CN103579630A - Preparation method for aluminum foil current collector and application - Google Patents
Preparation method for aluminum foil current collector and application Download PDFInfo
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- CN103579630A CN103579630A CN201210249126.3A CN201210249126A CN103579630A CN 103579630 A CN103579630 A CN 103579630A CN 201210249126 A CN201210249126 A CN 201210249126A CN 103579630 A CN103579630 A CN 103579630A
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- aluminum foil
- current collector
- foil current
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- 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
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- 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
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
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- 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
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- 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 invention provides a preparation method for an aluminum foil current collector. The method comprises the steps of: providing a clean aluminum foil, placing it in chemical vapor deposition equipment, and performing sealing; introducing a protective gas into the equipment, at the same time turning on a vacuum system, starting heating when the air pressure is 1-100Pa, then turning on plasma equipment when heated to 500-600DEG C, introducing a carbon-containing gas, maintaining the status for 100-300min, at the end of reaction, stopping heating, turning off the plasma equipment, stopping introducing the carbon-containing gas, and carrying out cooling to room temperature in a protective gas atmosphere, thus obtaining aluminum foil current collector with grapheme growing on the surface. The preparation method for the aluminum foil current collector provided by the invention has a simple preparation process, the contact internal resistance between the prepared aluminum foil current collector with grapheme growing on the surface and a battery active material is greatly reduced, and the phenomenon of embedding lithium ions into the aluminum foil can be prevented, so that the cyclic stability and service life of the lithium ion battery can be improved.
Description
Technical field
The present invention relates to the synthetic preparation field of new material, particularly relate to a kind of preparation method and application of aluminum foil current collector.
Background technology
Collector is a kind of structure or part that collects electric current, major function is that the electric current that cell active materials is produced collects, electron channel is provided, accelerating electric charge shifts, improve and discharge and recharge a coulomb efficiency, as collector, need to meet the features such as conductivity is high, good mechanical property, quality is light, internal resistance is little.
Graphene is a kind of Two-dimensional Carbon atomic crystal of the discoveries such as the strong K sea nurse of the peace moral of Univ Manchester UK in 2004 (Andre K.Geim), because its unique structure and photoelectric property become the study hotspot in the fields such as material with carbon element, nanometer technology, Condensed Matter Physics and functional material, many scientific workers have been attracted.Graphene has good conduction, heat conductivility and low thermal coefficient of expansion, can be used for electrode material, composite material etc.
At present, lithium ion cell positive collector is generally used aluminium foil, and in charging process, aluminium foil directly contacts electrolyte, and therefore, corrosion phenomenon more easily occurs collector; In addition, aluminium foil and active material adhere to not firm, and interface is difficult to combine closely, and has affected the utilance of electrode material and has increased contact resistance; In addition, can there is embedding lithium with aluminium foil and react in lithium ion, destroys aluminium foil, thereby cause collector stability and life-span to be reduced.The method of at present more conventional this phenomenon of solution is to reduce contact resistance at aluminium foil surface coated with conductive carbon-coating, but still the generation that can not stop embedding lithium to react, and coated with conductive carbon-coating technical sophistication, cost is high, therefore, urgent need is sought a kind of being difficult for and is corroded, and has the lithium ion cell positive collector of excellent compatibility with electrode active material.
Summary of the invention
For addressing the above problem, the present invention aims to provide a kind of preparation method of aluminum foil current collector, the method can make the aluminum foil current collector that superficial growth has Graphene, gained aluminum foil current collector reduces greatly with the internal resistance that contacts between battery active material, and can prevent that lithium ion from embedding the generation of aluminium foil phenomenon, thereby improve cyclical stability and the life-span of lithium ion battery.
