CN106207117A - A kind of preparation method of nanometer Cobalt difluoride ./C positive electrode material - Google Patents
A kind of preparation method of nanometer Cobalt difluoride ./C positive electrode material Download PDFInfo
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- CN106207117A CN106207117A CN201610579407.3A CN201610579407A CN106207117A CN 106207117 A CN106207117 A CN 106207117A CN 201610579407 A CN201610579407 A CN 201610579407A CN 106207117 A CN106207117 A CN 106207117A
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- nanometer cobalt
- difluoride
- cobalt difluoride
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- 229910021582 Cobalt(II) fluoride Inorganic materials 0.000 title claims abstract description 53
- YCYBZKSMUPTWEE-UHFFFAOYSA-L cobalt(ii) fluoride Chemical compound F[Co]F YCYBZKSMUPTWEE-UHFFFAOYSA-L 0.000 title claims abstract description 49
- 239000007774 positive electrode material Substances 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000000227 grinding Methods 0.000 claims abstract description 12
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 9
- 239000004809 Teflon Substances 0.000 claims abstract description 8
- 229920006362 Teflon® Polymers 0.000 claims abstract description 8
- MULYSYXKGICWJF-UHFFFAOYSA-L cobalt(2+);oxalate Chemical compound [Co+2].[O-]C(=O)C([O-])=O MULYSYXKGICWJF-UHFFFAOYSA-L 0.000 claims abstract description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000009826 distribution Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229950000845 politef Drugs 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 16
- 239000000843 powder Substances 0.000 abstract description 11
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 10
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 10
- 239000003610 charcoal Substances 0.000 abstract description 5
- 239000008187 granular material Substances 0.000 abstract description 3
- FZGIHSNZYGFUGM-UHFFFAOYSA-L iron(ii) fluoride Chemical compound [F-].[F-].[Fe+2] FZGIHSNZYGFUGM-UHFFFAOYSA-L 0.000 abstract description 3
- 230000014759 maintenance of location Effects 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 abstract description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 239000008240 homogeneous mixture Substances 0.000 abstract 1
- 238000001308 synthesis method Methods 0.000 description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 10
- 229910052786 argon Inorganic materials 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 2
- 229910052493 LiFePO4 Inorganic materials 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000006230 acetylene black Substances 0.000 description 2
- 239000010405 anode material Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000975 co-precipitation Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001512 metal fluoride Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910032387 LiCoO2 Inorganic materials 0.000 description 1
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 1
- 229910001290 LiPF6 Inorganic materials 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/582—Halogenides
-
- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Nanotechnology (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The preparation method of the open a kind of nanometer Cobalt difluoride ./C positive electrode material of the present invention, belongs to technical field of lithium ion；The powdery polytetrafluoroethylene teflon of a certain amount of cobalt oxalate and excess is sufficiently mixed grinding by the method for the invention, homogeneous mixture is loaded alumina crucible, roasting under ar gas environment；Its sintering temperature is 500 ~ 650 DEG C, and holding temperature is 1 ~ 3h.After roasting completes, furnace cooling, to room temperature, obtains product of roasting and is Cobalt difluoride ./C；Product is taken out, after grinding, obtains tiny nanometer Cobalt difluoride ./C powder.Nanometer Cobalt difluoride ./C that the method for the invention prepares has that granularity is little, uniform, charcoal is closely coated with the advantages such as ferrous fluoride, and the temperature retention time in roasting process is shorter, it is ensured that granule is the most tiny, it is to avoid it is grown up.
Description
Technical field
The present invention relates to the preparation method of a kind of nanometer Cobalt difluoride ./C positive electrode material, belong to technical field of lithium ion.
