CN107611440A - A kind of bowl-type carbon material, it is prepared and point-line-surface three-phase composite electrocondution slurry - Google Patents
A kind of bowl-type carbon material, it is prepared and point-line-surface three-phase composite electrocondution slurry Download PDFInfo
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Abstract
The invention provides a kind of bowl-type carbon material, it is prepared and point-line-surface three-phase composite electrocondution slurry, the preparation of bowl-type carbon material includes (1), sequentially adds block copolymer F127 and dopamine hydrochloride in the mixed solution of deionized water and ethanol, then trimethylbenzene is instilled thereto, obtains mixed solution A；Ammoniacal liquor is added into the mixed solution A again under stirring condition, continues to stir, obtains mixed solution B；Use the mixed solution of deionized water and ethanol to wash the mixed solution B to remove block copolymer F127 again, after filtering, obtain poly-dopamine particle；(2) poly-dopamine even particulate dispersion, is subjected to hydro-thermal reaction after the mixed solution of deionized water and ethanol under air-proof condition；(3) hydro-thermal reaction products therefrom, is subjected to calcination processing under an inert atmosphere.Present invention also offers the point-line-surface three-phase composite electrocondution slurry comprising the bowl-type carbon material, the slurry is used as to the conductive agent of battery can effectively lift the performance of battery.
Description
Technical field
The present invention relates to a kind of bowl-type carbon material, it is prepared and point-line-surface three-phase composite electrocondution slurry, belongs to carbon material skill
Art field.
Background technology
Dopamine is a kind of high carbon containing biomolecule, and it is widely present in the shell top layer of biology, is that the mankind are sustainable
The carbon source material of (renewable) acquisition.Dopamine can aggregate into poly-dopamine ball under the conditions of certain pH, by poly-dopamine ball
Poly-dopamine carbon material can be obtained after carbonization treatment.Poly-dopamine carbon material is flourishing with its pore structure, and hydro-thermal is steady
It is qualitative excellent, cause concern in fields such as the surface modifications of catalysis material, membrane material and electrode material.
CNT (Carbon Nanotubes, CNTs) since 1991 by Japanese Electronic Speculum scholar Iijima find first with
Come, it has many abnormal mechanics, electricity and chemical properties, it is extensive to cause people as a kind of one-dimensional carbon nano material
Concern.In recent years, goed deep into CNT and nano materials research, its wide application prospect is also constantly shown
Come.CNTs electric conductivity and high length-diameter ratio determines that it is probably a kind of preferable conductive agent, with conventional conductive agent such as conductive carbon
Black grade is compared, and CNT has higher electronic conductivity, and institute's expense is relatively low, be advantageous to lifted battery capacity,
Improve the circulating battery longevity.However, because usual CNTs specific surface area is smaller, limit limited with the contact area of active material
Transfer of the electronics between active material and CNT, therefore its application as conductive agent in terms of lithium ion battery are made
Receive certain limitation.
Graphene has caused the very big emerging of domestic and international researcher as a kind of Novel Carbon Nanomaterials since self-discovery
Interest, graphene are " mono-layer graphite piece ", are the basic structural units for forming graphite；It is as one-dimensional (1D) and two-dimentional (2D) carbon
The representative of nano material, it was both had any different or was related with CNT, and the two has complementarity in structure and performance.From
From the point of view of in structure, CNT is the one-dimensional crystal structure of carbon material；Graphene is made up of single layer of carbon atom layer, is real meaning
On two dimensional crystal structure.CNT drawout just forms graphene, and graphene is rolled up just forming CNT；
From performance, graphene has the even more excellent performance that can be compared favourably with CNT, such as it has the electricity of superelevation
Transport factor, thermal conductivity, high carrier mobility, free electronics mobile space, high resiliency, high intensity etc.；In geometry
On, CNT and graphene can abstractively regard line, face as, and they are different from the conductive contact interface of electrode active material,
CNT can form complete three-dimensional conductive network structure as a kind of new carbon fiber shape conductive agent.With carbon nanometer
Pipe is the same, and the laminated structure of graphene determines that electronics can conduct in two-dimensional space, is also regarded as preferable conductive agent, so
And the limitation of its two-dimensional structure and high-specific surface area also result in it between active material can not as CNT structure
Build perfect three-dimensional conductive network.