First aspect, the preparation method of aluminum foil current collector provided by the invention, comprises the following steps:
(1) provide clean aluminium foil, described aluminium foil is placed in chemical vapor depsotition equipment, sealing;
(2) in described chemical vapor depsotition equipment, pass into protective gas; open vacuum system simultaneously; when being 1 ~ 100Pa, air pressure starts heating; after being heated to 500 ~ 600 ℃, open plasma apparatus; pass into carbonaceous gas; keep 100～300min; after question response finishes; stop heating; close described plasma apparatus, stop passing into described carbonaceous gas, under described protective gas atmosphere, be cooled to room temperature; stop passing into described protective gas, obtain the aluminum foil current collector that superficial growth has Graphene.
The object of step (1) is to provide clean metal aluminum foil.
The clean operation of metal aluminum foil is: the acid solution that is 0.1～0.5mol/L by concentration soaks removes oxide on surface in 5～10 minutes, and then through ethanol, acetone ultrasonic cleaning, within 20 minutes, removes surface and oil contaminant respectively.
Preferably, the thickness of aluminium foil is 6～20 μ m; More preferably, the thickness of aluminium foil is 9～12 μ m.
Preferably, acid solution is one or more in hydrochloric acid, sulfuric acid and nitric acid.
Step (2) is in chemical vapor depsotition equipment, in the process of aluminium foil surface growing graphene.
Preferably, protective gas is one or more in hydrogen, nitrogen and argon gas.
Preferably, the flow of protective gas is 50～100sccm.
Under the high temperature of 500～600 ℃; open plasma apparatus; pass into carbonaceous gas, start to occur to answer, react after 100～300min; stop heating; close plasma apparatus, stop passing into carbonaceous gas, under protective gas atmosphere, be cooled to room temperature; stop passing into protective gas, just obtain the aluminum foil current collector that superficial growth has Graphene.
Preferably, plasma apparatus is radio frequency plasma equipment, and the power of radio frequency adaptation is 500W.
Preferably, carbonaceous gas is one or more in methane, ethane, acetylene, propane, carbon monoxide and ethanol.
Preferably, the flow of carbonaceous gas is 50～200sccm.
Under the high temperature of 500～600 ℃, after carbonaceous gas enters, in aluminium foil surface cracking, carbon is first at aluminium foil surface forming core, and slowly grows up into island, and a plurality of Graphene islands are constantly grown up and contact, and finally form graphene film.
The Graphene growing out from metal aluminum foil and the associativity of aluminium foil are good, and between Graphene and aluminium foil, do not use binding agent, can effectively guarantee the high conductivity of collector.Because Graphene and electrode active material have good compatibility, so superficial growth has the aluminum foil current collector of Graphene, greatly reduces, thereby the whole internal resistance of cell is reduced with the internal resistance that contacts between battery active material.Graphene layer can effectively be avoided electrolyte and the direct contact corrosion aluminium foil of aluminium foil, can also effectively stop lithium ion to embed aluminium foil from active material layer, thereby improves cyclical stability and the life-span of lithium ion battery.Graphene has high conductivity, and because the generation of Graphene is to rely on the cracking of carbonaceous gas deposition to obtain, so crystal structure is complete, has superperformance, thus each performance of collector can effectively be improved.
Second aspect, the invention provides the application in lithium ion cell positive collector of aluminum foil current collector that said method makes.
Provided by the inventionly based on chemical vapour deposition technique, prepare the method that superficial growth has the aluminum foil current collector of Graphene, there is following beneficial effect:
(1) whole preparation process is the vapor-phase thermal cracking deposition under HTHP, and preparation technology is simple, and cost is low, is easy to realize large-scale industrial and produces;
(2) aluminum foil current collector making by preparation method of the present invention, graphene layer is combined with aluminium foil closely, and between Graphene and aluminium foil, do not use binding agent, can effectively guarantee the high conductivity of collector, Graphene and electrode active material have good compatibility, therefore there is lower contact internal resistance between the two, thereby the internal resistance of lithium battery is reduced greatly;
(3) graphene layer can avoid electrolyte directly to contact with aluminium foil, effectively stops lithium ion to embed aluminium foil from active material layer, thereby improves cyclical stability and the life-span of lithium ion battery, and the capability retention after 300 times that circulates reaches more than 92.3%.
