1
Shown, the preparation process of the anode is as follows：
Step 101, it takes LiFePO4 and Kynoar to be dissolved in solvent N-methyl pyrilidone and forms mixed liquor；This
Step can not also use solvent N-methyl pyrilidone, and directly carry out LiFePO4 and graphene outside molecular beam in substrate
Prolong.
Step 102, above-mentioned mixed liquor is stirred 2 to 6 hours in blender, it is made to be uniformly mixed；
Step 103, the mixed liquor after stirring is coated in positive electrode substrate, and under the drying temperature more than 100 DEG C
It is dry, and carry out roll-in；Preferably, positive electrode base material is metal material.
Step 104, via molecular beam epitaxy, at a temperature of more than 100 DEG C, single-layer graphene positive material has been spun on
The conductive substrate of multi-layer compound film electrode is obtained in the positive electrode substrate of material, the graphene thickness is not more than 1000nm.Tool
Body, single-layer graphene is overlapped growth on coated on the positive electrode substrate for having positive electrode, it is thin to obtain MULTILAYER COMPOSITE
The conductive substrate of membrane electrode.
Preferably, graphene be grain size 10nm -100um black powder, be by single layer to 1000 layers it is parallel or close
It is a kind of two dimensional crystal, maximum is characterized in that, wherein the fortune of electronics in the carbonaceous material that parallel graphene sheet layer is constituted
Scanning frequency degree reaches the 1/300 of the light velocity.
By the preparation method for the Graphene electrodes that above-described embodiment is provided, the property of existing battery can greatly be promoted
Can, so that it is had the conductivity of superelevation, more suitable specific surface area, this novel electrode electric conductivity is excellent, possesses more
Abundant hole can greatly improve the transmission rate of lithium ion, increase the contact area of electrode material and electrolyte, increase
Strong rate charge-discharge performance, and effectively improve the cycle life of battery, reduces the generation of irreversible capacity, this preparation method,
The various performance parameters of graphene can be effectively controlled, process is simple, is suitble to various industrialized productions.
The preparation method for the Graphene electrodes that the embodiment of the present invention is provided, preferably,
In step 101, the mass ratio ranging from 95 of the LiFePO4 and Kynoar:5 to 97:3；
In step 102, blender rotating speed is 2000rpm, and mixing time is 4 hours.
The preparation method for the Graphene electrodes that the embodiment of the present invention is provided, preferably,
In step 103, the electrode basement is aluminium foil；The drying temperature is 120 DEG C；
In step 104, the molecular beam epitaxy carries out in 300 DEG C to 1000 DEG C of environment.
The preparation method for the Graphene electrodes that the embodiment of the present invention is provided, preferably, the Graphene electrodes further include
The preparation process of cathode, the cathode is as follows：
A1, via molecular beam epitaxy, at a temperature of 300 DEG C~1000 DEG C, by single-layer graphene in negative electrode substrate
Superposition growth, obtains the conductive substrate of multi-layer compound film electrode；The graphene thickness is not more than 1000nm；
B1, processing of bringing down a fever is carried out to the conductive substrate.
The preparation method for the Graphene electrodes that the embodiment of the present invention is provided, preferably, the Graphene electrodes further include
The preparation process of cathode, the cathode is as follows：
A2, via molecular beam epitaxy, at a temperature of 300 DEG C~1000 DEG C, by tin and single-layer graphene alternately negative
Growth is superimposed in electrode basement；The tin, graphene thickness be not more than 1000nm；
B2, processing of bringing down a fever is carried out to cathode.
The preparation method for the Graphene electrodes that the embodiment of the present invention is provided, preferably, in step a1, the electrode base
Bottom is the graphite or copper foil that thickness is not more than 50nm.
The preparation method for the Graphene electrodes that the embodiment of the present invention is provided, preferably, thickness is the institute no more than 50nm
Graphite is stated to be made of molecular beam epitaxy mode.