Therefore it provides a kind of point-line-surface 3 D stereo material three-phase composite electrocondution slurry has become this area urgent need to resolve
Technical problem.
The content of the invention
In order to solve the shortcomings that above-mentioned and deficiency, it is an object of the invention to provide a kind of preparation side of bowl-type carbon material
Method.
The present invention also aims to provide the bowl-type carbon material being prepared by above-mentioned bowl-type carbon materials preparation method for material.
The present invention also aims to provide a kind of point-line-surface three-phase composite electrocondution slurry, it includes above-mentioned bowl-type carbon materials
Material.
The present invention also aims to provide the preparation method of above-mentioned point-line-surface three-phase composite electrocondution slurry.
The present invention also aims to provide application of the above-mentioned point-line-surface three-phase composite electrocondution slurry as battery conductive agent.
To reach above-mentioned purpose, the present invention provides a kind of preparation method of bowl-type carbon material, and it comprises the following steps：
(1) block copolymer F127 (activating agent) and dopamine hydrochloride, are sequentially added into the mixed of deionized water and ethanol
Close in solution, then instill trimethylbenzene thereto, obtain mixed solution A；Added again into the mixed solution A under stirring condition
Ammoniacal liquor, continue to stir, obtain mixed solution B；Use again the mixed solution of deionized water and ethanol wash the mixed solution B with except
Block copolymer F127 is removed, after filtering, obtains poly-dopamine particle；
(2), by the poly-dopamine even particulate dispersion after the mixed solution of deionized water and ethanol, in air-proof condition
Lower carry out hydro-thermal reaction；
(3) hydro-thermal reaction products therefrom, is subjected to calcination processing under an inert atmosphere, obtains the bowl-type carbon material.
According to specific embodiments of the present invention, in described preparation method, it is preferable that the trimethylbenzene is equal front three
Benzene.
According to specific embodiments of the present invention, in described preparation method, it is preferable that the dopamine hydrochloride, embedding
The mass ratio of the mixed solution of deionized water used and ethanol is in section copolymer F127, ammoniacal liquor, trimethylbenzene and mixed solution A
1:0.1-10:10-200:0.1-20:20-200。
According to specific embodiments of the present invention, in described preparation method, it is preferable that deionized water and ethanol it is water-soluble
In liquid, the volume ratio of deionized water and ethanol is 0.1-10:1；More preferably 0.8:1.
According to specific embodiments of the present invention, in described preparation method, the time for continuing stirring in step (1) is 1-
6h。
According to specific embodiments of the present invention, in described preparation method, the application is to washing deionized water and second
The dosage of the mixed solution of alcohol does not make specific requirement, and those skilled in the art can need rationally to set washing times according to operation
And the dosage of mixed solution, as long as ensureing that the purpose for removing block copolymer F127 can be realized.
According to specific embodiments of the present invention, in described preparation method, it is preferable that hydro-thermal is anti-described in step (2)
The temperature answered is 80-180 DEG C, reaction time 12-36h.
According to specific embodiments of the present invention, in described preparation method, it is preferable that described in step (3) at calcining
The temperature of reason is 300-1000 DEG C, calcination time 2-8h；
It is highly preferred that the temperature of the calcination processing is 500-1000 DEG C.
Wherein, the present invention does not make specific requirement to inert atmosphere used in step (3), and those skilled in the art can basis
Operation such as needs at the suitable inert atmosphere of factor reasonable selection, as long as ensureing that the purpose of the present invention can be realized, in this hair
In bright preferred embodiment, inert atmosphere used is nitrogen.
Present invention also offers the bowl-type carbon material that the preparation method by above-mentioned bowl-type carbon material is prepared.