Accompanying drawing explanation
Fig. 1 is the SEM figure of the prepared aluminum foil current collector of the embodiment of the present invention one surface Graphene.
Embodiment
The following stated is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Embodiment mono-
A preparation method for aluminum foil current collector, comprises the following steps:
(1) providing thickness is the aluminium foil of 12 μ m, the hydrochloric acid solution that is 0.1mol/L by concentration by aluminium foil soaks removes oxide on surface for 10 minutes, and then through ethanol, acetone ultrasonic cleaning, within 20 minutes, remove surface and oil contaminant and be placed in chemical vapor depsotition equipment, sealing respectively;
(2) to the hydrogen that passes into 100sccm in described chemical vapor depsotition equipment, open vacuum system simultaneously, when air pressure is 100Pa, start heating; after being heated to 600 ℃, open plasma apparatus (radio frequency adaptation power is 500w); pass into the methane of 100sccm, keep 300min, after question response finishes; stop heating; close plasma apparatus, stop passing into methane, under hydrogen shield, be cooled to room temperature; stop passing into hydrogen, obtain the aluminum foil current collector that superficial growth has Graphene.
Fig. 1 is the SEM figure of the prepared aluminum foil current collector of the embodiment of the present invention one surface Graphene.As can be seen from Figure 1, the Graphene on aluminum foil current collector surface is successfully preparation, and prepared Graphene thickness is about 1～5nm, and Graphene has pleated structure, while being more conducive to prepare electrode material, active material combines with Graphene, increases the adhesion of the two, improves stability.
The present embodiment gained aluminum foil current collector is assembled into lithium ion battery: take 8.5g LiFePO4,1.0g acetylene black and 0.5g PVDF, and add 20g NMP, fully stir and make it to become the slurry mixing.Then by its blade coating in the aluminum foil current collector of cleaning through ethanol, under the vacuum of 0.01MPa, 80 ℃ are dried to constant weight, and are pressed into iron phosphate lithium electrode in 10 ~ 15MPa pressure lower roll, and are cut into anodal disk.Equally, take 4.25g graphite, 0.5g acetylene black and 0.25g butadiene-styrene rubber binding agent, and add 10g NMP, fully stir and make it to become the slurry mixing, then by its blade coating on the common Copper Foil cleaning through ethanol, be pressed into negative plate.By positive plate, celgard2400 polypropylene porous film barrier film, negative plate in order stack of laminations dress up battery core, then use battery housing seal battery core, toward the LiBF that injects 1mol/L in battery container
4/ diethyl carbonate electrolyte, sealing liquid injection port, obtains lithium ion battery.
At 60 ℃ of temperature, in the voltage range of 2.5 ~ 4.2V, utilize charge-discharge test instrument to carry out 1C charge-discharge test to the lithium ion battery assembling in the present embodiment, the specific discharge capacity of the 3rd time is 156mAh/g, carries out after 300 charge and discharge cycles, and capability retention is 92.3%.
For further illustrating beneficial effect of the present invention, spy arranges following comparative example:
Take 8.5g LiFePO4,1.0g acetylene black and 0.5g PVDF, and add 20g NMP, fully stir and make it to become the slurry mixing.Then by its blade coating in the normal aluminium foil of cleaning through ethanol, under the vacuum of 0.01MPa, 80 ℃ are dried to constant weight, and are pressed into iron phosphate lithium electrode in 10 ~ 15MPa pressure lower roll, and are cut into anodal disk.Equally, take 4.25g graphite, 0.5g acetylene black and 0.25g butadiene-styrene rubber binding agent, and add 10g NMP, fully stir and make it to become the slurry mixing, then by its blade coating on the common Copper Foil cleaning through ethanol, be pressed into negative plate.By positive plate, celgard2400 polypropylene porous film barrier film, negative plate in order stack of laminations dress up battery core, then use battery housing seal battery core, toward the LiBF that injects 1mol/L in battery container
4/ diethyl carbonate electrolyte, sealing liquid injection port, obtains lithium ion battery.
