CN106206047A - Hard carbon/graphene composite material and preparation method thereof and lithium-ion capacitor and preparation method thereof - Google Patents
Hard carbon/graphene composite material and preparation method thereof and lithium-ion capacitor and preparation method thereof Download PDFInfo
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- CN106206047A CN106206047A CN201610768961.6A CN201610768961A CN106206047A CN 106206047 A CN106206047 A CN 106206047A CN 201610768961 A CN201610768961 A CN 201610768961A CN 106206047 A CN106206047 A CN 106206047A
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- graphene composite
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 229910021385 hard carbon Inorganic materials 0.000 title claims abstract description 72
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 71
- 239000003990 capacitor Substances 0.000 title claims abstract description 60
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000002131 composite material Substances 0.000 title claims abstract description 53
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 238000000498 ball milling Methods 0.000 claims description 10
- 239000006258 conductive agent Substances 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- 239000010439 graphite Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 239000003792 electrolyte Substances 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 5
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 5
- 238000003475 lamination Methods 0.000 claims description 5
- 239000007800 oxidant agent Substances 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 5
- 150000001336 alkenes Chemical class 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 229910052754 neon Inorganic materials 0.000 claims description 3
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims description 2
- 229910001290 LiPF6 Inorganic materials 0.000 claims 1
- 239000011258 core-shell material Substances 0.000 abstract description 12
- 239000002033 PVDF binder Substances 0.000 description 7
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 229910013872 LiPF Inorganic materials 0.000 description 4
- 101150058243 Lipf gene Proteins 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- -1 graphite Alkene Chemical class 0.000 description 4
- 239000005030 aluminium foil Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052756 noble gas Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920003026 Acene Polymers 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/04—Hybrid capacitors
- H01G11/06—Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/24—Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/38—Carbon pastes or blends; Binders or additives therein
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/50—Electrodes characterised by their material specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The present invention relates to hard carbon/graphene composite material and preparation method thereof and lithium-ion capacitor and preparation method thereof.According to the hard carbon/graphene composite material of the present invention, including the raw material of following weight percentage: Graphene 1%～40% and hard carbon 60%～99%.Hard carbon/graphene composite material according to the present invention possesses good electric conductivity, excellent mechanical performance, higher power density and volumetric capacitance, and longer service life, can be used as the negative active core-shell material of lithium-ion capacitor.
Description
Technical field
The present invention relates to electrochemical field, relate generally to hard carbon/graphene composite material and preparation method thereof and lithium ion
Capacitor and preparation method thereof.
Background technology
Lithium-ion capacitor negative pole in design have employed the principle of double layer capacitor, with the addition of lithium at positive pole again simultaneously
Ion, thus improve the energy density of capacitor.Electronics corporation of Asahi Chemical Industry of Japan and FDK company the most once developed at electrolyte
The capacitor of middle employing oxidate for lithium, but all it is not carried out commercialization.Favourable turn occurred in 2005, and Fuji Heavy Industries company is open
The manufacturing technology of lithium-ion capacitor: capacitor anode uses polyacene class material, and the substantial amounts of lithium ion that adulterates wherein,
The negative material of capacitor the most still continues to use conventional activated carbon.Hereafter, multiple commercial vendors utilizes such technology, produces and both had
The high output of double layer capacitor, long-life characteristics, be provided that again the capacitor of higher energy density simultaneously.At the end of 2008, the rising sun
Chemical conversion electronics, ACT (senior capacitor technology), NEC, JM Energy, Deng Duo company of TAIYO YUDAN are all at exploitation lithium-ion electric
Container products, wherein the product of ACT and JM Energy two company has been enter into volume production.
What the energy density of lithium-ion capacitor was improved main reason is that the voltage of capacitor unit and positive pole are quiet
The increase of capacitance.The voltage of traditional capacitor is usually 2.5～3.0V, and just can bring up to after with the addition of lithium ion
4.0V.Compared with the ordinary capacitor that negative pole uses identical material, the unit energy of lithium-ion capacitor can improve 3.5 times.So
And owing to positive pole uses the insert material of hard carbon or graphite-like as active substance, charge-discharge velocity, temperature characterisitic and length
It is more weak that effect cycle characteristics compares double layer capacitor, in order to improve the overall characteristic of lithium-ion capacitor, needs positive electrode
It is optimized.
Summary of the invention
It is an object of the present invention to propose a kind of hard carbon/Graphene possessing higher power density and specific capacity multiple
Condensation material.
Hard carbon/graphene composite material according to embodiments of the present invention, including the raw material of following weight percentage: graphite
Alkene 1%～40% and hard carbon 60%～99%.
