CN104953100A - Preparation method of carbon/graphite/tin composite anode material - Google Patents
Preparation method of carbon/graphite/tin composite anode material Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to a preparation method of a carbon/graphite/tin composite anode material. The carbon/graphite/tin composite anode material adopts the following raw materials in percentage by weight and particle size: 1.5-2.5% of carbon black, 5-8% of natural graphite with the particle size being smaller than or equal to 1 mm, 3-10% of nanosized tin with the particle size being smaller than or equal to 100 nm, 25-30% of calcined petroleum coke powder with the particle size being smaller than or equal to 0.075 mm, 15-20% of calcined petroleum coke with the particle size being 1-4 mm, 10-15% of electric calcined anthracite with the particle size being 4-10 mm, 5-10% of electric calcined anthracite with the particle size being 10-16 mm, 5-15% of calcined pitch coke with the particle size being 10-16 mm, 18-20% of coal pitch, and short carbon fiber, wherein short carbon fiber accounts for 1-3% the total amount of the raw materials. The carbon/graphite/tin composite anode material is prepared by adopting the steps of burdening, mixing, kneading, roasting, graphitizing, smashing, and spheroidizing. The carbon/graphite/tin composite anode material prepared by adopting the preparation method provided by the invention combines respective advantages of carbon material, graphite material and tin powder when serving as anode materials, and the prepared carbon/graphite/tin composite anode material has the characteristics of high first-cycle capacity, high initial charge-discharge efficiency, electrolyte solvent resistance and isotropic homogeneity and the like.
Description
Technical field
The present invention relates to a kind of preparation method of charcoal/graphite/tin composite negative pole material, belong to technical field of lithium ion.
Background technology
Since the beginning of the nineties in last century, Sony energy technology company took the lead in successfully developing the lithium ion battery using Carbon anode, lithium ion battery captures rapidly civil secondary Battery Market with the speed of average annual 15%, has become the first-selected power supply of current portable electronic equipment.The develop rapidly of lithium ion battery mainly has benefited from the contribution of electrode material, the particularly progress of negative material.Lithium ion battery negative material requires to possess following characteristics: 1. alap electrode potential; 2. ion has higher diffusivity in negative pole solid-state structure; 3. the deintercalation invertibity of height; 4. good conductivity and thermodynamic stability; 5. security performance is good; 6. good with electrolyte solvent compatibility; 7. aboundresources, cheap, environmentally safe.Negative material is one of large raw material (positive pole, negative pole, electrolyte, barrier film) of lithium ion battery four, what current commercial Li-ion battery negative material adopted is graphite-like material with carbon element, having lower lithium embedding/deintercalation current potential, suitable reversible capacity and aboundresources, the advantage such as cheap, is more satisfactory lithium ion battery negative material.
Inexpensive with it, the nontoxic and superior chemical property of material with carbon element is widely used in lithium ion battery, and state of interface and the fine structure of itself have a great impact electrode performance.At present, commercial carbon negative electrode material of lithium ion cell can be divided into graphite, hard carbon and soft carbon three class, and wherein graphite type material is still the main flow of lithium ion battery negative material.Graphite-like material with carbon element, having lower lithium embedding/deintercalation current potential, suitable reversible capacity and aboundresources, the advantage such as cheap, is more satisfactory lithium ion battery negative material.But its theoretical specific capacity only has 372mAh/g, thus limit the further raising of lithium ion battery specific energy, the demand of growing high-energy Portable power source can not be met.Meanwhile, when graphite is as negative material, in first charge-discharge process, form one deck solid electrolyte film (SEI) on its surface.Solid electrolyte film is the formation that react to each other such as electrolyte, negative material and lithium ion, irreversibly consumes lithium ion, is to form the main factor of of irreversible capacity; It two is in the process of Lithium-ion embeding, electrolyte easily and its be embedded in the process of moving out altogether, electrolyte is reduced, the gaseous product generated causes graphite flake layer to peel off, especially containing in the electrolyte of PC, graphite flake layer comes off new for formation interface, causes further SEI to be formed, irreversible capacity increases, and cyclical stability declines simultaneously.As lithium ion battery negative material, material with carbon element still exists that charge/discharge capacity is low, first cycle irreversible loss is large, solvent molecule intercalation and the shortcoming such as preparation cost is high altogether, and these are also the key issues solved needed in current Study on Li-ion batteries.