After testing, this comparative example's gained lithium ion battery is after 300 charge and discharge cycles, and capability retention is 84.1%.As can be seen here, the aluminum foil current collector that the present embodiment makes, because superficial growth has Graphene, can avoid collector to corrode fast, thereby improves cyclical stability and the life-span of lithium ion battery.
Embodiment bis-
A preparation method for aluminum foil current collector, comprises the following steps:
(1) providing thickness is the aluminium foil of 6 μ m, the salpeter solution that is 0.5mol/L by concentration by aluminium foil soaks removes oxide on surface for 5 minutes, and then through ethanol, acetone ultrasonic cleaning, within 20 minutes, remove surface and oil contaminant and be placed in chemical vapor depsotition equipment, sealing respectively;
(2) to the argon gas that passes into 100sccm in described chemical vapor depsotition equipment, open vacuum system simultaneously, when air pressure is 10Pa, start heating; after being heated to 500 ℃, open plasma apparatus (radio frequency adaptation power is 500w); pass into the acetylene of 50sccm, keep 100min, after question response finishes; stop heating; close plasma apparatus, stop passing into acetylene, under argon shield, be cooled to room temperature; stop passing into argon gas, obtain the aluminum foil current collector that superficial growth has Graphene.
The present embodiment gained aluminum foil current collector is assembled into lithium ion battery (method is with embodiment mono-), at 60 ℃ of temperature, in the voltage range of 2.5 ~ 4.2V, utilize charge-discharge test instrument to carry out 1C charge-discharge test to the lithium ion battery assembling in the present embodiment, the specific discharge capacity of the 3rd time is 160mAh/g, carry out after 300 charge and discharge cycles, capability retention is 94.7%.
Embodiment tri-
A preparation method for aluminum foil current collector, comprises the following steps:
(1) providing thickness is the aluminium foil of 20 μ m, the sulfuric acid solution that is 0.3mol/L by concentration by aluminium foil soaks removes oxide on surface for 8 minutes, and then through ethanol, acetone ultrasonic cleaning, within 20 minutes, remove surface and oil contaminant and be placed in chemical vapor depsotition equipment, sealing respectively;
(2) to the nitrogen that passes into 80sccm in described chemical vapor depsotition equipment, open vacuum system simultaneously, when air pressure is 1Pa, start heating; after being heated to 550 ℃, open plasma apparatus (radio frequency adaptation power is 500w); pass into the ethane of 200sccm, keep 150min, after question response finishes; stop heating; close plasma apparatus, stop passing into ethane, under nitrogen protection, be cooled to room temperature; stop passing into nitrogen, obtain the aluminum foil current collector that superficial growth has Graphene.
The present embodiment gained aluminum foil current collector is assembled into lithium ion battery (method is with embodiment mono-), at 60 ℃ of temperature, in the voltage range of 2.5 ~ 4.2V, utilize charge-discharge test instrument to carry out 1C charge-discharge test to the lithium ion battery assembling in the present embodiment, the specific discharge capacity of the 3rd time is 150mAh/g, carry out after 300 charge and discharge cycles, capability retention is 96.5%.
Embodiment tetra-
A preparation method for aluminum foil current collector, comprises the following steps:
(1) providing thickness is the aluminium foil of 12 μ m, the hydrochloric acid solution that is 0.2mol/L by concentration by aluminium foil soaks removes oxide on surface for 10 minutes, and then through ethanol, acetone ultrasonic cleaning, within 20 minutes, remove surface and oil contaminant and be placed in chemical vapor depsotition equipment, sealing respectively;
(2) to the hydrogen that passes into 50sccm in described chemical vapor depsotition equipment, open vacuum system simultaneously, when air pressure is 50Pa, start heating; after being heated to 580 ℃, open plasma apparatus (radio frequency adaptation power is 500w); pass into the ethanol of 100sccm, keep 200min, after question response finishes; stop heating; close plasma apparatus, stop passing into ethanol, under hydrogen shield, be cooled to room temperature; stop passing into hydrogen, obtain the aluminum foil current collector that superficial growth has Graphene.