Wherein, herein described bowl-type carbon material is mainly to be formed by the polymerization of dopamine hydrochloride, preparation process
Trimethylbenzene auxiliary material used can aid in the polymerization of dopamine hydrochloride；Therefore, in the application preparation process the selection of raw material and
The selection of the technological parameter of reaction can be to bowl-type carbon material formation produce substantial effect.
Present invention also offers a kind of point-line-surface three-phase composite electrocondution slurry, and it includes dispersate and dispersant, with described
The gross mass of dispersate is 100% meter, the dispersate include 10-80wt% bowl-type carbon material, 10-80wt% graphene with
And 10-80wt% other carbon materials；And the weight percentage sum of the bowl-type carbon material, graphene and other carbon materials
For 100%；
The dispersant is N-methyl pyrrolidones.
According to specific embodiments of the present invention, in described point-line-surface three-phase composite electrocondution slurry, it is preferable that it is described its
His carbon material includes the one or more in graphite, carbon black, porous carbon, CNT, fullerene, graphene, green coke and ripe Jiao
Combination.
According to specific embodiments of the present invention, in described point-line-surface three-phase composite electrocondution slurry, it is preferable that the stone
Black alkene is through supercritical CO2Graphene after shear treatment；
It is highly preferred that the temperature of the overcritical shear treatment is 40-60 DEG C, pressure 8-12MPa.
According to specific embodiments of the present invention, in described point-line-surface three-phase composite electrocondution slurry, the present invention is to n-formyl sarcolysine
The dosage of base pyrrolidones does not make specific requirement, and those skilled in the art can need the reasonable selection n-formyl sarcolysine according to actual job
The dosage of base pyrrolidones dispersant.
According to specific embodiments of the present invention, in described point-line-surface three-phase composite electrocondution slurry, the bowl-type carbon materials
There is interaction, the interaction between material, graphene and other carbon material each components to cause bowl-type carbon material, graphene
And the three-dimensional conductive network structure of point-line-surface is formd between other carbon materials, exactly because the pattern knot that bowl-type carbon material is special
The conductive network structure of structure and point-line-surface three-dimensional causes composite conducting slurry provided herein to be used as the conductive agent of battery
When, battery has excellent electric property.
Present invention also offers the preparation method of above-mentioned point-line-surface three-phase composite electrocondution slurry, it comprises the following steps：
The graphene, bowl-type carbon material and other carbon materials are well mixed, obtain mixture；The mixture is added again
Enter in N-methyl pyrrolidones, products therefrom stirs in colloid mill, obtains the point-line-surface three-phase composite electrocondution slurry.
According to specific embodiments of the present invention, in the preparation method of the point-line-surface three-phase composite electrocondution slurry, preferably
Ground, the time of the stirring is 1-3h.
Present invention also offers application of the above-mentioned point-line-surface three-phase composite electrocondution slurry as battery conductive agent.
According to specific embodiments of the present invention, in the application, it is preferable that the point-line-surface three-phase composite conductive paste
The mass ratio of material, binding agent and LiFePO4 is 4:7:89.
Wherein, the LiFePO4 is used as positive electrode, and the present invention does not make specifically to the specific material of binding agent yet
It is required that those skilled in the art can according to used in operation needs reasonable selection specific binding agent.
Conduction of the point-line-surface three-phase composite electrocondution slurry containing bowl-type carbon material as battery is prepared in the present invention
Agent, it can effectively lift the performance of battery；In the specific embodiment of the invention, dispersate contain 30wt% bowl-types carbon material,
The property for the battery that the composite conducting slurry of 20wt% form the few-layer graphenes alkene and 50wt% CNTs is prepared as conductive agent
Can be the most excellent；Used in battery positive electrode specific discharge capacity numerical value highest, reaches under 2.0C high current density
165mAh/g.In addition, point-line-surface three-phase composite electrocondution slurry provided by the present invention is adapted to large-scale industrial production.
