CN204333111U - A kind of copper-base graphite alkene polymer lithium battery cathode structure - Google Patents
A kind of copper-base graphite alkene polymer lithium battery cathode structure Download PDFInfo
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- CN204333111U CN204333111U CN201420730560.8U CN201420730560U CN204333111U CN 204333111 U CN204333111 U CN 204333111U CN 201420730560 U CN201420730560 U CN 201420730560U CN 204333111 U CN204333111 U CN 204333111U
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- copper foil
- graphite
- graphene film
- film layer
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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
A kind of copper-base graphite alkene polymer lithium battery cathode structure, comprising: negative pole graphite dielectric substrate, graphene film layer, Copper Foil.Growing graphene thin layer on the negative copper foil of affluxion body of polymer lithium electricity, graphene film skin attachment graphite dielectric substrate.Graphene film layer is as the conductive layer between negative pole graphite dielectric substrate and afflux pole Copper Foil, add the conductive capability of conductive layer, improve the energy density of lithium battery, and graphene film layer and graphite and Copper Foil all chemical bond be firmly combined, reduce the contact resistance between graphite and Copper Foil and thermal resistance, graphene film layer also has good heat conductivility, rapidly the heat that negative pole produces can be derived, reduce because variations in temperature causes negative pole to fall material, add the service life cycle of polymer lithium electricity.
Description
Technical field
The utility model relates to technical field of lithium batteries, is specifically related to a kind of copper-base graphite alkene polymer lithium battery cathode structure.
Background technology
Lithium polymer battery (Li-polymer, also known as high-polymer lithium battery): it is also the one of lithium ion battery, but have compared with liquid lithium battery (Li-ion) that energy density is high, more miniaturized, ultrathin, lightweight, and the multiple clear superiority such as high security, be a kind of novel battery.In shape, lithium polymer battery has ultrathin feature, can coordinate the needs of various product, is made into the battery of any shape and capacity.The minimum thickness that such battery can reach can reach 0.5mm.Poly-lithium battery is one of current fitst water lithium battery.
Lithium battery interior adopts helically coiling or stack structure structure, with a kind of very meticulous and permeability is very strong polyethylene film isolated material forms in positive and negative pole spacing.Positive pole comprises the current collector be made up of cobalt acid lithium (or nickle cobalt lithium manganate, LiMn2O4, LiFePO 4 etc.) and aluminium foil.The current collector that negative pole is made up of graphitized carbon material and Copper Foil forms.Organic polyelectrolyte solution is filled with in battery.Form whole polymer lithium electricity charge and discharge cycles system.The negative material of polymer lithium electricity is graphite, conductive agent (acetylene black), binding agent (SBR) and collector (Copper Foil).But due to negative material mainly graphite be attached on Copper Foil, in order to increase conductivity between graphite and Copper Foil and adhesive force, conductive agent and bonding agent is added between graphite and Copper Foil, this reduces the energy storage density of lithium battery, just form larger contact resistance and thermal resistance between graphite and Copper Foil simultaneously, in battery use procedure, negative pole will be made to generate heat, the materials such as graphite come off from Copper Foil, affect the performance and used life of polymer lithium electricity.Negative pole falls material and fever phenomenon is one of main existing problems of polymer lithium electricity, is also problem demanding prompt solution in polymer lithium electricity application process.
Graphene is a kind of new material of the single layer structure shape structure be made up of carbon atom.Be a kind ofly form with sp2 hybridized orbit the flat film that hexangle type is honeycomb lattice by carbon atom, only have the two-dimensional material of a carbon atom thickness.Graphene is thin, the hardest nano material in known world, and it is almost completely transparent, only absorbs the light of 2.3%; Conductive coefficient is up to 5300 W/mK, and higher than carbon nano-tube and diamond, under normal temperature, its electron mobility is more than 15000 cm
2/ Vs, again than CNT (carbon nano-tube) or silicon wafer height, and resistivity only about 10
-8Ω m, than copper or silver lower, be the material that world resistivity is minimum.Because its resistivity is extremely low, the speed of electron transfer is exceedingly fast, and is best face conductor material, the excellent conduction of graphene film and heat conductivility are applied in polymer lithium cell negative pole, is one of effective ways solving current polymer lithium cell negative pole problem.