The present embodiment gained aluminum foil current collector is assembled into lithium ion battery (method is with embodiment mono-), at 60 ℃ of temperature, in the voltage range of 2.5 ~ 4.2V, utilize charge-discharge test instrument to carry out 1C charge-discharge test to the lithium ion battery assembling in the present embodiment, the specific discharge capacity of the 3rd time is 153mAh/g, carry out after 300 charge and discharge cycles, capability retention is 93.1%.
The superficial growth making by preparation method of the present invention has the aluminum foil current collector of Graphene, and the associativity of aluminium foil and Graphene is good, does not use binding agent between the two; Graphene and electrode active material have good compatibility, therefore have lower contact internal resistance between the two, thereby the internal resistance of lithium battery is reduced greatly; Graphene layer can effectively stop lithium ion to embed aluminium foil from active material layer, thereby improve cyclical stability and the life-span of lithium ion battery, the lithium ion battery that uses this aluminum foil current collector to make as plus plate current-collecting body, the capability retention after 300 times that circulates reaches more than 92.3%.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a preparation method for aluminum foil current collector, is characterized in that, comprises the following steps:
(1) provide clean aluminium foil, described aluminium foil is placed in chemical vapor depsotition equipment, sealing;
(2) in described chemical vapor depsotition equipment, pass into protective gas; open vacuum system simultaneously; when being 1 ~ 100Pa, air pressure starts heating; after being heated to 500 ~ 600 ℃, open plasma apparatus; pass into carbonaceous gas; keep 100～300min; after question response finishes; stop heating; close described plasma apparatus, stop passing into described carbonaceous gas, under described protective gas atmosphere, be cooled to room temperature; stop passing into described protective gas, obtain the aluminum foil current collector that superficial growth has Graphene.
2. the preparation method of aluminum foil current collector as claimed in claim 1, is characterized in that, the thickness of described aluminium foil is 6～20 μ m.
3. the preparation method of aluminum foil current collector as claimed in claim 1, is characterized in that, described protective gas is one or more in hydrogen, nitrogen and argon gas.
4. the preparation method of aluminum foil current collector as claimed in claim 1, is characterized in that, the flow of described protective gas is 50～100sccm.
5. the preparation method of aluminum foil current collector as claimed in claim 1, is characterized in that, described plasma apparatus is radio frequency plasma equipment, and the power of radio frequency adaptation is 500w.
6. the preparation method of aluminum foil current collector as claimed in claim 1, is characterized in that, described carbonaceous gas is one or more in methane, ethane, acetylene, propane, carbon monoxide and ethanol.
7. the preparation method of aluminum foil current collector as claimed in claim 1, is characterized in that, the flow of described carbonaceous gas is 50～200sccm.
8. the preparation method of aluminum foil current collector as claimed in claim 1, it is characterized in that, the clean operation of described aluminium foil is: the acid solution that is 0.1～0.5mol/L by concentration soaks removes oxide on surface in 5～10 minutes, and then through ethanol, acetone ultrasonic cleaning, within 20 minutes, removes surface and oil contaminant respectively.
9. the preparation method of aluminum foil current collector as claimed in claim 8, is characterized in that, described acid solution is one or more in hydrochloric acid, sulfuric acid and nitric acid.
10. as claim 1 ~ 9 is selected the application in lithium ion cell positive collector of aluminum foil current collector that as described in one, method prepares.