Hard carbon/graphene composite material according to embodiments of the present invention possesses good electric conductivity, excellent mechanical performance,
Higher power density and volumetric capacitance, and longer service life, can be used as the negative electrode active material of lithium-ion capacitor
Material.
It addition, hard carbon/graphene composite material according to the above embodiment of the present invention, it is also possible to there is following additional skill
Art feature:
Further, the specific surface area of the Graphene in described hard carbon/graphene composite material is 200m2/ g～1500m2/
g。
Further object is that the preparation method of protection hard carbon/graphene composite material.
The preparation method of the hard carbon/graphene composite material according to the present invention, comprises the steps: hard carbon and oxidation stone
Ink alkene mixes according to mass ratio for (1:4)～(2:3) and grinds, to obtain the mixture of hard carbon and graphene oxide；By described
Mixture is heated to 500 DEG C～1500 DEG C of temperature under atmosphere of inert gases is protected, and reacts 1h～24h, to obtain hard carbon graphite
Alkene composite.
Further, described graphene oxide is to use airtight oxidizing process to be reacted with graphite by strong oxidizer to prepare
's.
Further, one or more during described noble gas includes nitrogen, argon, helium and neon.
Further, the method for described grinding is ball milling, and the rotating speed of described ball milling is 300r/min～1500r/min.
Further, described hard carbon is 3:7 with the mass ratio of graphene oxide.
Further object is that a kind of lithium-ion capacitor of protection.
According to a kind of lithium-ion capacitor of the present invention, the negative pole of described lithium-ion capacitor is above-mentioned hard carbon graphite
Alkene composite.
Further object is that the preparation method protecting a kind of lithium-ion capacitor.
The preparation method of the lithium-ion capacitor according to the present invention, comprises the steps: to be combined described hard carbon/Graphene
Material and conductive agent and Kynoar are after 18:1:1 mixes according to mass ratio, are dried, then at a temperature of 95 DEG C～105 DEG C
Roll-in under 10MPa～15MPa pressure, to obtain the negative plate of lithium-ion capacitor；By activated carbon, conductive agent and polyvinylidene fluoride
After alkene is 17:1:1 mixing according to weight ratio, it is dried at a temperature of 95 DEG C～105 DEG C, then at 10MPa～15MPa pressure lower roll
Pressure, to obtain the positive plate of lithium-ion capacitor；By the positive plate of described lithium-ion capacitor, barrier film and described lithium-ion capacitance
The negative plate of device lamination successively, is assembled into battery core, then seals described battery core with the battery container including liquid injection port, then passes through
Described liquid injection port injects the LiPF of 0.8mol/L～1.2mol/L in described battery container6/ dimethyl carbonate electrolyte seals
Described liquid injection port, to obtain lithium-ion capacitor.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the SEM Electronic Speculum figure of gained of the present invention hard carbon/graphene composite material；
Fig. 2 is the partial enlarged drawing of Fig. 1.
Detailed description of the invention
Embodiments of the invention are described below in detail.The following examples are exemplary, it is intended to be used for explaining the present invention,
And be not considered as limiting the invention.
Embodiment one
A kind of hard carbon/graphene composite material, including the raw material of following weight percentage: Graphene 20% and hard carbon
80%.
Hard carbon/graphene composite material according to embodiment one possesses good electric conductivity, excellent mechanical performance, higher
Power density and volumetric capacitance, and longer service life, can be used as the negative active core-shell material of lithium-ion capacitor.
The preparation method of above-mentioned hard carbon/graphene composite material, comprises the following steps:
Taking graphene oxide to mix with hard carbon 1:4 in mass ratio, ball milling 5h (rotating speed is 1500r/min), ball milling is placed on
By 900 DEG C of reaction 20h in the Muffle furnace of noble gas argon shield, obtain hard carbon/graphene composite material.Wherein, described oxygen
Functionalized graphene is used airtight oxidizing process to be reacted with graphite by strong oxidizer and prepares.As it is shown in figure 1, hard carbon and graphite
Alkene mixes the most uniformly, so, and beneficially fast charging and discharging.
The preparation method technological process that embodiment one provides is simple, and the response time is short.The lithium-ion capacitance that the present invention provides
Device, using hard carbon/graphene composite material as negative active core-shell material.