Summary of the invention
Material is fallen and the larger problem of contact resistance between graphite and collector in order to overcome existing polymer lithium cell negative pole, the utility model provides a kind of copper-base graphite alkene polymer lithium battery cathode structure, its objective is that to utilize the affinity of Graphene and negative pole graphite dielectric substrate strong, Graphene deposition growing is on copper foil of affluxion body simultaneously, to strengthen the conductivity between graphite and collector, reduce the contact resistance of graphite and Copper Foil, reach the electric energy density increasing lithium battery and the effect increasing the service life reduction battery volume.
The utility model solves the technical scheme that its technical problem adopts: a kind of copper-base graphite alkene polymer lithium battery cathode structure, comprising: negative pole graphite dielectric substrate, graphene film layer, Copper Foil.The negative copper foil of affluxion body of polymer lithium electricity grows deposited graphite alkene thin layer, graphene film skin attachment graphite dielectric substrate.
Described negative pole graphite dielectric substrate, is characterized in that: negative pole graphite dispersion, in anolyte slip, makes graphite and firm the combining of graphene film layer by coating, oven dry and a kind of jade pressure.
Described graphene film layer, is characterized in that: graphene film layer deposition growing, in the both sides of negative copper foil of affluxion body, is firmly combined with chemical bond between Graphene with Copper Foil, and the number of plies of graphene film layer is 2-10 layer.
The beneficial effects of the utility model: the utility model adopts graphene film layer as the conductive layer between negative pole graphite dielectric substrate and afflux pole Copper Foil, add the conductive capability of conductive layer, improve the energy density of lithium battery, and graphene film layer and graphite and Copper Foil all chemical bond be firmly combined, reduce the contact resistance between graphite and Copper Foil and thermal resistance, graphene film layer also has good heat conductivility, rapidly the heat that negative pole produces can be derived, reduce because variations in temperature causes negative pole to fall material, add the service life cycle of polymer lithium electricity.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is a kind of copper-base graphite alkene polymer of the utility model lithium battery cathode structure schematic diagram
In figure: 1, negative pole graphite dielectric substrate, 2, graphene film layer, 3, Copper Foil.
Embodiment
Be described further the utility model referring to Fig. 1, a kind of copper-base graphite alkene polymer lithium battery cathode structure, comprising: negative pole graphite dielectric substrate 1, graphene film layer 2, Copper Foil 3 in conjunction with the embodiments.Growing graphene thin layer 2 on the negative copper foil of affluxion body 3 of polymer lithium electricity, graphene film 2 skin attachment graphite dielectric substrate 1.
Described negative pole graphite dielectric substrate, is characterized in that: negative pole graphite dispersion, in anolyte slip, makes graphite and firm the combining of graphene film layer 2 by coating, oven dry and a kind of jade pressure.
Described graphene film layer, is characterized in that: graphene film layer 2 is grown on the both sides of negative copper foil of affluxion body 3, is firmly combined between Graphene with Copper Foil 3 with chemical bond.The number of plies of graphene film layer 3 is 2-10 layer.
Specific embodiment
The preparation that graphene film layer 2 grows on Copper Foil 3: by chemical vapor subsidence style in certain space, use the carbonaceous gass such as methane as carbon source, carry out Graphene at 800-1250 DEG C to grow on Copper Foil 3, concrete steps are as follows, step one: Copper Foil 3 surface preparation, at 500-1000 DEG C with make under passing into high pure nitrogen situation Copper Foil 3 surface produce suitable carbon potential point, the time is 10-30 minute; Step 2: the Copper Foil 3 producing carbon potential point is cooled to 100-200 DEG C, cuts off source nitrogen; Step 3: the Copper Foil 3 producing carbon potential point is warming up to 900-1200 DEG C again, and pass into the carbonaceous gass such as methane, the carbonaceous gass such as methane are at high temperature decomposed, release carbon atom, time is 30-120 minute, at leisure growing graphene layer 2 on surfaces of the copper foil; Step 4: slow cooling is to room temperature, and take out the Copper Foil 3 that superficial growth has graphene layer 2, what graphene film layer 2 was firm is attached on Copper Foil 3.Step 5: the Graphene Copper Foil prepared is positioned on coating machine, carries out negative pole graphite electrolyte 1 slip and carries out being coated with, drying, and then the negative plate of drying is carried out a kind of jade crush-cutting sheet, the negative pole be sized as poly-lithium battery is for subsequent use.