Brief description of the drawings
Fig. 1 is the transmission electron microscope picture for the bowl-type carbon material that the embodiment of the present invention 1 is prepared；
Fig. 2 is the transmission electron microscope picture for the point-line-surface three-phase composite electrocondution slurry that the embodiment of the present invention 3 is prepared；
Fig. 3 is the charge-discharge magnification curve map of battery A-F in application examples of the present invention.
Embodiment
In order to which technical characteristic, purpose and the beneficial effect of the present invention is more clearly understood, in conjunction with detail below
Embodiment and accompanying drawing are described further below to technical scheme progress, but it is not intended that implementing model to the present invention
The restriction enclosed.
Embodiment 1
A kind of preparation method of bowl-type carbon material is present embodiments provided, it includes step in detail below：
(1), weigh 2.0g block copolymer F127 and 3.0g dopamine hydrochlorides sequentially add 200mL deionized water and
(volume ratio of water and ethanol is 0.8 to the mixed solution of ethanol:1) in, then by the instillation of 5.0mL mesitylene wherein, at room temperature
10.0mL ammoniacal liquor is instilled while stirring, and after stirring 2h, with the mixed solution of deionized water and ethanol, (volume ratio of water and ethanol is
0.8:1) washing is for several times with except deactivators F127；
(2), by the poly-dopamine even particulate dispersion washed in the mixed solution of deionized water and ethanol (water and ethanol
Volume ratio be 0.8:1) in, it is placed in the water heating kettle of sealing and carries out hydro-thermal reaction, it is 120 DEG C to set oven temperature, and hydro-thermal is anti-
It is 24h between seasonable；
(3), the sample after hydro-thermal is calcined in horizontal stove, inert nitrogen gas, calcining heat 700 are passed through in stove
DEG C, calcination time 6h, then calcining products obtained therefrom is cooled to room temperature, obtain bowl-type carbon material 1.The transmission of the bowl-type carbon material
Electronic Speculum (TEM) figure is as shown in figure 1, from figure 1 it appears that the product that the present embodiment is prepared is uniform bowl-type.
Embodiment 2
A kind of preparation method of bowl-type carbon material is present embodiments provided, it includes step in detail below：
(1), weigh 2.0g block copolymer F127 and 3.0g dopamine hydrochlorides sequentially add 200mL deionized water and
(volume ratio of water and ethanol is 0.8 to the mixed solution of ethanol:1) in, then by the instillation of 5.0mL mesitylene wherein, at room temperature
10.0mL ammoniacal liquor is instilled while stirring, and after stirring 2h, with the mixed solution of deionized water and ethanol, (volume ratio of water and ethanol is
0.8:1) washing is for several times with except deactivators F127；
(2), by the poly-dopamine even particulate dispersion washed in the mixed solution of deionized water and ethanol (water and ethanol
Volume ratio be 0.8:1) in, it is placed in the water heating kettle of sealing and carries out hydro-thermal reaction, it is 120 DEG C to set oven temperature, and hydro-thermal is anti-
It is 24h between seasonable；
(3), the sample after hydro-thermal is calcined in horizontal stove, inert nitrogen gas, calcining heat 600 are passed through in stove
DEG C, calcination time 6h, then calcining products obtained therefrom is cooled to room temperature, obtain bowl-type carbon material 2.
Embodiment 3
A kind of preparation method of bowl-type carbon material is present embodiments provided, it includes step in detail below：
(1), weigh 2.0g block copolymer F127 and 3.0g dopamine hydrochlorides sequentially add 200mL deionized water and
(volume ratio of water and ethanol is 0.8 to the mixed solution of ethanol:1) in, then by the instillation of 5.0mL mesitylene wherein, at room temperature
10.0mL ammoniacal liquor is instilled while stirring, and after stirring 2h, with the mixed solution of deionized water and ethanol, (volume ratio of water and ethanol is
0.8:1) washing is for several times with except deactivators F127；
(2), by the poly-dopamine even particulate dispersion washed in the mixed solution of deionized water and ethanol (water and ethanol
Volume ratio be 0.8:1) in, it is placed in the water heating kettle of sealing and carries out hydro-thermal reaction, it is 120 DEG C to set oven temperature, and hydro-thermal is anti-
It is 24h between seasonable；
(3), the sample after hydro-thermal is calcined in horizontal stove, inert nitrogen gas, calcining heat 800 are passed through in stove
DEG C, calcination time 6h, then calcining products obtained therefrom is cooled to room temperature, obtain bowl-type carbon material 3.