Carbon fiber is a kind of novel material with carbon element, divides mainly contain PAN base carbon fibre (on market, more than 90% is this kind of carbon fiber), viscose-based carbon fiber, asphalt base carbon fiber etc. three kinds by raw material.In general, the resistivity of asphalt base carbon fiber is less than PAN base carbon fibre, and PAN base carbon fibre resistivity is less than viscose-based carbon fiber.Electronics rate all can reduce along with the rising of heat treatment temperature.
Chinese patent CN 102623704A, by adding carbon fiber, utilize its high conductivity and strong adsorptivity to prepare lithium carbonate-carbon fiber composite negative pole material to solve the problem of material high rate charge-discharge performance and raising conductivity, meet the requirement of modern society to lithium ion battery applications.Chinese patent CN 102290582A, by adding nanometer overlength carbon fiber VGCF, improving battery conductive, reducing internal resistance.
A kind of tin/graphene/carbon fiber composite lithium cell cathode material preparation method that Chinese patent CN 104037393A announces, the network configuration that Graphene and carbon fiber mixing are formed, for lithium ion turnover electrode provides a large amount of transfer passages smoothly, make it fully contact with negative material, improve the utilization ratio of negative material.Improve the transport velocity of lithium during active position and the discharge and recharge of negative material storage lithium.The high conduction performance of Graphene and carbon fiber can realize carrier mobility fast, effectively can reduce the internal resistance of battery itself while improving power output.
Metallic tin has the advantages such as high lithium storage content (994 mAh/g) and low lithium ion deintercalation platform voltage, is the extremely potential non-carbon negative material of one.People have carried out this kind of material and have studied widely in recent years, and make some progress.But in reversible lithium storage process, metallic tin volumetric expansion is remarkable, and cause cycle performance to be deteriorated, capacity is decayed rapidly, is therefore difficult to the requirement meeting large-scale production.For this reason, by introducing the nonmetalloids such as carbon, carrying out stable metal tin in the mode of alloying or compound, slowing down the volumetric expansion of tin.Carbon can stop the direct contact between tin particles, suppresses the reunion of tin particles and grows up, playing the effect of resilient coating.
Although the research of tin material with carbon element obtains larger progress, the fusing point of metallic tin only has 232 DEG C, and it inevitably volumetric expansion occurs when carrying out high-temperature heat treatment.Current, when tin material with carbon element is heat-treated, be mainly faced with following problems.Tin carbon composite is when higher temperatures heat treatment, and tin particles is easier to merge and is agglomerated into bulky grain, electrode material powder of detached in cyclic process, causes the rapid reduction of battery capacity and cycle performance to be deteriorated; When Low Temperature Heat Treatment, the resistance of tin carbon composite is large, and conductivity is bad.Therefore, in order to improve the conductivity of tin carbon composite and alleviate metallic tin particle agglomeration under higher thermal treatment temperature, can have by introducing the thermal endurance that dystectic material improves tin carbon composite.Wherein, nickel is the metal with satisfactory electrical conductivity, and fusing point is 1453 DEG C, is incorporated in tin carbon composite and can improves composite material heat treatment temperature and obtain the negative material with good electrical chemical property.Renzong Hu etc. adopt e-beam evaporation to prepare and have nucleocapsid and multiple dimensioned Sn-C-Ni negative material, and this electrode material shows excellent capability retention and high high rate performance.He Chunnian etc. adopt pyrolysismethod to prepare two-dimentional porous graphite carbon-coating nickel tin alloy material, and it has very high specific capacity and fabulous cycle performance (application number 201310715142.1) for lithium ion battery negative.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of preparation method of charcoal/graphite/tin composite negative pole material, and the negative material that the method prepares has high-pressure solid performance, high connductivity and high rate capability, and long circulating performance.
For solving above technical problem, the technical solution used in the present invention is:
A kind of preparation method of charcoal/graphite/tin composite negative pole material, raw material adopts following granularity and percentage by weight batching: carbon black 1.5-2.5%, ≤ 1mm native graphite 5-8%, ≤ 100nm nanometer tin 3-10% ,≤0.075mm calcined petroleum coke powder 25-30%, 1 ~ 4mm calcined petroleum coke 15-20%, 4 ~ l0mm electric calcined anthracite 10-15%, 10-16mm electric calcined anthracite 5 ~ 10%, 10-16mm calcines pitch coke 5 ~ 15%, coal tar pitch 18-20%; Chopped carbon fiber is 1 ~ 3% of above raw material total amount.