Background technology
Along with social economy is growing and the quick growth of population, energy and environment problem has become as 21 generation
Two Tough questions faced by discipline is necessary, it is hot that the exploitation renewable new forms of energy of cleaning have become as the great research in the world today
Point.Electrochmical power source, especially secondary power supply, can realize chemical energy and the mutual reforming unit of electric energy as one, be rationally to have
Effect utilizes the Primary Component of the energy, is one of important means solving energy problem at present.At lead-acid battery, nickel-cadmium cell, nickel
In numerous series battery such as hydrogen battery, lithium rechargeable battery is with its high reversible capacity, high voltage, high cycle performance and high-energy
The performance that density etc. are superior becomes battery research and development and the focus of application in the world today.It is referred to as the leading chemical-electrical in 2l century
Source, its application constantly expands.But lithium ion battery industry competition is the fiercest, find high power capacity, the Novel electric of low cost
Pole material is the powerful measure reducing battery cost further, enhancing the competitiveness.Metal fluoride is that the most promising class is high
Capacity novel anode material.
The theoretical work voltage that metal fluoride is the highest, and energy storage side based on reversible chemical conversion reaction
Formula, its capacity released is significantly larger than the Lithium-ion embeding on tradition outline/deintercalation reaction so that it is have higher electric discharge specific volume
Amount, is LiCoO2 、LiMn 2 O 4 Deng tradition positive electrode several times.Relative to tradition positive electrode (LiCoO 2 、
LiFePO4 Deng) for, CoF2There is less relative molecular mass, so its theoretical specific capacity is bigger.Additionally, CoF2Have
Aboundresources, with low cost, environmental friendliness, specific capacity high, therefore be considered as great researching value and application prospect
A new generation's anode material for lithium-ion batteries.
At present to CoF2 Preparation mainly use traditional coprecipitation to be prepared into presoma, then sintering obtains under argon gas
, this complex process, in preparation process, influence factor is more, and can be to environment, and specific discharge capacity is relatively low.This
Bright for current technology problem, it is proposed that a kind of technique is simple, low cost, product nano Cobalt difluoride ./C granularity is little, uniform, charcoal
Closely it is coated with the process of ferrous fluoride.
Summary of the invention
It is an object of the invention to provide the preparation method of a kind of nanometer Cobalt difluoride ./C positive electrode material, specifically include following step
Rapid:
(1) by cobalt oxalate and powdery polytetrafluoroethylene teflon mix homogeneously, it is subsequently placed under ar gas environment and is rapidly heated to 500 ~ 650
DEG C, insulation is 1 ~ 3h, and after roasting completes, furnace cooling is to room temperature；
(2) nanometer Cobalt difluoride ./C positive electrode material (charcoal is closely coated with Cobalt difluoride .) is obtained after taking out product grinding distribution.
Preferably, the powdery polytetrafluoroethylene teflon excess added in step of the present invention (1), the politef excess of addition
10 ~ 30%.
Preferably, in step of the present invention (2), during roasting, heating rate is 7 ~ 10 DEG C/min.
Electrochemical property test: the nanometer Cobalt difluoride ./C powder that will obtain in step (2), acetylene black, Kynoar
(PVDF) it is assembled into CR2025 button cell for the ratio mixed grinding of 8:1:1 in mass ratio, after standing 24h, tests its charge and discharge
Electrical property.
Beneficial effects of the present invention: the present invention is that fabricated in situ obtains directly by one-step method roasting under ar gas environment
Nanometer Cobalt difluoride ./C；Present invention process is simple compared with current nanometer Cobalt difluoride ./C preparation method, low cost；Product nano fluorine
Change cobalt/C and have that granularity is little, uniform, charcoal is closely coated with the advantages such as ferrous fluoride；Temperature retention time in roasting process is shorter, it is ensured that
Granule is the most tiny, avoids it to grow up.
Nanometer Cobalt difluoride ./C positive electrode material is used for preparing lithium ion battery, relative to tradition positive electrode (LiCoO 2 、
LiFePO4 Deng) for, chemical property increases.And the nanometer Cobalt difluoride. that traditional coprecipitation is prepared into, discharge specific volume
Measuring relatively low, and the nanometer Cobalt difluoride. of one-step synthesis method has been coated with one layer of carbon-coating, the conductive network that carbon-coating is formed further increases
The overall conductivity of material, makes the increase of battery discharge specific capacity, cycle performance improve.
