CN105914429B - A kind of flexible heat conducting film and preparation method based on functional group's graphene reduction - Google Patents
A kind of flexible heat conducting film and preparation method based on functional group's graphene reduction Download PDFInfo
- Publication number
- CN105914429B CN105914429B CN201610251132.0A CN201610251132A CN105914429B CN 105914429 B CN105914429 B CN 105914429B CN 201610251132 A CN201610251132 A CN 201610251132A CN 105914429 B CN105914429 B CN 105914429B
- Authority
- CN
- China
- Prior art keywords
- graphene
- nitrogen
- heat conducting
- filter membrane
- conducting film
- 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
Classifications
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The present invention relates to a kind of preparation methods of the flexible heat conducting film based on functional group's graphene reduction, it is characterised in that is made of by weight percentage 2% ~ 10% graphene microchip and 90% ~ 98% miillpore filter；Wherein graphene microchip is graphene oxide or nitrogen-doped graphene microplate, and thickness is the nm of 5 nm ~ 80, and piece diameter is 1 μm ~ 5 μm；Its method filled by vacuum filter repeatedly makes graphene microchip be embedded in the hole of miillpore filter, and method is simple, prepared by the large area for being conducive to heat conducting film.The heat conducting film can carry out a degree of bending according to the shape of lithium battery, and then it is made closely to be bonded with lithium battery outer surface, to reach preferably heat dissipation effect.
Description
Technical field
The present invention relates to a kind of flexible heat conducting films and preparation method based on functional group's graphene reduction, are a kind of graphenes
Heat conducting film, more particularly to a kind of Flexible graphene membrane preparation method with heat conduction function.The heat conducting film can be pasted on battery
Outside in monomer, or outside batteries are wrapped in, to improve the radiating efficiency of battery, reduce internal temperature of battery.
Background technology
In recent years, with mobile communication, the high speed development of portable electronic device, it is greatly promoted in electrochmical power source
The development of secondary cell.In the secondary battery, due to lithium ion battery have voltage is high, small, light weight, it is higher than energy,
Memory-less effect, pollution-free, self discharge is small, the advantages that having extended cycle life, and becomes the emphasis of secondary cell development.However, lithium
Battery is extremely sensitive for temperature, if be chronically in the environment of overheat, can substantially reduce the service life of battery, seriously
Overheat, electrolyte decomposition, internal pressure increase cause explosion, even if do not explode battery if can rapidly be scrapped in high fever.Cause
The heat that battery generates, is rapidly and uniformly conducted the raising that will be helpful to battery safety and service life by this.
Graphite material belongs to nonmetal crystal material, and heat conduction mainly passes through the vibration of lattice, i.e. lattice wave（Phonon）It is logical
Mutual restrict for crossing crystal structure unit realizes the conduction of heat with mutually coordinated vibration.Graphene is with carbon carbon sp2It is miscellaneous
The carbon simple substance of hexagonal lattice structure made of change, forms big pi-conjugated key, and the mean free path of the phonon of graphene is far longer than
The phonon free path of high-heat conductivity graphite material and other materials on ordinary meaning, about 775 nm of phonon free path, through meter
The thermal conductivity that calculation can obtain graphene is up to 5300 W/mK.In addition, telescoped inside graphene under room temperature, wherein electronics by
The interference arrived is very small, and to electronics freedom of movement, the wherein movement rate of electronics reaches the 1/300 of the light velocity, greatly exceeds
Movement rate of the electronics in general conductor, electron mobility is up to 15000 cm at room temperature2/ (Vs) has been more than any gold
The electron mobility of category.This exoelectron moves in electron orbit, will not be scattered because of lattice defect or foreign atom.From
This respect says that the heat conduction of graphene is realized by The Wave Behavior of Electrons.Therefore, in two aspect collective effects of phonon and electronics
Under, make graphene that there is outstanding heat conductivility.
Invention content
The purpose of the present invention is to provide a kind of Flexible graphene heat conducting film, the heat conducting film can according to the shape of lithium battery into
The a degree of bending of row, and then it is made closely to be bonded with lithium battery outer surface, to reach preferably heat dissipation effect.