Calcined petroleum coke powder and calcined petroleum coke form through about 1300 DEG C of calcinings.
Electric calcined anthracite forms through more than about 1100-2000 DEG C temperature calcination.
Calcining pitch coke forms through about 1300 DEG C of calcinings.
Carbon black is conductive black, acetylene carbon black, semi-reinforcing hydrocarbon black and relevant carbon black, and performance index are close with the common carbon brush carbon black feed stock of production.
Native graphite can be crystalline flake graphite also can be the amorphous graphite of low ash, and performance index are with to produce common electromechanics carbon and graphite products natural graphite starting material close.
Coal tar pitch can be medium temperature coal pitch can also be modified coal asphalt.
A preparation method for charcoal/graphite/tin composite negative pole material, its preparation process comprises:
(1) batching, kneading, first carry out combined ingredient by carbon black, native graphite, nanometer tin, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and chopped carbon fiber, heat mediate after being dry mixed with coal-tar bond, forms composite plastic gonosome;
(2) roasting, directly loads baking furnace by composite plastic gonosome, through 900-1100 DEG C of roasting, makes carbon material;
(3) graphitization, loads graphitizing furnace by carbon material, through 2200-3000 DEG C of high-temperature process, and obtained charcoal/graphite/tin composite material;
(4) pulverize, nodularization, charcoal/graphite/tin composite material is carried out pulverize, nodularization, obtains spherical or oval charcoal/graphite/tin negative pole powder that particle diameter D50 is 8 ~ 25 μm.
As preferred technical scheme, described kneading, first carbon black, native graphite, nanometer tin, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcining pitch coke are added in kneading machine, add chopped carbon fiber again after interval 5-6 minute to be dry mixed, the time of being dry mixed is 35-40 minute, and being dry mixed temperature is 120-150 DEG C; When being dry mixed temperature and reaching time and the temperature of setting, the coal tar pitch adding 175 DEG C-185 DEG C carries out wet mixing, the wet mixing time is at 30-50 minute, kneading temperature is 160-165 DEG C, thickener after kneading is carried out cool material, when thickener temperature is down to 125-145 DEG C, adds in mould and form composite plastic gonosome.
As preferred technical scheme, described carbon fiber is PAN base chopped carbon fiber or asphaltic base chopped carbon fiber.
Described chopped carbon fiber length can be 10-200mm, and average diameter is 5 μm-30 μm.Organic solvent was adopted in advance, as alcohol, acetone etc. carry out dispersion treatment before carbon fiber being added kneading machine.
Lithium ion battery is a kind of rechargeable battery, it mainly rely on lithium ion between a positive electrode and a negative electrode movement carry out work.In charge and discharge process, Li
+come and go between two electrodes and embed and deintercalation: during rechargable battery, Li
+from positive pole deintercalation, embed negative pole through electrolyte, negative pole is in rich lithium state; Then contrary during electric discharge.And graphite cathode material is owing to having good layer structure, be applicable to the embedding-deviate from and form Intercalation reaction formula compound L iC of lithium
x, and there is good charge and discharge platform, be therefore subject to extensive use.And graphite is as lithium ion battery negative material, rushing in electric process first, graphite and electrolyte interface can generate SEI film by interfacial reaction, cause the loss of irreversible capacity, therefore, the theoretical capacity of graphite cathode material is 372mAh/g, but in actual use, its capacity plays and is generally 330 ~ 360 mAh/g, lower than theoretical capacity.And the specific area that SEI film produces irreversible capacity loss and the graphite cathode material caused has direct relation, the specific area of graphite is large, and the scope of electrolyte and graphite contact is large, and the SEI of generation is too much, and the irreversible capacity loss caused is also larger.Meanwhile, because graphite is especially in the electrolyte containing PC, easy and electrolyte occurs embedding altogether, and causes graphite flake layer to peel off, and forms new end face, causes further SEI to be formed, cause cycle performance constantly to reduce.Therefore, the graphite coat modification generally adopted at present, excessive for the specific area of graphite exactly and carry out coated one deck modified layer to reduce the specific area of material, thus improve the discharging efficiency first of graphite, promote its capacity and play and stable circulation performance.