Test bowl-type carbon material 1-3 electrical conductivity respectively using four probe instruments, test result is shown in as shown in table 1 below.
Table 1
| Material | Electrical conductivity S/cm |
| Bowl-type carbon material 1 | 581 |
| Bowl-type carbon material 2 | 322 |
| Bowl-type carbon material 3 | 449 |
, it is apparent that the electric conductivity for the bowl-type carbon material that embodiment 1 is prepared is more excellent from table 1, its conductance
Rate is 581S/cm, and this is also indicated that under the premise of other conditions identical, and 700 DEG C are optimum calcining heat, therefore, subsequently
The bowl-type carbon material 1 being also prepared when preparing electrocondution slurry from embodiment 1.
Embodiment 4
Present embodiments provide a kind of supercritical CO of graphene2Shear treatment, it comprises the following steps：
Weigh 15g graphenes to be placed in tank body, it is 50 DEG C to set temperature, gas CO2Pressure is 10MPa, carries out super face
Boundary shears, and after repeating 2-10 times, obtains form the few-layer graphene alkene.
Embodiment 5
A kind of point-line-surface three-phase composite electrocondution slurry is present embodiments provided, it includes dispersate and dispersant, with described
The gross mass of dispersate be 100% meter, the dispersate include 60wt% embodiment 1 be prepared bowl-type carbon material,
The form the few-layer graphene alkene and 20wt% CNT that 20wt% embodiment 2 is prepared；The dispersant is N-methyl pyrrole
Pyrrolidone；
The preparation method of the point-line-surface three-phase composite electrocondution slurry comprises the following steps：
The CNT and 3.0g embodiments 1 for weighing form the few-layer graphene alkene, 1.0g that 1.0g embodiments 2 are prepared are prepared into
The bowl-type carbon material arrived, three is well mixed, then is added mixture in 495g N-methyl pyrrolidones, products therefrom
1.5h is stirred in colloid mill, obtains the point-line-surface three-phase composite electrocondution slurry that mass fraction is 1%；
Transmission electron microscope (TEM) figure of the point-line-surface three-phase composite electrocondution slurry as shown in Fig. 2 from figure 2 it can be seen that
In the point-line-surface three-phase composite electrocondution slurry that the present embodiment is prepared, graphene, CNT and bowl-type carbon material can be clear
See to Chu, show that the three-phase composite electrocondution slurry is well mixed.
Embodiment 6
A kind of point-line-surface three-phase composite electrocondution slurry is present embodiments provided, it includes dispersate and dispersant, with described
The gross mass of dispersate be 100% meter, the dispersate include 20wt% embodiment 1 be prepared bowl-type carbon material,
The form the few-layer graphene alkene and 10wt% CNT that 70wt% embodiment 2 is prepared；The dispersant is N-methyl pyrrole
Pyrrolidone；
The preparation method of the point-line-surface three-phase composite electrocondution slurry comprises the following steps：
The CNT and 1.0g embodiments 1 for weighing form the few-layer graphene alkene, 0.5g that 3.5g embodiments 2 are prepared are prepared into
The bowl-type carbon material arrived, three is well mixed, then is added mixture in 495g N-methyl pyrrolidones, products therefrom
1.5h is stirred in colloid mill, obtains the point-line-surface three-phase composite electrocondution slurry that mass fraction is 1%.