It is another object of the present invention to provide a kind of preparations of the flexible heat conducting film based on functional group's graphene reduction
Method, the method filled by vacuum filter repeatedly make graphene microchip be embedded in the hole of miillpore filter, and method is simple,
It is prepared conducive to the large area of heat conducting film.
In order to achieve the above object, the technical proposal of the invention is realized in this way：
A kind of Flexible graphene heat conducting film, it is characterised in that by weight percentage by 2% ~ 10% graphene microchip and 90% ~
98% miillpore filter composition；Wherein graphene microchip is graphene oxide or nitrogen-doped graphene microplate, and thickness is 5 nm ~ 80
Nm, piece diameter are 1 μm ~ 5 μm；
Miillpore filter is acetate fiber composite fibre miillpore filter, PP polypropylene filters, nylon66 fiber filter membrane, PVDF gather inclined fluorine
Ethylene filter membrane, PTFE polytetrafluoroethylene (PTFE) hydrophilic film, PTFE polytetrafluoroethylene (PTFE) hydrophobic membrane, BT glass fiber filters, the filter of PES polyether sulfones
One kind in film；Aperture is 8 μm ~ 18 μm, a diameter of mm of 25 mm ~ 400.
A kind of preparation method of graphene flexibility heat conducting film, it is characterised in that specific preparation process is as follows：
Using ultrasonic method, graphene oxide or nitrogen-doped graphene are scattered in solvent, the solvent be ultra-pure water water,
N ~ methyl pyrrolidone（NMP）, dimethylformamide（DMF）, tetrahydrofuran (THF), one or both of ethylene glycol and with
On mixture, a concentration of 1 mg/ml ~ 10mg/ml of dispersion liquid.
Using centrifuge, graphene oxide or nitrogen-doped graphene dispersion liquid are subjected to 1 h of centrifugal treating ~ 5h, rotating speed
For 1000 r/min ~ 3000r/min, sediment is removed.
Using Vacuum filtration device, the graphene oxide for being crossed centrifugal treating by filter membrane or nitrogen-doped graphene dispersion
Liquid is filtered for multiple times, and is replaced the positive/negative face of filter membrane after filtering every time and is continued to filter, graphene oxide or nitrogen-doped graphene is made to ooze
Enter into the internal void of filter membrane, until dispersion liquid becomes to clarify, filtering times are 10 times ~ 40 times.
The filter membrane for being supported with graphene oxide or nitrogen-doped graphene is placed under 60 DEG C ~ 120 DEG C vacuum conditions dry
4h~8h。
Filter membrane after drying is subjected to high-temperature process under atmosphere protection.Wherein, protective atmosphere is nitrogen, argon gas, helium
One kind in gas, high-temperature process temperature are 200 DEG C ~ 600 DEG C, and handling duration is 4h ~ 8h.
The positive effect of the present invention is the Flexible graphene heat conducting film that there is filter membrane to support, and possesses excellent thermal conductivity, machine
Tool intensity and flexibility.Flexural deformation can be carried out according to the shape of lithium battery, be closely bonded with lithium battery outer surface, such as Fig. 2-
Shown in 4.
Description of the drawings
Fig. 1 is Flexible graphene heat conducting film material object photo.
Fig. 2 is Flexible graphene heat conducting film practical application schematic diagram 1.
Fig. 3 is Flexible graphene heat conducting film practical application schematic diagram 2.
Fig. 4 is Flexible graphene heat conducting film practical application schematic diagram 3.
Specific implementation mode
The present invention will be further described with reference to the accompanying drawings and examples：
Embodiment 1
Using ultrasonic cell disruptor, graphene oxide is scattered according to the concentration of 2mg/ml in ultra-pure water, ultrasound
A length of 3h when dispersion.By dispersion liquid centrifugal treating 1h, centrifuge speed 1000r/min, bottom precipitation is removed, supernatant is taken.