By the Combined Processing to multiple Carbon Materials and material with carbon element presoma and nanometer tin, obtained charcoal/graphite/tin composite material, not only avoid low-crystallinity Carbon Materials capacity low, irreversible capacity loss is large first, next avoids graphite material and embedding altogether and degradation shortcoming under causing cycle performance occurs in organic solvent, composite material effectively can alleviate the bulk effect of tin in charging process simultaneously, by in conjunction with Carbon Materials and graphite type material and glass putty as respective advantage during negative material, it is high that composite material prepared by the present invention has capacity first, first charge-discharge efficiency is high, electrolyte resistance solvent, the features such as isotropism.Production technology of the present invention is simple simultaneously, excellent product performance, can large-scale production.
Embodiment
Embodiment 1
Batching is :≤1mm micro crystal graphite 5% ,≤100nm nanometer tin 5% ,≤0.075mm calcined petroleum coke 26%, 1 ~ 4mm calcined petroleum coke 15%, 4 ~ l0mm electric calcined anthracite 10%, 10-16mm electric calcined anthracite 5%, 10-16mm calcines pitch coke 14%, acetylene carbon black 2%, coal tar pitch 18%.The T300PAN chopped carbon fiber (diameter 12 μm, length 10mm) of additional above raw material weight 1%, preparation process is as follows:
(1) batching, kneading, first add in kneading machine by carbon black, native graphite, nanometer tin, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcining pitch coke, the time of being dry mixed is 35 minutes, and being dry mixed temperature is 120 DEG C; When being dry mixed temperature and reaching time and the temperature of setting, the coal tar pitch adding 175 DEG C carries out wet mixing, and the wet mixing time, kneading temperature was 160 DEG C at 30 minutes, forms composite plastic gonosome;
(2) roasting, loads baking furnace by green, through 1100 DEG C of roastings, makes carbon material;
(3) graphitization, loads graphitizing furnace by carbon material, through 2500 DEG C of high-temperature process, and obtained charcoal/graphite/tin composite material;
(4) pulverize, nodularization, charcoal/graphite/tin composite material is carried out pulverize, nodularization, obtains spherical or oval charcoal/graphite/tin negative pole powder that particle diameter D50 is 12.53 μm.
Embodiment 2
Batching is :≤1mm micro crystal graphite 5% ,≤100nm nanometer tin 10% ,≤0.075mm calcined petroleum coke 25%, 1 ~ 4mm calcined petroleum coke 13%, 4 ~ l0mm electric calcined anthracite 8%, 10-16mm electric calcined anthracite 5%, 10-16mm calcines pitch coke 14%, acetylene carbon black 2%, coal tar pitch 18%.Additional 1% T300PAN chopped carbon fiber (diameter 12 μm, length 10mm), preparation process is as follows:
(1) batching, kneading, first carbon black, native graphite, nanometer tin, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcining pitch coke are added in kneading machine, add chopped carbon fiber again after interval 5-6 minute to be dry mixed, the time of being dry mixed is 35 minutes, and being dry mixed temperature is 120 DEG C; When being dry mixed temperature and reaching time and the temperature of setting, the coal tar pitch adding 175 DEG C carries out wet mixing, and the wet mixing time, kneading temperature was 160 DEG C at 30 minutes, forms composite plastic gonosome;
(2) roasting, loads baking furnace by green, through 1100 DEG C of roastings, makes carbon material;
(3) graphitization, loads graphitizing furnace by carbon material, through 2500 DEG C of high-temperature process, and obtained carbon graphite composite material;
(4) pulverize, nodularization, charcoal/graphite/tin composite material is carried out pulverize, nodularization, obtains spherical or oval charcoal/graphite/tin negative pole powder that particle diameter D50 is 11.63 μm.
Embodiment 3
Adopt embodiment 2 to prepare burden constant, additional 2% T300PAN chopped carbon fiber (diameter 12 μm, length 10mm), technique is as embodiment 1.
Embodiment 4
Adopt embodiment 2 to prepare burden constant, additional 3%T300PAN chopped carbon fiber (diameter 12 μm, length 10mm), technique is as embodiment 2.
Embodiment 5
Adopt embodiment 2 to prepare burden constant, respectively additional 3% asphaltic base chopped carbon fiber (diameter 20 μm, length 10mm), technique is as embodiment 2.