Accompanying drawing explanation
Fig. 1 is the XRD figure sheet of nanometer Cobalt difluoride ./C that present example 1 one-step synthesis method obtains.
Fig. 2 is the transmission electron microscope picture of nanometer Cobalt difluoride ./C that present example 1 one-step synthesis method obtains.
Fig. 3 be nanometer Cobalt difluoride ./C lithium of preparing of the nanometer Cobalt difluoride ./C of present example 2 one-step synthesis method from
The charging and discharging curve of sub-battery.
Detailed description of the invention
With specific embodiment, the present invention is described in further detail below in conjunction with the accompanying drawings, but protection scope of the present invention is also
It is not limited to described content.
Embodiment 1
By the method for one-step synthesis method nanometer Cobalt difluoride ./C described in the present embodiment, specifically include following steps:
(1) powdery polytetrafluoroethylene teflon of a certain amount of cobalt oxalate and excess 10% is sufficiently mixed grinding, is subsequently placed in argon
Being rapidly heated to 650 DEG C with the heating rate of 8 DEG C/min under environment, be incubated as 1h, after roasting completes, furnace cooling is to room temperature.
(2) product is taken out, after grinding distribution, obtain tiny nanometer Cobalt difluoride ./C positive electrode material powder.
Electrochemical property test:
1. by the nanometer Cobalt difluoride ./C powder obtained in step (2), acetylene black, Kynoar (PVDF) it is in mass ratio
The ratio of 8:1:1 weighs and is placed in agate mortar, drips appropriate METHYLPYRROLIDONE (NMP) and grinds uniformly；It is coated with
Overlaying on Al paper tinsel, being coated in the thickness on Al paper tinsel is 0.15mm, then is placed in 110 DEG C of dry 24h in vacuum drying oven, then by pole
Sheet takes out, as positive pole.
2. metal lithium sheet is as negative pole and reference electrode, and microporous polypropylene membrane is barrier film, with 1mol/LiPF6 +EC/DMC/
EMC is electrolyte, in full argon, the moisture glove box less than 2ppm, is assembled into CR2025 rustless steel button electricity
Pond；Its charge-discharge performance is tested after standing 24h.
The XRD figure sheet of nanometer Cobalt difluoride ./C that the present embodiment one-step synthesis method obtains is as it is shown in figure 1, close as seen from the figure
One-tenth product is CoF2。
The nanometer Cobalt difluoride. that the present embodiment one-step synthesis method obtains/C transmission electron microscope picture is as in figure 2 it is shown, can be seen by figure
Go out charcoal and be closely coated with Cobalt difluoride. granule.
Nanometer Cobalt difluoride ./C lithium ion battery that the nanometer Cobalt difluoride ./C of the present embodiment one-step synthesis method prepares is
Big specific discharge capacity is 289.645mA hg-1。
Embodiment 2
By the method for one-step synthesis method nanometer Cobalt difluoride ./C described in the present embodiment, specifically include following steps:
(1) powdery polytetrafluoroethylene teflon of a certain amount of cobalt oxalate and excess 30% is sufficiently mixed grinding, is subsequently placed in argon
Being rapidly heated to 550 DEG C with the heating rate of 10 DEG C/min under environment, be incubated as 2h, after roasting completes, furnace cooling is to room
Temperature.
(2) product is taken out, after grinding distribution, obtain tiny nanometer Cobalt difluoride ./C positive electrode material powder.
Electrochemical property test: the nanometer Cobalt difluoride ./C powder that will obtain in step (2), according to method described in example 1
It is assembled into CR2025 button cell, after standing 24h, tests its charge-discharge performance.