It uses aperture to carry out positive/negative face to the dispersion liquid that centrifugal treating is crossed for 12 μm of acetate fiber filter membrane alternately to filter, filtering times
It is 20 times.Then, the filter membrane for being supported with graphene oxide is placed under 80 DEG C of vacuum conditions and is dried 5h.Finally, it will dry
The 400 DEG C of processing 5h under argon atmosphere protection of filter membrane afterwards, obtain graphene flexibility heat conducting film 1, as shown in Figure 1.Graphene is soft
Property heat conducting film 1 can be used for the heat dissipation of the battery in battery pack monomer 2 by 18650 type battery compositions, as shown in Fig. 2, graphene is soft
Property heat conducting film 1 can be fitted in battery cell surface according to the distribution form of the battery cell 2 in battery pack with snakelike pattern.
Embodiment 2
Using ultrasonic cell disruptor, nitrogen-doped graphene is scattered according to the concentration of 5mg/ml in DMF, ultrasound point
A length of 4h when dissipating.By dispersion liquid centrifugal treating 3h, centrifuge speed 2000r/min, bottom precipitation is removed, supernatant is taken.It adopts
The polypropylene filter for being 14 μm with aperture carries out positive/negative face to the dispersion liquid that centrifugal treating is crossed and alternately filters, filtering times 30
It is secondary.Then, the filter membrane for being supported with nitrogen-doped graphene is placed under 90 DEG C of vacuum conditions and is dried 6h.It finally, will be after drying
Filter membrane nitrogen atmosphere protection under 200 DEG C processing 6h, obtain graphene flexibility heat conducting film 1, as shown in Figure 1.Graphene is flexible
Heat conducting film 1 can be used for the heat dissipation of the battery in battery pack monomer 2 by 18650 type battery compositions, as shown in figure 3, graphene is flexible
Heat conducting film 1 can be fitted in battery cell surface according to the distribution form of the battery cell 2 in battery pack with the pattern of S-shaped.
Embodiment 3
Using ultrasonic cell disruptor, graphene oxide is scattered according to the concentration of 8mg/ml in THF, ultrasonic disperse
Shi Changwei 3h.By dispersion liquid centrifugal treating 4h, centrifuge speed 3000r/min, bottom precipitation is removed, supernatant is taken.Using
The PVDF Kynoar filter membrane that aperture is 16 μm carries out positive/negative face to the dispersion liquid that centrifugal treating is crossed and alternately filters, filtering time
Number is 35 times.Then, the filter membrane for being supported with graphene oxide is placed under 80 DEG C of vacuum conditions and is dried 8h.Finally, it will do
Filter membrane after dry handles 7h for 400 DEG C under argon atmosphere protection, obtains graphene flexibility heat conducting film 1, as shown in Figure 1.Graphene
Flexible heat conducting film 1 can be used for the heat dissipation of rectangular battery cell 2, as shown in figure 4, graphene flexibility heat conducting film 1 can be according to rectangular
The external form of battery is fitted tightly over battery cell surface.
Embodiment 4
Using ultrasonic cell disruptor, nitrogen-doped graphene is scattered according to the concentration of 10mg/ml in ethylene glycol, is surpassed
Sound a length of 5h when disperseing.By dispersion liquid centrifugal treating 2h, centrifuge speed 2500r/min, bottom precipitation is removed, supernatant is taken
Liquid.It uses aperture to carry out positive/negative face to the dispersion liquid that centrifugal treating is crossed for 18 μm of BT glass fiber filters alternately to filter, filtering
Number is 40 times.Then, the filter membrane for being supported with nitrogen-doped graphene is placed under 60 DEG C of vacuum conditions and is dried 4h.Finally,
Filter membrane after drying is handled into 8h for 200 DEG C under the protection of helium atmosphere, obtains graphene flexibility heat conducting film 1, as shown in Figure 1.
Claims (2)
1. a kind of Flexible graphene heat conducting film, it is characterised in that by weight percentage by 2% ~ 10% graphene microchip and 90%
~ 98% miillpore filter composition；Wherein graphene microchip is graphene oxide or nitrogen-doped graphene microplate, thickness be 5 nm ~
80nm, piece diameter are 1 μm ~ 5 μm；Miillpore filter is acetate fiber composite fibre miillpore filter, PP polypropylene filters, nylon66 fiber
Filter membrane, PVDF Kynoar filter membrane, PTFE polytetrafluoroethylene (PTFE) hydrophilic film, PTFE polytetrafluoroethylene (PTFE) hydrophobic membrane, BT glass fibres
One kind in filter membrane, PES polyethersulfone membranes；Aperture is 8 μm ~ 18 μm, a diameter of mm of 25 mm ~ 400.