Above-described embodiment just illustrates technical conceive of the present utility model and feature, its objective is and those of ordinary skill in the art can be understood feature of the present utility model and implement according to this, can not limit protection range of the present utility model with this.Every equivalence carried out according to the essence of the utility model content changes or modifies, and all should be encompassed in protection range of the present utility model.
Claims (2)
1. a copper-base graphite alkene polymer lithium battery cathode structure, comprising: negative pole graphite dielectric substrate, graphene film layer, Copper Foil; It is characterized in that: deposition growing graphene film layer on the negative copper foil of affluxion body of polymer lithium electricity, graphene film skin attachment graphite dielectric substrate.
2. a kind of copper-base graphite alkene polymer lithium battery cathode structure according to claim 1, it is characterized in that: graphene film layer deposition growing is in the both sides of negative copper foil of affluxion body, firmly be combined with chemical bond between Graphene with Copper Foil, the number of plies of graphene film layer is 2-10 layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420730560.8U CN204333111U (en) | 2014-11-30 | 2014-11-30 | A kind of copper-base graphite alkene polymer lithium battery cathode structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420730560.8U CN204333111U (en) | 2014-11-30 | 2014-11-30 | A kind of copper-base graphite alkene polymer lithium battery cathode structure |
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| CN204333111U true CN204333111U (en) | 2015-05-13 |
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| CN201420730560.8U Expired - Fee Related CN204333111U (en) | 2014-11-30 | 2014-11-30 | A kind of copper-base graphite alkene polymer lithium battery cathode structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538582A (en) * | 2014-11-30 | 2015-04-22 | 王干 | Copper-based grapehne polymer lithium battery negative electrode structure and production method thereof |
| CN104934642A (en) * | 2015-06-30 | 2015-09-23 | 中航锂电（洛阳）有限公司 | Lithium ion battery core and lithium ion battery |
| CN107505573A (en) * | 2017-07-28 | 2017-12-22 | 郑州比克电池有限公司 | A kind of method for differentiating lithium battery interior negative plate and dropping off |
| CN111048789A (en) * | 2019-12-26 | 2020-04-21 | 珠海冠宇电池有限公司 | Current collector and preparation method and application thereof |
-
2014
- 2014-11-30 CN CN201420730560.8U patent/CN204333111U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538582A (en) * | 2014-11-30 | 2015-04-22 | 王干 | Copper-based grapehne polymer lithium battery negative electrode structure and production method thereof |
| CN104934642A (en) * | 2015-06-30 | 2015-09-23 | 中航锂电（洛阳）有限公司 | Lithium ion battery core and lithium ion battery |
| CN104934642B (en) * | 2015-06-30 | 2017-08-04 | 中航锂电（江苏）有限公司 | Lithium ion battery cell and lithium ion battery |
| CN107505573A (en) * | 2017-07-28 | 2017-12-22 | 郑州比克电池有限公司 | A kind of method for differentiating lithium battery interior negative plate and dropping off |
| CN111048789A (en) * | 2019-12-26 | 2020-04-21 | 珠海冠宇电池有限公司 | Current collector and preparation method and application thereof |
| CN111048789B (en) * | 2019-12-26 | 2023-01-24 | 珠海冠宇电池股份有限公司 | Current collector and preparation method and application thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20171130 |
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| CF01 | Termination of patent right due to non-payment of annual fee |