Nanometer Cobalt difluoride ./C lithium ion battery that the nanometer Cobalt difluoride ./C of the present embodiment one-step synthesis method prepares
Charging and discharging curve as it is shown on figure 3, as seen from the figure battery maximum specific discharge capacity be 173.966mA h g-1。
Embodiment 3
By the method for one-step synthesis method nanometer Cobalt difluoride ./C described in the present embodiment, specifically include following steps:
(1) powdery polytetrafluoroethylene teflon of a certain amount of cobalt oxalate and excess 20% is sufficiently mixed grinding, is subsequently placed in argon
Being rapidly heated to 500 DEG C with the heating rate of 7 DEG C/min under environment, be incubated as 3h, after roasting completes, furnace cooling is to room temperature.
(2) product is taken out, after grinding distribution, obtain tiny nanometer Cobalt difluoride ./C positive electrode material powder.
Electrochemical property test: the nanometer Cobalt difluoride ./C powder that will obtain in step (2), method group as described in example 1
Dress up CR2025 button cell, after standing 24h, test its charge-discharge performance.
Nanometer Cobalt difluoride ./C lithium ion battery that the nanometer Cobalt difluoride ./C of the present embodiment one-step synthesis method prepares is
Big specific discharge capacity is 225.393mA h g-1。
Embodiment 4
By the method for one-step synthesis method nanometer Cobalt difluoride ./C described in the present embodiment, specifically include following steps:
(1) by the stoichiometric proportion that mass ratio is 10:2.75 of cobalt oxalate and politef by poly-to cobalt oxalate and powder four
Fluorothene mix homogeneously, is subsequently placed under ar gas environment the heating rate with 9 DEG C/min and is quickly rapidly heated to 550 DEG C, insulation
For 1h, after roasting completes, furnace cooling is to room temperature；
(2) product is taken out, after grinding distribution, obtain tiny nanometer Cobalt difluoride ./C positive electrode material powder.
Electrochemical property test: the nanometer Cobalt difluoride ./C powder that will obtain in step (2), method group as described in example 1
Dress up CR2025 button cell, after standing 24h, test its charge-discharge performance.
Nanometer Cobalt difluoride ./C lithium ion battery that the nanometer Cobalt difluoride ./C of the present embodiment one-step synthesis method prepares is
Big specific discharge capacity is 143.994mA h g-1。
Product nano Cobalt difluoride ./C is had a certain impact by the content of politef, the oxalic acid stoichiometrically prepared
Cobalt and politef are for the proportioning of politef excess, and the impurity in product is more, causes filling of its battery
Discharge performance is poor.
Claims (3)
1. the preparation method of nanometer Cobalt difluoride ./C positive electrode material, it is characterised in that specifically include following steps:
(1) by cobalt oxalate and powdery polytetrafluoroethylene teflon mix homogeneously, it is subsequently placed under ar gas environment and is rapidly heated to 500 ~ 650
DEG C, insulation is 1 ~ 3h, and after roasting completes, furnace cooling is to room temperature；
(2) nanometer Cobalt difluoride ./C positive electrode material is obtained after taking out product grinding distribution.
The preparation method of nanometer Cobalt difluoride ./C positive electrode material the most according to claim 1, it is characterised in that: step adds in (1)
The powdery polytetrafluoroethylene teflon excess entered, the politef excess 10 ~ 30% of addition.
The preparation method of nanometer Cobalt difluoride ./C positive electrode material the most according to claim 1, it is characterised in that: roasting in step (2)
During burning, heating rate is 7 ~ 10 DEG C/min.
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| CN108270003A (en) * | 2018-01-05 | 2018-07-10 | 昆明理工大学 | A kind of liquid phase method synthesizes FeF3The method of/CNTs positive electrodes |
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| YANLI ZHANG ET AL.: "A one pot approach towards FeF2–carbon core–shell composite and its application in lithium ion batteries", 《JOURNAL OF ALLOYS AND COMPOUNDS》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108270003A (en) * | 2018-01-05 | 2018-07-10 | 昆明理工大学 | A kind of liquid phase method synthesizes FeF3The method of/CNTs positive electrodes |
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