2. a kind of preparation method of graphene flexibility heat conducting film, it is characterised in that specific preparation process is as follows：
(1) use ultrasonic method, graphene oxide or nitrogen-doped graphene are scattered in solvent, the solvent be ultra-pure water, N ~
The mixture of one or more of methyl pyrrolidone NMP, dimethylformamide DMF, tetrahydrofuran THF, ethylene glycol,
A concentration of 1 mg/ml ~ 10mg/ml of dispersion liquid；
(2) centrifuge is utilized, graphene oxide or nitrogen-doped graphene dispersion liquid are subjected to 1 h of centrifugal treating ~ 5h, rotating speed is
1000 r/min ~ 3000r/min remove sediment；
(3) utilize Vacuum filtration device, the graphene oxide for centrifugal treating being crossed by filter membrane or nitrogen-doped graphene dispersion liquid
It is filtered for multiple times, replaces the positive/negative face of filter membrane after filtering every time and continue to filter, graphene oxide or nitrogen-doped graphene is made to penetrate into
Into the internal void of filter membrane, until dispersion liquid becomes to clarify, filtering times are 10 times ~ 40 times；
(4) filter membrane for being supported with graphene oxide or nitrogen-doped graphene is placed under 60 DEG C ~ 120 DEG C vacuum conditions dry 4h
~8h；(5) filter membrane after drying is subjected to high-temperature process under atmosphere protection；Wherein, protective atmosphere is in nitrogen, argon gas, helium
One kind, high-temperature process temperature be 200 DEG C ~ 600 DEG C, handling duration be 4h ~ 8h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610251132.0A CN105914429B (en) | 2016-04-21 | 2016-04-21 | A kind of flexible heat conducting film and preparation method based on functional group's graphene reduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610251132.0A CN105914429B (en) | 2016-04-21 | 2016-04-21 | A kind of flexible heat conducting film and preparation method based on functional group's graphene reduction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105914429A CN105914429A (en) | 2016-08-31 |
| CN105914429B true CN105914429B (en) | 2018-10-23 |
Family
ID=56747637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610251132.0A Active CN105914429B (en) | 2016-04-21 | 2016-04-21 | A kind of flexible heat conducting film and preparation method based on functional group's graphene reduction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105914429B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107645065A (en) * | 2017-09-08 | 2018-01-30 | 西安工程大学 | A kind of preparation method of onion carbon/MXene stratiform Wave suction composite materials |
| CN107720722A (en) * | 2017-10-27 | 2018-02-23 | 西安理工大学 | A kind of nitrogenous multi-stage porous Carbon Materials and its preparation method and application |
| CN107946082A (en) * | 2017-10-27 | 2018-04-20 | 西安理工大学 | A kind of preparation method and its usage of cigarette filter/graphene composite material |
| CN110066174A (en) * | 2019-04-30 | 2019-07-30 | 冯德远 | A kind of preparation method of Flexible graphene composite heat conduction film |
| CN110844902B (en) * | 2019-11-20 | 2023-05-26 | 常州富烯科技股份有限公司 | Graphite foam and preparation method thereof |
| CN113620711B (en) * | 2021-08-26 | 2022-08-19 | 江西宁新新材料股份有限公司 | Graphite high-thermal-conductivity film and preparation method thereof |
| CN114956066A (en) * | 2022-06-30 | 2022-08-30 | 安徽宇航派蒙健康科技股份有限公司 | Graphene composite heat-conducting film and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964432A (en) * | 2010-09-16 | 2011-02-02 | 南京双登科技发展研究院有限公司 | Battery pack heat dissipation method for electric automobile |
| CN103240007A (en) * | 2013-05-13 | 2013-08-14 | 嵇天浩 | Method for preparing graphene-oxide-filled microfiltration composite material |
| CN104743551A (en) * | 2015-03-27 | 2015-07-01 | 上海应用技术学院 | Method for preparing reduced graphene oxide heat conductive film |
| WO2015121118A1 (en) * | 2014-02-12 | 2015-08-20 | Siemens Aktiengesellschaft | Electric energy storage device and method for extracting the heat from an electric energy storage device |
| CN205033658U (en) * | 2015-08-06 | 2016-02-17 | 常州富烯科技股份有限公司 | Compound heat conduction membrane of graphite alkene |