The present embodiment gained hard carbon/graphene composite material is assembled into lithium-ion capacitor as negative active core-shell material:
Weigh 9.0g hard carbon/graphene composite material, 0.5g conductive agent SP and 0.5g PVDF, be sufficiently stirred for making mix homogeneously
Slurry.Then being scratched on the aluminium foil crossed through ethanol purge, under the vacuum of 0.01MPa, 100 DEG C are dried to constant weight, and
It is pressed into hard carbon/graphene composite material electrode in 10MPa～15MPa pressure lower roll, and is cut into negative plate.Weigh 8.5g activity
Carbon, 0.5g conductive agent SP and 0.5g PVDF, with the method preparing negative plate, make positive plate.By positive plate, barrier film, negative plate
Stack of laminations dresses up battery core in order, then by battery housing seal battery core, injects in battery container toward by liquid injection port subsequently
The LiPF of 1mol/L6/ dimethyl carbonate electrolyte, seals liquid injection port, obtains lithium-ion capacitor.
The lithium-ion capacitor of above-mentioned preparation is carried out charge discharge test under the electric current density of 0.1C, records this
The energy density of embodiment lithium-ion capacitor is 36Wh/kg.
According to the lithium-ion capacitor of embodiment one preparation, using hard carbon/graphene composite material as positive electrode active materials,
Described capacitor has higher power density and volumetric capacitance, and longer service life.
Embodiment two
A kind of hard carbon/graphene composite material, including the raw material of following weight percentage: Graphene 40% and hard carbon
60%.
Hard carbon/graphene composite material according to embodiment two possesses good electric conductivity, excellent mechanical performance, higher
Power density and volumetric capacitance, and longer service life, can be used as the negative active core-shell material of lithium-ion capacitor.
The preparation method of above-mentioned hard carbon/graphene composite material, comprises the following steps:
Taking graphene oxide to mix with hard carbon 2:3 in mass ratio, ball milling 1h (rotating speed is 1500r/min), ball milling is placed on
In the Muffle furnace protected by inert nitrogen gas, 800 DEG C of reaction 10h, obtain hard carbon/graphene composite material.Wherein, described oxygen
Functionalized graphene is used airtight oxidizing process to be reacted with graphite by strong oxidizer and prepares.
The preparation method technological process that embodiment two provides is simple, and the response time is short.The lithium-ion capacitance that the present invention provides
Device, using hard carbon/graphene composite material as negative active core-shell material.
The present embodiment gained hard carbon/graphene composite material is assembled into lithium-ion capacitor as negative active core-shell material:
Weigh 9.0g hard carbon/graphene composite material, 0.5g conductive agent SP and 0.5g PVDF, be sufficiently stirred for making mix homogeneously
Slurry.Then being scratched on the aluminium foil crossed through ethanol purge, under the vacuum of 0.01MPa, 100 DEG C are dried to constant weight, and
It is pressed into hard carbon/graphene composite material electrode in 10MPa～15MPa pressure lower roll, and is cut into negative plate.Weigh 8.5g activity
Carbon, 0.5g conductive agent SP and 0.5g PVDF, with the method preparing negative plate, make positive plate.By positive plate, barrier film, negative plate
Stack of laminations dresses up battery core in order, then by battery housing seal battery core, injects in battery container toward by liquid injection port subsequently
The LiPF of 1mol/L6/ dimethyl carbonate electrolyte, seals liquid injection port, obtains lithium-ion capacitor.
The lithium-ion capacitor of above-mentioned preparation is carried out charge discharge test under the electric current density of 0.1C, records this
The energy density of embodiment lithium-ion capacitor is 26Wh/kg.
According to the lithium-ion capacitor of embodiment two preparation, using hard carbon/graphene composite material as negative active core-shell material,
Described capacitor has higher power density and volumetric capacitance, and longer service life.
Embodiment three
A kind of hard carbon/graphene composite material, including the raw material of following weight percentage: graphene oxide 30% is with hard
Carbon 70%.
Hard carbon/graphene composite material according to embodiment three possesses good electric conductivity, excellent mechanical performance, higher
Power density and volumetric capacitance, and longer service life, can be used as the negative active core-shell material of lithium-ion capacitor.
The preparation method of above-mentioned hard carbon/graphene composite material, comprises the following steps:
Taking graphene oxide to mix with hard carbon 3:7 in mass ratio, ball milling 10h (rotating speed is 300r/min), ball milling is placed on
In the Muffle furnace mixed gas protected by inert gas helium and neon, 900 DEG C of reaction 20h, obtain hard carbon/Graphene composite wood
Material.Wherein, the airtight oxidizing process of described graphene oxide employing is reacted with graphite by strong oxidizer and is prepared.
The preparation method technological process that embodiment three provides is simple, and the response time is short.The lithium-ion capacitance that the present invention provides
Device, using hard carbon/graphene composite material as negative active core-shell material.