In the above embodiment of the present invention, its capacity can reach 400-2400mAh/g, library after tin is added in negative material
Human relations efficiency is 89-99.7%, and graphene and tin mass ratio are 1：0.5~10, in this case, graphene cathode, even if carrying out charge and discharge
Electric rate is the fast charging and discharging of 40C, and the capacity density of electrode is stablized in 410mAh/g or more, and output density reaches 10KW/kg, than
Capacity is up to 750mAh/g, and after tin is added, specific capacity is up to 780mAh/g, 400-1600 square meters of specific surface area/g, conductivity
It is 6 × 104s/m—11×104s/m。
The graphene battery that the embodiment of the present invention is provided can obtain electrode in 2.0-3.6V, 1C conditions by experiment
For lower cycle after 1000 weeks, capacity can still keep 91% after being maintained at 98%, 2000 weeks.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (7)
1. a kind of preparation method of Graphene electrodes, which is characterized in that the Graphene electrodes include anode, the system of the anode
It is standby that steps are as follows：
A, it takes LiFePO4 and Kynoar to be dissolved in solvent N-methyl pyrilidone and forms mixed liquor；
B, above-mentioned mixed liquor is stirred 2 to 6 hours in blender, it is made to be uniformly mixed；
C, the mixed liquor after stirring is coated in positive electrode substrate, it is dry under the drying temperature more than 100 DEG C, and carry out roller
Pressure；
D, via molecular beam epitaxy, at a temperature of more than 100 DEG C, single-layer graphene is spun on to the positive electrode of positive electrode
The conductive substrate of multi-layer compound film electrode is obtained in substrate, the graphene thickness is not more than 1000nm.
2. the preparation method of Graphene electrodes as described in claim 1, which is characterized in that
In step a, the mass ratio ranging from 95 of the LiFePO4 and Kynoar:5 to 97:3；
In step b, blender rotating speed is 2000rpm, and mixing time is 4 hours.
3. the preparation method of Graphene electrodes as claimed in claim 2, which is characterized in that
In step c, the positive electrode substrate is aluminium foil；The drying temperature is 120 DEG C；
In step d, the molecular beam epitaxy carries out in 300 DEG C to 1000 DEG C of environment.
4. the preparation method of Graphene electrodes as described in claim 1, which is characterized in that the Graphene electrodes further include bearing
The preparation process of pole, the cathode is as follows：
A1, via molecular beam epitaxy, at a temperature of 300 DEG C~1000 DEG C, single-layer graphene is superimposed in negative electrode substrate
Growth, obtains the conductive substrate of multi-layer compound film electrode；The graphene thickness is not more than 1000nm；B1, to the conduction
Substrate carries out processing of bringing down a fever.
5. the preparation method of Graphene electrodes as described in claim 1, which is characterized in that the Graphene electrodes further include bearing
The preparation process of pole, the cathode is as follows：
A2, via molecular beam epitaxy, at a temperature of 300 DEG C~1000 DEG C, by tin and single-layer graphene alternately in negative electrode
Growth is superimposed in substrate；The tin, graphene thickness be not more than 1000nm；
B2, processing of bringing down a fever is carried out to the conductive substrate.
6. the preparation method of Graphene electrodes as described in claim 4 or 5, which is characterized in that in step a1, the negative electricity
Pole substrate is the graphite or copper foil that thickness is not more than 50nm.
7. the preparation method of Graphene electrodes as claimed in claim 6, which is characterized in that thickness is no more than described in 50nm
Graphite is made of molecular beam epitaxy mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810173134.1A CN108461713A (en) | 2018-03-02 | 2018-03-02 | A kind of preparation method of Graphene electrodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810173134.1A CN108461713A (en) | 2018-03-02 | 2018-03-02 | A kind of preparation method of Graphene electrodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108461713A true CN108461713A (en) | 2018-08-28 |
Family
ID=63216993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810173134.1A Pending CN108461713A (en) | 2018-03-02 | 2018-03-02 | A kind of preparation method of Graphene electrodes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108461713A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021017598A1 (en) * | 2019-07-26 | 2021-02-04 | 瑞新材料科技(香港)有限公司 | Method for manufacturing electrode having protective layer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514344A (en) * | 2015-11-28 | 2016-04-20 | 哈尔滨工业大学 | Method for realizing surface modification of negative electrode of lithium ion battery through electrophoretic deposition of graphene |