Embodiment 6
Batching is: 0.1mm micro crystal graphite 8% ,≤100nm nanometer tin 7%, 0.01mm calcined petroleum coke 25%, 1mm calcined petroleum coke 15%, 4mm electric calcined anthracite 10%, 10mm electric calcined anthracite 5.5%, 10mm calcining pitch coke 10%, acetylene carbon black 1.5%, coal tar pitch 18%.Additional 2%T300PAN chopped carbon fiber (diameter 5 μm, length 200mm).Chopped carbon fiber being added kneading machine adopted organic solvent-acetone to carry out dispersion treatment in the past in advance, and preparation process is as follows:
(1) batching, kneading, first carbon black, native graphite, nanometer tin, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcining pitch coke are added in kneading machine, interval adds chopped carbon fiber again and is dry mixed after 6 minutes, the time of being dry mixed is 40 minutes, and being dry mixed temperature is 150 DEG C; When being dry mixed temperature and reaching time and the temperature of setting, the coal tar pitch adding 185 DEG C carries out wet mixing, and the wet mixing time was at 50 minutes, kneading temperature is 165 DEG C, thickener after kneading is carried out cool material, when thickener temperature is down to 125 DEG C, adds in mould and form composite plastic gonosome;
(2) roasting, loads baking furnace by green, through 1000 DEG C of roastings, makes carbon material;
(3) graphitization, loads graphitizing furnace by carbon material, through 2500 DEG C of high-temperature process, and obtained carbon graphite composite material;
(4) pulverize, nodularization, charcoal/graphite/tin composite material is carried out pulverize, nodularization, obtains spherical or oval charcoal/graphite/tin negative pole powder that particle diameter D50 is 13.94 μm.
Electrochemical property test
For the performance of negative material prepared by inspection the inventive method, test by half-cell method of testing, negative material by above embodiment: acetylene black: PVDF(Kynoar)=93:3:4(weight ratio), add appropriate NMP(N-methyl pyrrolidone) furnishing pulpous state, coat on Copper Foil, within 8 hours, make negative plate through vacuum 110 DEG C of dryings; Be to electrode with metal lithium sheet, electrolyte is 1mol/L LiPF6/EC+DEC+DMC=1:1:1, and microporous polypropylene membrane is barrier film, is assembled into battery.Charging/discharging voltage is 0 ~ 2.0V, and charge-discharge velocity is 0.2C, and carry out testing to battery performance, test result is in table 1.
Table 1
In order to detect the cycle performance of negative material of the present invention in battery, adopting and being prepared into the detection that 4244130 type Soft Roll resultant battery carry out discharge and recharge.
Negative material by embodiment: SP:SBR(solid content 50%): CMC=94:2.5:1.5:2(weight ratio), add appropriate amount of deionized water and mix furnishing pulpous state, be applied on Copper Foil, at 90 DEG C, vacuumize drying; By LiFePO4 powder: SP:KS-6:PVDF=92:3.5:2:2.5(weight ratio), do after solvent evenly sizes mixing with NMP, be applied on aluminium foil, at 100 DEG C, vacuumize drying; By dried positive and negative electrode pole piece through roll-in, cut-parts, winding, fluid injection, sealing, formation process, make LiFePO4 power type 4244130 type Soft Roll resultant battery (nominal capacity is 2.5Ah), barrier film is Celgard2400, electrolyte is 1M LiPF6 ∕ DMC:EC:DEC, use battery check device to carry out the detection of cycle performance, test result is in table 2.
Table 2
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (5)
1. the preparation method of charcoal/graphite/tin composite negative pole material, it is characterized in that: carbon black 1.5-2.5%, ≤ 1mm native graphite 5-8%, ≤ 100nm nanometer tin 3-10% ,≤0.075mm calcined petroleum coke powder 25-30%, 1 ~ 4mm calcined petroleum coke 15-20%, 4 ~ l0mm electric calcined anthracite 10-15%, 10-16mm electric calcined anthracite 5 ~ 10%, 10-16mm calcines pitch coke 5 ~ 15%, coal tar pitch 18-20%; Chopped carbon fiber is 1 ~ 3% of above raw material total amount, and step comprises:
(1) batching, kneading, first carry out combined ingredient by carbon black, native graphite, nanometer tin, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and chopped carbon fiber, heat mediate after being dry mixed with coal-tar bond, forms composite plastic gonosome;
(2) roasting, directly loads baking furnace by composite plastic gonosome, through 900-1100 DEG C of roasting, makes carbon material;
(3) graphitization, loads graphitizing furnace by carbon material, through 2200-3000 DEG C of high-temperature process, and obtained charcoal/graphite/tin composite material;
(4) pulverize, nodularization, charcoal/graphite/tin composite material is carried out pulverize, nodularization, obtains spherical or oval charcoal/graphite/tin negative pole powder that particle diameter D50 is 8 ~ 25 μm.
2. method according to claim 1, it is characterized in that: the kneading described in step (1), first carbon black, native graphite, nanometer tin, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcining pitch coke are added in kneading machine, add chopped carbon fiber again after interval 5-6 minute to be dry mixed, the time of being dry mixed is 35-40 minute, and being dry mixed temperature is 120-150 DEG C; When being dry mixed temperature and reaching time and the temperature of setting, the coal tar pitch adding 175 DEG C-185 DEG C carries out wet mixing, the wet mixing time is at 30-50 minute, kneading temperature is 160-165 DEG C, thickener after kneading is carried out cool material, when thickener temperature is down to 125-145 DEG C, adds in mould and form composite plastic gonosome.
3. method according to claim 1, is characterized in that: described carbon fiber is PAN base chopped carbon fiber or asphaltic base chopped carbon fiber.
4. the method according to claim 1 or 6, is characterized in that: described chopped carbon fiber length can be 10-200mm, and average diameter is 5 μm-30 μm.
5. method according to claim 1 and 2, is characterized in that: before chopped carbon fiber being added kneading machine, adopt organic solvent to carry out dispersion treatment in advance.
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| CN201510336209.XA CN104953100A (en) | 2015-06-17 | 2015-06-17 | Preparation method of carbon/graphite/tin composite anode material |
| PCT/CN2016/083774 WO2016202164A1 (en) | 2015-06-17 | 2016-05-28 | Preparation method for preparing composite carbon/graphite/tin negative-electrode material |
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| WO2016202164A1 (en) * | 2015-06-17 | 2016-12-22 | 田东 | Preparation method for preparing composite carbon/graphite/tin negative-electrode material |
| CN107551940A (en) * | 2017-10-23 | 2018-01-09 | 北京华索科技股份有限公司 | A kind of charcoal element shaping intelligently fills the method and its system of pitch with kneading pot |
| CN108630926A (en) * | 2018-05-07 | 2018-10-09 | 中国科学院成都有机化学有限公司 | A kind of lithium-sulphur cell positive electrode and preparation method thereof containing short carbon fiber silk |
| CN109728289A (en) * | 2019-01-11 | 2019-05-07 | 暨南大学 | A kind of preparation method of lithium electronics composite negative pole material |
| CN111215633A (en) * | 2020-01-14 | 2020-06-02 | 大同新成新材料股份有限公司 | Method for preparing lithium ion negative electrode material by using tin graphene composite material |
| CN113501515A (en) * | 2021-07-29 | 2021-10-15 | 濮方正 | Innovative process for manufacturing anthracite into conductor material |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103956496A (en) * | 2014-04-29 | 2014-07-30 | 长沙格翎电池材料有限公司 | Lithium ion battery negative active material and preparation method thereof |
| CN104649263A (en) * | 2015-03-06 | 2015-05-27 | 山西亮宇炭素有限公司 | Preparation method of carbon-graphite composite material |
Cited By (8)
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| WO2016202164A1 (en) * | 2015-06-17 | 2016-12-22 | 田东 | Preparation method for preparing composite carbon/graphite/tin negative-electrode material |
| CN107551940A (en) * | 2017-10-23 | 2018-01-09 | 北京华索科技股份有限公司 | A kind of charcoal element shaping intelligently fills the method and its system of pitch with kneading pot |
| CN107551940B (en) * | 2017-10-23 | 2023-09-01 | 北京华索科技股份有限公司 | Method and system for intelligently filling asphalt into kneading pot for carbon forming |
| CN108630926A (en) * | 2018-05-07 | 2018-10-09 | 中国科学院成都有机化学有限公司 | A kind of lithium-sulphur cell positive electrode and preparation method thereof containing short carbon fiber silk |
| CN108630926B (en) * | 2018-05-07 | 2021-09-03 | 中国科学院成都有机化学有限公司 | Lithium-sulfur battery positive electrode containing short carbon fiber filaments and preparation method thereof |
| CN109728289A (en) * | 2019-01-11 | 2019-05-07 | 暨南大学 | A kind of preparation method of lithium electronics composite negative pole material |
| CN111215633A (en) * | 2020-01-14 | 2020-06-02 | 大同新成新材料股份有限公司 | Method for preparing lithium ion negative electrode material by using tin graphene composite material |
| CN113501515A (en) * | 2021-07-29 | 2021-10-15 | 濮方正 | Innovative process for manufacturing anthracite into conductor material |
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