Embodiment 7
A kind of point-line-surface three-phase composite electrocondution slurry is present embodiments provided, it includes dispersate and dispersant, with described
The gross mass of dispersate be 100% meter, the dispersate include 30wt% embodiment 1 be prepared bowl-type carbon material,
The form the few-layer graphene alkene and 50wt% CNT that 20wt% embodiment 2 is prepared；The dispersant is N-methyl pyrrole
Pyrrolidone；
The preparation method of the point-line-surface three-phase composite electrocondution slurry comprises the following steps：
The CNT and 1.5g embodiments 1 for weighing form the few-layer graphene alkene, 2.5g that 1.0g embodiments 2 are prepared are prepared into
The bowl-type carbon material arrived, three is well mixed, then is added mixture in 495g N-methyl pyrrolidones, products therefrom
1.5h is stirred in colloid mill, obtains the point-line-surface three-phase composite electrocondution slurry that mass fraction is 1%.
Comparative example 1
This comparative example provides two kinds of electrocondution slurries, and its preparation method specifically includes following steps：
Form the few-layer graphene alkene, CNT that 5.0g embodiment 2 is prepared are weighed respectively, are added separately to 495g
N-methyl pyrrolidones after, 1.5h is stirred in colloid mill, obtains the conductive paste that dispersate is respectively graphene, CNT
Material.
Comparative example 2
This comparative example provides a kind of electrocondution slurry, and its preparation method specifically includes following steps：
The bowl-type carbon material that the embodiment 1 of the CNT and 2.5g that weigh 2.5g respectively is prepared, is added into
After 495g N-methyl pyrrolidones, stirred in colloid mill 1.5h, obtain dispersate as CNT, bowl-type carbon material
Electrocondution slurry.
Application examples
1st, weigh 0.2706g binding agents to be shelved in beaker, the binding agent is PVDF (Kynoar) N-methyl
The concentration of pyrrolidone solution, wherein Kynoar is 7wt%, can have electrocondution slurry using the binding agent preferable
Viscosity；
It is (right that the electrocondution slurry that 1.08g embodiments 5-7 and comparative example 1-2 is prepared is added into the binding agent respectively
The battery answered is designated as battery A-F respectively), then weigh 0.2403g LiFePO4s (positive electrode) and be added thereto, uniform stirring
12h；Wherein, the mass ratio of LiFePO4, binding agent and electrocondution slurry is 89:7:4；
2nd, the product that step 1 obtains uniformly is smeared on aluminium foil with coater, dried in baking oven；
3rd, carry out battery assembling in sequence in the glove box full of argon gas atmosphere (battery is assembled into this area routine skill
Art means), wherein, electrolyte is 1mol/L LiPF6Solution, the solvent of the solution is by v (ethylene carbonate):V (carbonic acid first
Ethyl ester):V (dimethyl carbonate)=1:1:The mixed liquor of 1 composition；After being completed, battery A-F is entered on charge-discharge test instrument
Row test, obtained charge-discharge magnification curve map are as shown in Figure 3.
From figure 3, it can be seen that battery C performance is best, especially under high current 2.0C, its specific discharge capacity is substantially high
In battery D, battery E performance, and under equal current condition, discharge capacity of its specific discharge capacity also above battery F, tool
Body, the specific discharge capacity numerical value highest under 2.0C high current density of positive electrode used in battery C, reach 165mAh/g,
This shows that battery C has good chemical property.
Claims (10)
1. a kind of preparation method of bowl-type carbon material, it comprises the following steps：
(1), block copolymer F127 and dopamine hydrochloride are sequentially added in the mixed solution of deionized water and ethanol, then
Trimethylbenzene is instilled thereto, obtains mixed solution A；Ammoniacal liquor is added into the mixed solution A again under stirring condition, continues to stir
Mix, obtain mixed solution B；The mixed solution of deionized water and ethanol is used to wash the mixed solution B to remove block copolymerization again
Thing F127, after filtering, obtain poly-dopamine particle；
Preferably, the trimethylbenzene is mesitylene；
(2), the poly-dopamine even particulate dispersion is entered after the mixed solution of deionized water and ethanol under air-proof condition
Water-filling thermal response；
It is further preferred that the temperature of hydro-thermal reaction described in step (2) is 80-180 DEG C, reaction time 12-36h；
(3) hydro-thermal reaction products therefrom, is subjected to calcination processing under an inert atmosphere, obtains the bowl-type carbon material；
It is further preferred that the temperature of calcination processing described in step (3) is 300-1000 DEG C, calcination time 2-8h；
It is highly preferred that the temperature of the calcination processing is 500-1000 DEG C.