| US20160344020A1 (en) * | 2015-05-22 | 2016-11-24 | National Cheng Kung University | Composite electrode material and method for manufacturing the same |
| CN206282929U (en) * | 2016-12-13 | 2017-06-27 | 深圳市富玉铭电子有限公司 | A kind of graphene lithium ion battery structure |
| CN107546376A (en) * | 2017-06-27 | 2018-01-05 | 中国第汽车股份有限公司 | A kind of Graphene electrodes and preparation method thereof |
-
2018
- 2018-03-02 CN CN201810173134.1A patent/CN108461713A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160344020A1 (en) * | 2015-05-22 | 2016-11-24 | National Cheng Kung University | Composite electrode material and method for manufacturing the same |
| CN105514344A (en) * | 2015-11-28 | 2016-04-20 | 哈尔滨工业大学 | Method for realizing surface modification of negative electrode of lithium ion battery through electrophoretic deposition of graphene |
| CN206282929U (en) * | 2016-12-13 | 2017-06-27 | 深圳市富玉铭电子有限公司 | A kind of graphene lithium ion battery structure |
| CN107546376A (en) * | 2017-06-27 | 2018-01-05 | 中国第汽车股份有限公司 | A kind of Graphene electrodes and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 中国科学技术协会主编: "《2012-2013电子信息学科发展报告》", 31 December 2014 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021017598A1 (en) * | 2019-07-26 | 2021-02-04 | 瑞新材料科技(香港)有限公司 | Method for manufacturing electrode having protective layer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | Unity convoluted design of solid li‐ion battery and triboelectric nanogenerator for self‐powered wearable electronics | |
| Ma et al. | Enhanced cycle performance of Li–S battery with a polypyrrole functional interlayer | |
| Chao et al. | A V2O5/conductive‐polymer core/shell nanobelt array on three‐dimensional graphite foam: a high‐rate, ultrastable, and freestanding cathode for lithium‐ion batteries | |
| CN110176591B (en) | Aqueous zinc ion secondary battery and preparation method of anode based on organic electrode material | |
| CN106328992B (en) | A kind of preparation method of lithium ion battery and the lithium ion battery | |
| CN105470576B (en) | A kind of high pressure lithium battery electric core and preparation method thereof, lithium ion battery | |
| TWI487171B (en) | Positive electrode and lithium ion battery | |
| CN102544502A (en) | Anode and cathode conductive additive for secondary lithium battery, method for preparing conductive additive, and method for preparing secondary lithium battery | |
| TW201539851A (en) | Lithium ion battery | |
| CN104810504A (en) | Flexible graphene current collector and active material integrated electrode pole piece and preparation method thereof | |
| CN102306783A (en) | Multi-layer graphene/lithium iron phosphate intercalated composite material, preparation method thereof, and lithium ion battery adopting multi-layer grapheme/lithium iron phosphate intercalated composite material as anode material | |
| CN101794874A (en) | Electrode with grapheme as conductive additive and application thereof in lithium ion battery | |
| CN105489814A (en) | Preparation method for modified diaphragm for lithium-sulfur battery, modified diaphragm and lithium-sulfur battery adopting multiple layers of modified diaphragms | |
| Im et al. | Two-dimensional, P-doped Si/SiOx alternating veneer-like microparticles for high-capacity lithium-ion battery composite | |
| CN108428855A (en) | A kind of preparation method and lithium ion battery of utter misery foil | |
| CN108461729B (en) | Tellurium-sulfur composite carbon material and preparation method and application thereof | |
| TW201607117A (en) | Method of preparation a battery electrode by spray coating, an electrode and a battery made by method thereof | |
| Jiang et al. | Recent advances and perspectives on prelithiation strategies for lithium-ion capacitors | |
| CN105742561A (en) | Preparation method and application of flexible self-supporting composite electrode | |
| He et al. | Silicon/graphene/carbon hierarchical structure nanofibers for high performance lithium ion batteries | |
| Chen et al. | High-performance all-solid-state flexible asymmetric supercapacitors composed of PPy@ Ti3C2Tx/CC and Ti3C2Tx/CC electrodes | |
| CN111554889A (en) | polyimide/MXene composite material and preparation and application thereof | |
| Lin et al. | Preinserted Li metal porous carbon nanotubes with high Coulombic efficiency for lithium-ion battery anodes | |
| CN104882590A (en) | Preparation method of carbon/ graphite/ silicon composited anode material | |
| CN109786751A (en) | A kind of negative current collector and preparation method thereof and solid state 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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180828 |