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| CN201210249126.3A CN103579630A (en) | 2012-07-18 | 2012-07-18 | Preparation method for aluminum foil current collector and application |
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| CN104064378A (en) * | 2014-07-16 | 2014-09-24 | 哈尔滨工业大学 | Method for manufacturing low-cost three-dimensional-structure graphene-aluminum supercapacitor composite electrode material |
| CN105336912A (en) * | 2015-09-14 | 2016-02-17 | 哈尔滨工业大学 | Method for enhancing lithium ion battery current collector and active material adhesion |
| CN106159316A (en) * | 2016-09-08 | 2016-11-23 | 海悦高科电池技术（大连）有限公司 | A kind of lithium ion cell positive collector and comprise the battery of this collector |
| CN104659371B (en) * | 2013-12-20 | 2017-03-08 | 湖南省正源储能材料与器件研究所 | High organic compatibility carbon-coated aluminum foils of a kind of high temperature resistant low resistance and preparation method thereof |
| CN106784822A (en) * | 2017-01-16 | 2017-05-31 | 安徽益佳通电池有限公司 | A kind of high-voltage lithium ion batteries of volume energy density high |
| CN107221678A (en) * | 2017-07-13 | 2017-09-29 | 北京大学 | A kind of graphene clad aluminum foil and preparation method thereof is with being used as the application in anode current collector of lithium ion battery |
| CN107256970A (en) * | 2017-06-12 | 2017-10-17 | 湖南格兰博智能科技有限责任公司 | A kind of processing method of lithium ion battery base band |
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| WO2018119869A1 (en) * | 2016-12-29 | 2018-07-05 | 北京旭碳新材料科技有限公司 | Aluminum laminated packaging film, and lithium-ion battery using same |
| CN108550787A (en) * | 2018-04-26 | 2018-09-18 | 北京石墨烯研究院 | Lithium ion cell positive and lithium ion battery comprising it |
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| CN104064378A (en) * | 2014-07-16 | 2014-09-24 | 哈尔滨工业大学 | Method for manufacturing low-cost three-dimensional-structure graphene-aluminum supercapacitor composite electrode material |
| CN105336912A (en) * | 2015-09-14 | 2016-02-17 | 哈尔滨工业大学 | Method for enhancing lithium ion battery current collector and active material adhesion |
| CN106159316A (en) * | 2016-09-08 | 2016-11-23 | 海悦高科电池技术（大连）有限公司 | A kind of lithium ion cell positive collector and comprise the battery of this collector |
| WO2018119869A1 (en) * | 2016-12-29 | 2018-07-05 | 北京旭碳新材料科技有限公司 | Aluminum laminated packaging film, and lithium-ion battery using same |
| JP2020513357A (en) * | 2016-12-29 | 2020-05-14 | ベイジン トンシュ カーボン アドヴァンスド マテリアルズ テクノロジー カンパニー リミテッドＢｅｉｊｉｎｇ Ｔｕｎｇｈｓｕ Ｃａｒｂｏｎ Ａｄｖａｎｃｅｄ Ｍａｔｅｒｉａｌｓ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ． | Aluminum / plastic encapsulating film and lithium ion battery using the same |
| CN106784822A (en) * | 2017-01-16 | 2017-05-31 | 安徽益佳通电池有限公司 | A kind of high-voltage lithium ion batteries of volume energy density high |
| CN106784822B (en) * | 2017-01-16 | 2020-08-25 | 安徽益佳通电池有限公司 | High-voltage lithium ion battery with high volume energy density |
| CN107256970A (en) * | 2017-06-12 | 2017-10-17 | 湖南格兰博智能科技有限责任公司 | A kind of processing method of lithium ion battery base band |
| CN107221678A (en) * | 2017-07-13 | 2017-09-29 | 北京大学 | A kind of graphene clad aluminum foil and preparation method thereof is with being used as the application in anode current collector of lithium ion battery |
| CN107579259B (en) * | 2017-08-14 | 2019-08-16 | 重庆大学 | A kind of preparation method of the modified carbon felt of graphene |
| CN107579259A (en) * | 2017-08-14 | 2018-01-12 | 重庆大学 | A kind of graphene is modified the preparation method of carbon felt |
| CN108550787A (en) * | 2018-04-26 | 2018-09-18 | 北京石墨烯研究院 | Lithium ion cell positive and lithium ion battery comprising it |
| CN112751079A (en) * | 2019-10-31 | 2021-05-04 | 苏州微木智能系统有限公司 | Lithium ion battery |
| CN112054162A (en) * | 2020-09-16 | 2020-12-08 | 北京理工大学 | Packaging method of metal lithium reference electrode for lithium battery |
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Application publication date: 20140212 |