2. preparation method according to claim 1, it is characterised in that the dopamine hydrochloride, block copolymer F127,
The mass ratio of the mixed solution of deionized water used and ethanol is 1 in ammoniacal liquor, trimethylbenzene and mixed solution A:0.1-10:10-
200:0.1-20:20-200。
3. preparation method according to claim 1, it is characterised in that in the aqueous solution of deionized water and ethanol, deionization
The volume ratio of water and ethanol is 0.1-10:1；Preferably 0.8:1.
4. the bowl-type carbon material that the preparation method of the bowl-type carbon material described in claim any one of 1-3 is prepared.
5. a kind of point-line-surface three-phase composite electrocondution slurry, it includes dispersate and dispersant, it is characterised in that with the dispersate
Gross mass for 100% meter, the dispersate include 10-80wt% claim 4 described in bowl-type carbon material, 10-80wt%
Graphene and 10-80wt% other carbon materials；And the weight hundred of the bowl-type carbon material, graphene and other carbon materials
It is 100% to divide content sum；
The dispersant is N-methyl pyrrolidones.
6. point-line-surface three-phase composite electrocondution slurry according to claim 5, it is characterised in that other described carbon materials include
One or more of combinations in graphite, carbon black, porous carbon, CNT, fullerene, graphene, green coke and ripe Jiao.
7. the point-line-surface three-phase composite electrocondution slurry according to claim 5 or 6, it is characterised in that the graphene is warp
Supercritical CO2Graphene after shear treatment；
Preferably, the temperature of the overcritical shear treatment is 40-60 DEG C, pressure 8-12MPa.
8. the preparation method of the point-line-surface three-phase composite electrocondution slurry described in claim any one of 5-7, it comprises the following steps：
The graphene, bowl-type carbon material and other carbon materials are well mixed, obtain mixture；Nitrogen is added the mixture to again
In methyl pyrrolidone, products therefrom stirs in colloid mill, obtains the point-line-surface three-phase composite electrocondution slurry；
Preferably, the time of the stirring is 1-3h.
9. application of the point-line-surface three-phase composite electrocondution slurry described in claim any one of 5-7 as battery conductive agent.
10. application according to claim 9, it is characterised in that the point-line-surface three-phase composite electrocondution slurry, binding agent and
The mass ratio of LiFePO4 is 4:7:89.
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| CN112582617A (en) * | 2020-12-08 | 2021-03-30 | 上海电力大学 | Nitrogen-selenium co-doped porous carbon sphere and sodium ion battery cathode material, and preparation method and application thereof |
| CN114628668A (en) * | 2020-12-10 | 2022-06-14 | 中国科学院大连化学物理研究所 | Nitrogen-doped carbon-supported FeP @ NC and preparation and application thereof |
| CN114628668B (en) * | 2020-12-10 | 2023-11-03 | 中国科学院大连化学物理研究所 | FeP@NC taking nitrogen doped carbon as carrier and preparation and application thereof |
| CN115364899A (en) * | 2022-01-28 | 2022-11-22 | 浙江理工大学 | Catalyst for treating waste liquid containing Cr (VI) and preparation method thereof |
| CN114890458A (en) * | 2022-05-26 | 2022-08-12 | 山东省科学院新材料研究所 | Metal oxide-carbon-based composite material with bowl-shaped structure and preparation method and application thereof |
| CN114890458B (en) * | 2022-05-26 | 2022-12-20 | 山东省科学院新材料研究所 | Metal oxide-carbon-based composite material with bowl-shaped structure and preparation method and application thereof |
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