-
2016
- 2016-04-21 CN CN201610251132.0A patent/CN105914429B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964432A (en) * | 2010-09-16 | 2011-02-02 | 南京双登科技发展研究院有限公司 | Battery pack heat dissipation method for electric automobile |
| CN103240007A (en) * | 2013-05-13 | 2013-08-14 | 嵇天浩 | Method for preparing graphene-oxide-filled microfiltration composite material |
| WO2015121118A1 (en) * | 2014-02-12 | 2015-08-20 | Siemens Aktiengesellschaft | Electric energy storage device and method for extracting the heat from an electric energy storage device |
| CN104743551A (en) * | 2015-03-27 | 2015-07-01 | 上海应用技术学院 | Method for preparing reduced graphene oxide heat conductive film |
| CN205033658U (en) * | 2015-08-06 | 2016-02-17 | 常州富烯科技股份有限公司 | Compound heat conduction membrane of graphite alkene |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105914429A (en) | 2016-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105914429B (en) | A kind of flexible heat conducting film and preparation method based on functional group's graphene reduction | |
| CN110010964B (en) | Porous membrane reinforced polymer-plastic crystal solid electrolyte membrane, and preparation method and application thereof | |
| TWI481103B (en) | Electrode, lithium-ion battery, lithium rechargeable cell anode, electrochemical cell, method of fabricating the same, and uses thereof | |
| CN105470515B (en) | A kind of safe lithium ion power battery anode and the lithium ion battery containing the positive pole | |
| CN104409774B (en) | 3D printing method of lithium battery | |
| CN105355877B (en) | A kind of graphene metal oxide composite cathode material and preparation method thereof | |
| CN104393304B (en) | Lithium selenium cell positive electrode and preparation method thereof and lithium selenium cell | |
| CN105336930A (en) | Nitrogen-enriched carbon based/sulfur composite cathode material used for lithium sulphur batteries, and preparation method thereof | |
| CN108574079A (en) | A kind of polyalkene diaphragm for high polymer lithium battery | |
| CN107039646A (en) | Flexible negative material of a kind of lithium ion battery and preparation method thereof | |
| CN103700815A (en) | Flexible transparent lithium ion battery electrode material and preparation method thereof | |
| CN106450245B (en) | A kind of flexibility can charge and discharge lithium sulfur battery anode material and preparation method thereof | |
| CN109713402B (en) | Solar photo-thermal lithium battery capable of working in extreme temperature range and preparation method thereof | |
| Gong et al. | Thermosensitive polyacrylonitrile/polyethylene oxide/polyacrylonitrile membrane separators for prompt and safer thermal lithium-ion battery shutdown | |
| CN106207086A (en) | High power capacity solid lithium ion battery negative material and battery cathode and preparation method thereof | |
| WO2022012075A1 (en) | Porous carbon-graphene composite material and preparation method therefor | |
| CN107394118A (en) | A kind of preparation method and applications of self-supporting flexible electrode | |
| CN104638246A (en) | Graphene-based flexible lithium-sulfur battery positive electrode material, preparation method of positive electrode material and preparation method of positive electrode | |
| CN108091840A (en) | A kind of preparation method of composite cathode material for lithium ion cell | |
| CN107879323A (en) | A kind of hard carbon material and its preparation method and application | |
| CN106252638B (en) | A kind of silicon/oxide composite negative pole material and preparation method with lithium metasilicate boundary layer | |
| CN109850886A (en) | A kind of cellular graphite material and the preparation method and application thereof | |
| WO2022161438A1 (en) | Boron-containing modified diaphragm and preparation method and application therefor, and battery including diaphragm | |
| CN103456984B (en) | A kind of manufacture method of inorganic solid electrolyte film | |
| CN113235300B (en) | Preparation method of high-temperature-resistant lithium ion battery composite diaphragm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |