CN106025277A - Low-resilience and high-energy-density composite graphite negative electrode material and preparation method thereof - Google Patents
Low-resilience and high-energy-density composite graphite negative electrode material and preparation method thereof Download PDFInfo
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- 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
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Abstract
The invention provides a low-resilience and high-energy-density composite graphite negative electrode material and a preparation method thereof. A principal material of a raw material is graphite micro-powder or carbon micro-powder; auxiliary materials of the raw material are a coating agent, an adhesive and an organic solvent; pretreatment of the principal material of the raw material is firstly carried out; and then coating, compounding, grading, high-temperature carbonization and high-temperature graphitization are carried out. The problems that the particle size distribution is uncontrollable after the principal material of the raw material and the auxiliary materials of the raw material are coated and compounded, the specific surface area is relatively large, the gram volume is relatively low, the compaction density is relatively low and the pole piece resilience is relatively high are solved.
Description
Technical field
The present invention relates to a kind of low bounce-back, high-energy-density negative material and preparation method thereof, particularly relate to a kind of composite graphite negative electrode material and preparation method thereof.
Background technology
Lithium ion battery has become as the secondary cell solution of IT digital equipment main flow at present, simultaneously because it has the advantages such as memory-less effect, energy density height, long circulation life, power-performance be good, also get more and more and low be applied to base station energy storage, new-energy automobile field, graphite cathode material is again the commercialization negative material of current lithium ion battery main flow, therefore improves the most important thing that the performance of graphite cathode material becomes in work at present.
On the premise of not changing other system of lithium ion battery, improve the gram volume of graphite cathode material and use compacted density, the volume energy density of battery could be improved.And only reduce physics bounce-back and the electrochemistry bounce-back of graphite cathode material, good cycle life could be maintained while improving lithium ion battery energy density, because the bounce-back of graphite cathode material easily causes the stripping of negative material active substance and collector, thus has a negative impact cycle life.Needing exist for explanation, we shelve the thickness after certain time cathode pole piece room temperature or high temperature increases referred to as physics bounce-back, cathode pole piece thickness under embedding lithium state is increased and is referred to as electrochemistry bounce-back.
In order to improve the performance of graphite cathode material, prior art is all to be modified native graphite or Delanium processing.
The Chinese patent application of Publication No. CN1585172A discloses a kind of lithium ion battery negative material and preparation method, and its preparation method includes: Graphite Coating Colophonium, will cladding Colophonium heat treatment.This preparation method can prepare the graphite cathode material of a kind of core～shell structure, and including the shell outside graphite and graphite, shell is the material with carbon element clad with low-crystallinity Turbostratic.Although this preparation method enhances graphite matrix and the structural integrity of protecting film, prevents the common embedding of solvent, the reversible capacity improving negative material and cyclical stability; but this method does not improve the use compacted density of graphite cathode material; reason is: 1) under the conditions of high compacted density, and this core～shell structure are susceptible to that irreversible transformation causes shell to rupture, graphite matrix is exposed and causes capacity attenuation；2) under the conditions of high-pressure solid, it is consistent that this core～shell structure are susceptible to orientation of particles, causes electrochemical expansion bigger；3) surface coated low-crystallinity carbon reversible capacity is the highest, causes capacitance loss；4) the low-crystallinity carbon pressure real density of cladding cladding is relatively low, is negatively affected graphite matrix compacted density.
The Chinese patent application of Publication No. CN100447077C discloses the preparation method of a kind of artificial graphite charcoal negative electrode material and prepared artificial graphite charcoal negative electrode material, its preparation method includes: 1. charging: be alternately added Delanium micropowder and Colophonium that weight ratio is 1.5～19:1 while stirring, continue stirring 0.5～3 hour after adding material, then added in 10～50 minutes and account for graphite microparticles and the reaction promoter of Colophonium gross weight 4～20；2. heat up: start simultaneously at intensification adding reaction promoter, it is desirable in 4～10 hours, be warming up to 500～600 DEG C, the light component during wherein negative pressure extracts above-mentioned material after starting to warm up 1～2 hour；3. constant temperature: 500～600 DEG C of constant temperature 3～8 hours, the heavy constituent during negative pressure extracts above-mentioned material simultaneously and reaction promoter；4. room temperature it is cooled to；5. graphitization.This preparation method can prepare a kind of specific surface area artificial graphite charcoal negative electrode material relatively low, constitutionally stable, but obtain good balance between this method is not compound between particle surface cladding and granule, but simply Delanium micropowder is mixed with Colophonium, then a heat treatment, last graphitization are carried out.When being coated with pitch content and being relatively low, particles coat is uneven, Particles dispersed effect is poor, is susceptible to be orientated unanimously causes electrochemical expansion bigger under the conditions of high-pressure solid；When being coated with pitch content and being higher, particle surface cladding is thicker, and anticathode material gram volume and compacted density produce bigger negative effect, and physics bounce-back is bigger.Therefore, the negative material that prepared by this method is difficult in low bounce-back, the application in high-energy-density field.
Summary of the invention
It is an object of the invention to provide a kind of low bounce-back, high-energy-density composite graphite negative electrode material and preparation method thereof, solve the problems referred to above, this negative material is capable of thin and uniform particle surface covered effect, also can realize being well combined between granule simultaneously.
The above-mentioned purpose of the present invention technical scheme is that, a kind of low bounce-back, the preparation method of high-energy-density composite graphite negative electrode material, comprise the following steps successively:
(1) raw material main material pretreatment: using high crystallinity graphite or easy graphitized charcoal is raw material, carries out powder process, nodularization, staged care, obtains graphite microparticles or the charcoal micropowder of mean diameter 3～18um.
(2) cladding process: the step 1 same covering of gained micropowder, organic solvent are mixed according to 1:0.02～0.5:0.1～0.5 mass percent, mixed process needs heating, obtains being coated with presoma, and negative pressure reclaims organic solvent simultaneously.
(3) recombination process: mixed according to 1:0.1～0.5 mass percent with easy graphitized binder by step 2 gained composite precursor, mixed process needs heating, obtains composite precursor.
(4) classification process: step 3 gained composite precursor is carried out staged care, obtains the intermediate product of mean diameter 6～24um.
(5) high temperature cabonization process: step 4 products therefrom is carried out high temperature cabonization, obtains high temperature cabonization product.
(6) high temperature graphitization process: step 5 gained high temperature cabonization product are carried out high temperature graphitization, obtains a kind of low bounce-back, high-energy-density composite graphite material.
Further, high crystallinity graphite raw material described in step 1 is the Delanium any one or more of scale native graphite, spherical natural graphite, degree of graphitization >=90%, and described in step 1, easy graphitized charcoal is petroleum coke, pitch coke, needle coke any one or more.
Further, covering described in step 2 is that the Colophonium of carbon residue 30%～90%, Colophonium need to be crushed to mean diameter≤10um, and organic solvent described in step 2 is toluene, dimethylbenzene, liquid naphthalene, washing oil, solvent naphtha any one or more.Mixed process speed of agitator is 100～600rpm, heating-up temperature is 100～300 DEG C, incorporation time is 20min～240min, and mixed process needs to carry out under inert atmosphere protection, and the organic vapor that process produces uses negative pressure+condensing mode to reclaim.
Further; easy graphitized binder described in step 3 is the tar production product of carbon residue 5%～30%, mink cell focus processing product any one or more; easily graphitization bonding agent should be liquid; mixed process speed of agitator is 10～200rpm, heating-up temperature is 300～700 DEG C, incorporation time is 4h～8h, and mixed process needs to carry out under inert atmosphere protection.
Further, nodularization process described in step 1, use high speed nodularization equipment, rotating speed 200～5000rpm, nodularization time 5～60min.Pulverizing process described in step 1, uses airflow milling, impact mechanical mill, ball milling, roll mill, Raymond mill any one or more.Classification process described in step 1 and step 4, uses gas flow sizing machine.
Further, high temperature cabonization process described in step 5, heating-up temperature 700～1300 DEG C, heat time heating time 4～10h, high temperature cabonization process needs to carry out under inert atmosphere protection.
Further, high temperature graphitization process described in step 6, heating-up temperature 2400～3200 DEG C, the electrified regulation time 20～60h, graphitizing process adds F2O3, SiO2, SiC, B2O3, BN, BC4 any of which or multiple catalysts.
Using Colophonium as covering, carry out solid-liquid mixing with the main material of raw material, organic solvent, mixed process heats, and can form thin and uniform clad at raw material main material particle surface, obtains being coated with presoma；Using easy graphitization bonding agent to be combined cladding presoma, obtain composite precursor, this composite precursor is re-compounded structure between a kind of granule and granule；Carry out carbonization the most again and graphitization obtains low bounce-back, high-energy-density composite graphite negative electrode material.This negative material mean diameter 6～25um, specific surface area≤2.5m2/ g, gram volume >=355mAh/g, use compacted density >=1.70g/cc, pole piece physics bounce-back≤6%(80 DEG C baking 24h), pole piece electrochemistry bounce-back≤20%(4.2V system full electricity state), solve the main material of raw material with raw material auxiliary material cladding, compound after particle size distribution is uncontrollable, specific surface area compared with big, gram volume is relatively low, use the problems such as compacted density is relatively low, pole piece bounce-back is bigger.And preparation technology control simple, easily operated, the requirement of large-scale production can be met, it is adaptable to high-energy-density IT number and new-energy automobile field.
Accompanying drawing explanation
Fig. 1 be the present invention prepare low bounce-back, Sample Scan Electronic Speculum figure (SEM) of high-energy-density composite graphite negative electrode material.
Fig. 2 be the present invention prepare low bounce-back, the sample half-cell charging and discharging curve figure of high-energy-density composite graphite negative electrode material.
Detailed description of the invention
Further illustrate the present invention by embodiment below, but the present invention is not limited to this.
Embodiment 1: using scale native graphite is raw material, carries out powder process, nodularization, staged care, nodularization equipment rotating speed 500rpm, time 50min, obtains mean diameter 16um graphite microparticles.Weigh gained graphite microparticles 100g to mix with Colophonium micropowder, the 20g toluene of 10g carbon residue 50%; mixed process speed of agitator is 150rpm, heating-up temperature is 120 DEG C, incorporation time is 120min; obtain being coated with presoma; mixed process needs to carry out under inert atmosphere protection, and the organic vapor that process produces uses negative pressure+condensing mode to reclaim.Weighing cladding presoma 100g to mix with the tar production product of carbon residue 50g 6%, mixed process speed of agitator is 30rpm, heating-up temperature is 350 DEG C, incorporation time is 6h, obtains composite precursor, and mixed process needs to carry out under inert atmosphere protection.Gained composite precursor is carried out staged care, obtains the intermediate product of mean diameter 20um.Products therefrom carries out high temperature cabonization, heating-up temperature 800 DEG C, and heat time heating time, 8h, obtained high temperature cabonization product, and high temperature cabonization process needs to carry out under inert atmosphere protection.Gained high temperature cabonization product carry out high temperature graphitization, heating-up temperature 2600 DEG C, electrified regulation time 40h, and graphitizing process adds F2O3 as catalyst.Finally obtain the composite graphite negative electrode material of low bounce-back, high-energy-density, weigh this sample of 50g, sample powder, CMC, SBR are mixed with the mass ratio of 96:2:2, make pole piece, as negative pole after vacuum drying, metal lithium sheet is as positive pole, and it is 364.2mAh/g that 0.1C discharge and recharge records this sample discharge capacity first.
Embodiment 2: using scale native graphite is raw material, carries out powder process, nodularization, staged care, nodularization equipment rotating speed 1000rpm, time 30min, obtains mean diameter 12um graphite microparticles.Weigh gained graphite microparticles 100g to mix with Colophonium micropowder, the 30g dimethylbenzene of 20g carbon residue 60%; mixed process speed of agitator is 200rpm, heating-up temperature is 150 DEG C, incorporation time is 180min; obtain being coated with presoma; mixed process needs to carry out under inert atmosphere protection, and the organic vapor that process produces uses negative pressure+condensing mode to reclaim.Weighing cladding presoma 100g to mix with the tar production product of carbon residue 40g 10%, mixed process speed of agitator is 60rpm, heating-up temperature is 400 DEG C, incorporation time is 8h, obtains composite precursor, and mixed process needs to carry out under inert atmosphere protection.Gained composite precursor is carried out staged care, obtains the intermediate product of mean diameter 16um.Products therefrom carries out high temperature cabonization, heating-up temperature 900 DEG C, and heat time heating time, 7h, obtained high temperature cabonization product, and high temperature cabonization process needs to carry out under inert atmosphere protection.Gained high temperature cabonization product carry out high temperature graphitization, heating-up temperature 2800 DEG C, electrified regulation time 50h, and graphitizing process adds SiO2 as catalyst.Finally obtain the composite graphite negative electrode material of low bounce-back, high-energy-density, weigh this sample of 50g, sample powder, CMC, SBR are mixed with the mass ratio of 96:2:2, make pole piece, as negative pole after vacuum drying, metal lithium sheet is as positive pole, and it is 361.2mAh/g that 0.1C discharge and recharge records this sample discharge capacity first.
Embodiment 3: employing spherical natural graphite is raw material; weigh the spherical graphite micropowder 100g Colophonium micropowder with 30g carbon residue 60% of mean diameter 6um, 35g liquid naphthalene mixes; mixed process speed of agitator is 300rpm, heating-up temperature is 220 DEG C, incorporation time is 30min; obtain being coated with presoma; mixed process needs to carry out under inert atmosphere protection, and the organic vapor that process produces uses negative pressure+condensing mode to reclaim.Weigh cladding presoma 100g to mix with the mink cell focus processing product of carbon residue 40g 15%; mixed process speed of agitator is 80rpm, heating-up temperature is 450 DEG C, incorporation time is 5h; obtaining composite precursor, mixed process needs to carry out under inert atmosphere protection.Gained composite precursor is carried out staged care, obtains the intermediate product of mean diameter 13um.Products therefrom carries out high temperature cabonization, heating-up temperature 700 DEG C, and heat time heating time, 10h, obtained high temperature cabonization product, and high temperature cabonization process needs to carry out under inert atmosphere protection.Gained high temperature cabonization product carry out high temperature graphitization, heating-up temperature 2900 DEG C, electrified regulation time 40h, and graphitizing process adds B2O3 as catalyst.Finally obtain the composite graphite negative electrode material of low bounce-back, high-energy-density, weigh this sample of 50g, sample powder, CMC, SBR are mixed with the mass ratio of 96:2:2, make pole piece, as negative pole after vacuum drying, metal lithium sheet is as positive pole, and it is 363.6mAh/g that 0.1C discharge and recharge records this sample discharge capacity first.
Embodiment 4: the Delanium using degree of graphitization 95% is raw material, carries out powder process, nodularization, staged care, nodularization equipment rotating speed 2000rpm, time 20min, obtains mean diameter 10um graphite microparticles.Weigh graphite microparticles 100g to mix with Colophonium micropowder, the 20g washing oil of 5g carbon residue 70%; mixed process speed of agitator is 350rpm, heating-up temperature is 250 DEG C, incorporation time is 25min; obtain being coated with presoma; mixed process needs to carry out under inert atmosphere protection, and the organic vapor that process produces uses negative pressure+condensing mode to reclaim.Weigh cladding presoma 100g to mix with the mink cell focus processing product of carbon residue 30g 20%; mixed process speed of agitator is 100rpm, heating-up temperature is 500 DEG C, incorporation time is 4h; obtaining composite precursor, mixed process needs to carry out under inert atmosphere protection.Gained composite precursor is carried out staged care, obtains the intermediate product of mean diameter 15um.Products therefrom carries out high temperature cabonization, heating-up temperature 1000 DEG C, and heat time heating time, 6h, obtained high temperature cabonization product, and high temperature cabonization process needs to carry out under inert atmosphere protection.Gained high temperature cabonization product carry out high temperature graphitization, heating-up temperature 3000 DEG C, electrified regulation time 36h, and graphitizing process adds BN as catalyst.Finally obtain the composite graphite negative electrode material of low bounce-back, high-energy-density, weigh this sample of 50g, sample powder, CMC, SBR are mixed with the mass ratio of 96:2:2, make pole piece, as negative pole after vacuum drying, metal lithium sheet is as positive pole, and it is 356.8mAh/g that 0.1C discharge and recharge records this sample discharge capacity first.
Embodiment 5: employing petroleum coke is raw material, carries out powder process, nodularization, staged care, nodularization equipment rotating speed 3000rpm, time 15min, obtains mean diameter 3um charcoal micropowder.Weigh graphite microparticles 100g to mix with Colophonium micropowder, the 40g washing oil of 30g carbon residue 45%; mixed process speed of agitator is 400rpm, heating-up temperature is 250 DEG C, incorporation time is 20min; obtain being coated with presoma; mixed process needs to carry out under inert atmosphere protection, and the organic vapor that process produces uses negative pressure+condensing mode to reclaim.Weigh cladding presoma 100g to mix with the mink cell focus processing product of carbon residue 40g 15%; mixed process speed of agitator is 150rpm, heating-up temperature is 550 DEG C, incorporation time is 7h; obtaining composite precursor, mixed process needs to carry out under inert atmosphere protection.Gained composite precursor is carried out staged care, obtains the intermediate product of mean diameter 6um.Products therefrom carries out high temperature cabonization, heating-up temperature 1000 DEG C, and heat time heating time, 5h, obtained high temperature cabonization product, and high temperature cabonization process needs to carry out under inert atmosphere protection.Gained high temperature cabonization product carry out high temperature graphitization, heating-up temperature 3100 DEG C, electrified regulation time 32h, and graphitizing process adds BC4 as catalyst.Finally obtain the composite graphite negative electrode material of low bounce-back, high-energy-density, weigh this sample of 50g, sample powder, CMC, SBR are mixed with the mass ratio of 96:2:2, make pole piece, as negative pole after vacuum drying, metal lithium sheet is as positive pole, and it is 355.9mAh/g that 0.1C discharge and recharge records this sample discharge capacity first.
Embodiment 6: employing pitch coke is raw material, carries out powder process, nodularization, staged care, nodularization equipment rotating speed 4000rpm, time 10min, obtains mean diameter 5um charcoal micropowder.Weigh graphite microparticles 100g to mix with Colophonium micropowder, the 45g washing oil of 35g carbon residue 70%; mixed process speed of agitator is 500rpm, heating-up temperature is 250 DEG C, incorporation time is 15min; obtain being coated with presoma; mixed process needs to carry out under inert atmosphere protection, and the organic vapor that process produces uses negative pressure+condensing mode to reclaim.Weigh cladding presoma 100g to mix with the mink cell focus processing product of carbon residue 45g 20%; mixed process speed of agitator is 180rpm, heating-up temperature is 600 DEG C, incorporation time is 8h; obtaining composite precursor, mixed process needs to carry out under inert atmosphere protection.Gained composite precursor is carried out staged care, obtains the intermediate product of mean diameter 11um.Products therefrom carries out high temperature cabonization, heating-up temperature 1100 DEG C, and heat time heating time, 4h, obtained high temperature cabonization product, and high temperature cabonization process needs to carry out under inert atmosphere protection.Gained high temperature cabonization product carry out high temperature graphitization, heating-up temperature 3100 DEG C, electrified regulation time 32h, and graphitizing process adds Fe2O3 as catalyst.Finally obtain the composite graphite negative electrode material of low bounce-back, high-energy-density, weigh this sample of 50g, sample powder, CMC, SBR are mixed with the mass ratio of 96:2:2, make pole piece, as negative pole after vacuum drying, metal lithium sheet is as positive pole, and it is 357.2mAh/g that 0.1C discharge and recharge records this sample discharge capacity first.
Embodiment 7: employing needle coke is raw material, carries out powder process, nodularization, staged care, nodularization equipment rotating speed 5000rpm, time 5min, obtains mean diameter 11um charcoal micropowder.Weigh graphite microparticles 100g to mix with Colophonium micropowder, the 50g washing oil of 45g carbon residue 80%; mixed process speed of agitator is 600rpm, heating-up temperature is 250 DEG C, incorporation time is 15min; obtain being coated with presoma; mixed process needs to carry out under inert atmosphere protection, and the organic vapor that process produces uses negative pressure+condensing mode to reclaim.Weighing cladding presoma 100g to mix with the tar production product of carbon residue 50g 10%, mixed process speed of agitator is 200rpm, heating-up temperature is 700 DEG C, incorporation time is 4h, obtains composite precursor, and mixed process needs to carry out under inert atmosphere protection.Gained composite precursor is carried out staged care, obtains the intermediate product of mean diameter 22um.Products therefrom carries out high temperature cabonization, heating-up temperature 1200 DEG C, and heat time heating time, 4h, obtained high temperature cabonization product, and high temperature cabonization process needs to carry out under inert atmosphere protection.Gained high temperature cabonization product carry out high temperature graphitization, heating-up temperature 3200 DEG C, electrified regulation time 60h, and graphitizing process adds SiC as catalyst.Finally obtain the composite graphite negative electrode material of low bounce-back, high-energy-density, weigh this sample of 50g, sample powder, CMC, SBR are mixed with the mass ratio of 96:2:2, make pole piece, as negative pole after vacuum drying, metal lithium sheet is as positive pole, and it is 359.3mAh/g that 0.1C discharge and recharge records this sample discharge capacity first.
The performance parameter that each embodiment prepares sample is as shown in the table:
Claims (12)
1. a low bounce-back, the preparation method of high-energy-density composite graphite negative electrode material, it is characterised in that it comprises the following steps:
(1) raw material main material pretreatment: using high crystallinity graphite or easy graphitized charcoal is raw material, carries out powder process, nodularization, staged care, obtains graphite microparticles or the charcoal micropowder of mean diameter 3～18um；
(2) cladding process: the step 1 same covering of gained micropowder, organic solvent are mixed according to 1:0.02～0.5:0.1～0.5 mass percent, mixed process needs heating, obtains being coated with presoma, and negative pressure reclaims organic solvent simultaneously；
(3) recombination process: being mixed according to 1:0.1～0.5 mass percent with easy graphitized binder by step 2 gained cladding presoma, mixed process needs heating, obtains composite precursor；
(4) classification process: step 3 gained composite precursor is carried out staged care, obtains the intermediate product of mean diameter 6～24um；
(5) high temperature cabonization process: step 4 products therefrom is carried out high temperature cabonization, obtains high temperature cabonization product；
(6) high temperature graphitization process: step 5 gained high temperature cabonization product are carried out high temperature graphitization, obtains a kind of low bounce-back, high-energy-density composite graphite material.
A kind of low bounce-back the most according to claim 1, the preparation method of high-energy-density composite graphite negative electrode material, it is characterized in that, high crystallinity graphite raw material described in step 1 is the Delanium any one or more of scale native graphite, spherical natural graphite, degree of graphitization >=90%, and described in step 1, easy graphitized charcoal is petroleum coke, pitch coke, needle coke any one or more.
A kind of low bounce-back the most according to claim 1, the preparation method of high-energy-density composite graphite negative electrode material, it is characterized in that, covering described in step 2 is that the Colophonium of carbon residue 30%～90%, Colophonium need to be crushed to mean diameter≤10um, and organic solvent described in step 2 is toluene, dimethylbenzene, liquid naphthalene, washing oil, solvent naphtha any one or more.
A kind of low bounce-back the most according to claim 1, the preparation method of high-energy-density composite graphite negative electrode material; it is characterized in that; mixed process speed of agitator described in step 2 is 100～600rpm, heating-up temperature is 100～300 DEG C, incorporation time is 20min～240min; mixed process needs to carry out under inert atmosphere protection, and the organic vapor that process produces uses negative pressure+condensing mode to reclaim.
A kind of low bounce-back the most according to claim 1, the preparation method of high-energy-density composite graphite negative electrode material; it is characterized in that; easy graphitized binder described in step 3 is the tar production product of carbon residue 5%～30%, mink cell focus processing product any one or more; easily graphitization bonding agent should be liquid; mixed process speed of agitator is 10～200rpm, heating-up temperature is 300～700 DEG C, incorporation time is 4h～8h, and mixed process needs to carry out under inert atmosphere protection.
Preparation method the most according to claim 1, it is characterised in that nodularization process described in step 1, uses high speed nodularization equipment, rotating speed 200～5000rpm, nodularization time 5～60min.
A kind of low bounce-back the most according to claim 1, the preparation method of high-energy-density composite graphite negative electrode material, it is characterised in that pulverizing process described in step 1, use airflow milling, impact mechanical mill, ball milling, roll mill, Raymond mill any one or more.
Preparation method the most according to claim 1, it is characterised in that classification process described in step 1 and step 4, uses gas flow sizing machine.
A kind of low bounce-back the most according to claim 1, the preparation method of high-energy-density composite graphite negative electrode material; it is characterized in that, high temperature cabonization process described in step 5, heating-up temperature 700～1300 DEG C; heat time heating time 4～10h, high temperature cabonization process needs to carry out under inert atmosphere protection.
A kind of low bounce-back the most according to claim 1, the preparation method of high-energy-density composite graphite negative electrode material, it is characterized in that, high temperature graphitization process described in step 6, heating-up temperature 2400～3200 DEG C, the electrified regulation time 20～60h, graphitizing process adds F2O3、SiO2、SiC、B2O3、BN、BC4Any of which or multiple catalysts.
11. composite graphite negative electrode materials prepared according to claim 1～10, it is characterised in that mean diameter 6～25um, specific surface area≤2.5m2/ g, gram volume >=355mAh/g, use compacted density >=1.70g/cc, pole piece physics bounce-back≤6%, pole piece electrochemistry bounce-back≤20%.
12. composite graphite negative electrode materials prepared according to claim 1～10, it is characterised in that this composite graphite negative electrode material is to be composited by native graphite and Delanium.
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| CN109103453A (en) * | 2018-08-17 | 2018-12-28 | 东莞市凯金新能源科技股份有限公司 | A kind of preparation method and its material of the graphite cathode material of catalyzed graphitization |
| CN112028064A (en) * | 2020-08-18 | 2020-12-04 | 赣州市瑞富特科技有限公司 | Preparation method of micro hollow sphere graphite negative electrode material |
| CN112670469A (en) * | 2020-12-03 | 2021-04-16 | 宁波杉杉新材料科技有限公司 | Coating agent, modified graphite material, preparation method and application thereof, and lithium ion battery |
| CN112750988A (en) * | 2019-10-29 | 2021-05-04 | 宝武炭材料科技有限公司 | Liquid-coated oil composition and preparation method and application thereof |
| CN114203978A (en) * | 2020-09-17 | 2022-03-18 | 湖南中科星城石墨有限公司 | High-capacity graphite negative electrode material and preparation method and application thereof |
| CN114784228A (en) * | 2022-06-24 | 2022-07-22 | 宁德新能源科技有限公司 | Secondary battery and electronic device |
| CN114203978B (en) * | 2020-09-17 | 2024-05-17 | 湖南中科星城石墨有限公司 | High-capacity graphite anode material and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110256449A1 (en) * | 2010-04-19 | 2011-10-20 | Conocophillips Company | Organic coated fine particle powders |
| CN105428615A (en) * | 2015-11-09 | 2016-03-23 | 大连宏光锂业股份有限公司 | Production method for modified artificial graphite negative electrode material |
-
2016
- 2016-06-18 CN CN201610434286.3A patent/CN106025277B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110256449A1 (en) * | 2010-04-19 | 2011-10-20 | Conocophillips Company | Organic coated fine particle powders |
| CN105428615A (en) * | 2015-11-09 | 2016-03-23 | 大连宏光锂业股份有限公司 | Production method for modified artificial graphite negative electrode material |
Non-Patent Citations (1)
| Title |
|---|
| 甘雷等: ""沥青基人造石墨/天然石墨球复合炭负极材料的制备与性能"", 《中南大学学报（自然科学版）》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109103453A (en) * | 2018-08-17 | 2018-12-28 | 东莞市凯金新能源科技股份有限公司 | A kind of preparation method and its material of the graphite cathode material of catalyzed graphitization |
| CN112750988A (en) * | 2019-10-29 | 2021-05-04 | 宝武炭材料科技有限公司 | Liquid-coated oil composition and preparation method and application thereof |
| CN112028064A (en) * | 2020-08-18 | 2020-12-04 | 赣州市瑞富特科技有限公司 | Preparation method of micro hollow sphere graphite negative electrode material |
| CN114203978A (en) * | 2020-09-17 | 2022-03-18 | 湖南中科星城石墨有限公司 | High-capacity graphite negative electrode material and preparation method and application thereof |
| CN114203978B (en) * | 2020-09-17 | 2024-05-17 | 湖南中科星城石墨有限公司 | High-capacity graphite anode material and preparation method and application thereof |
| CN112670469A (en) * | 2020-12-03 | 2021-04-16 | 宁波杉杉新材料科技有限公司 | Coating agent, modified graphite material, preparation method and application thereof, and lithium ion battery |
| CN114784228A (en) * | 2022-06-24 | 2022-07-22 | 宁德新能源科技有限公司 | Secondary battery and electronic device |
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|---|---|
| CN106025277B (en) | 2018-10-02 |
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