The present embodiment gained hard carbon/graphene composite material is assembled into lithium-ion capacitor as negative active core-shell material:
Weigh 9.0g hard carbon/graphene composite material, 0.5g conductive agent SP and 0.5g PVDF, be sufficiently stirred for making mix homogeneously
Slurry.Then being scratched on the aluminium foil crossed through ethanol purge, under the vacuum of 0.01MPa, 100 DEG C are dried to constant weight, and
It is pressed into hard carbon/graphene composite material electrode in 10MPa～15MPa pressure lower roll, and is cut into negative plate.Weigh 8.5g activity
Carbon, 0.5g conductive agent SP and 0.5g PVDF, with the method preparing negative plate, make positive plate.By positive plate, barrier film, negative plate
Stack of laminations dresses up battery core in order, then by battery housing seal battery core, is injected in battery container by liquid injection port subsequently
The LiPF of 1mol/L6/ dimethyl carbonate electrolyte, seals liquid injection port, obtains lithium-ion capacitor.
The lithium-ion capacitor of above-mentioned preparation is carried out charge discharge test under the electric current density of 0.1C, records this
The energy density of embodiment lithium-ion capacitor is 28Wh/kg.
According to the lithium-ion capacitor of embodiment three preparation, using hard carbon/graphene composite material as negative active core-shell material,
Described capacitor has higher power density and volumetric capacitance, and longer service life.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
One or more embodiments or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.
Claims (9)
1. hard carbon/graphene composite material, it is characterised in that include the raw material of following weight percentage: Graphene 1%～
40% and hard carbon 60%～99%.
Hard carbon/graphene composite material the most according to claim 1, it is characterised in that described hard carbon/Graphene composite wood
The specific surface area of the Graphene in material is 200m2/ g～1500m2/g。
The preparation method of hard carbon/graphene composite material the most according to claim 1 and 2, it is characterised in that include as follows
Step:
Hard carbon is mixed and grinds according to mass ratio for (1:4)～(2:3) with graphene oxide, to obtain hard carbon and graphite oxide
The mixture of alkene；
Described mixture is heated under atmosphere of inert gases is protected 500 DEG C～1500 DEG C of temperature, reacts 1h～24h, with
To hard carbon/graphene composite material.
The preparation method of hard carbon/graphene composite material the most according to claim 3, it is characterised in that described oxidation stone
Ink alkene is used airtight oxidizing process to be reacted with graphite by strong oxidizer and prepares.
The preparation method of hard carbon/graphene composite material the most according to claim 3, it is characterised in that described indifferent gas
Body includes one or more in nitrogen, argon, helium and neon.
The preparation method of hard carbon/graphene composite material the most according to claim 3, it is characterised in that described grinding
Method is ball milling, and the rotating speed of described ball milling is 300r/min～1500r/min.
The preparation method of hard carbon/graphene composite material the most according to claim 3, it is characterised in that described hard carbon with
The mass ratio of graphene oxide is 3:7.
8. a lithium-ion capacitor, it is characterised in that the negative pole of described lithium-ion capacitor is described in claim 1 or 2
Hard carbon/graphene composite material.
The preparation method of lithium-ion capacitor the most according to claim 8, it is characterised in that comprise the steps:
It is after 18:1:1 mixes by described hard carbon/graphene composite material and conductive agent and Kynoar according to mass ratio,
Being dried at a temperature of 95 DEG C～105 DEG C, then roll-in under 10MPa～15MPa pressure, to obtain the negative pole of lithium-ion capacitor
Sheet；
After activated carbon, conductive agent and Kynoar are 17:1:1 mixing according to weight ratio, dry at a temperature of 95 DEG C～105 DEG C
Dry, then roll-in under 10MPa～15MPa pressure, to obtain the positive plate of lithium-ion capacitor；
By the negative plate lamination successively of the positive plate of described lithium-ion capacitor, barrier film and described lithium-ion capacitor, it is assembled into
Battery core, then seals described battery core, then by described liquid injection port to described battery container with the battery container including liquid injection port
In inject 0.8mol/L～1.2mol/L LiPF6/ dimethyl carbonate electrolyte seals described liquid injection port, to obtain lithium-ion electric
Container.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610768961.6A CN106206047A (en) | 2016-08-30 | 2016-08-30 | Hard carbon/graphene composite material and preparation method thereof and lithium-ion capacitor and preparation method thereof |
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| CN201610768961.6A CN106206047A (en) | 2016-08-30 | 2016-08-30 | Hard carbon/graphene composite material and preparation method thereof and lithium-ion capacitor and preparation method thereof |
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| CN106206047A true CN106206047A (en) | 2016-12-07 |
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|---|---|---|---|
| CN201610768961.6A Pending CN106206047A (en) | 2016-08-30 | 2016-08-30 | Hard carbon/graphene composite material and preparation method thereof and lithium-ion capacitor and preparation method thereof |
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Application publication date: 20161207 |