CN108075136A - A kind of carbon nanotube lithium battery negative material and preparation method thereof - Google Patents
A kind of carbon nanotube lithium battery negative material and preparation method thereof Download PDFInfo
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- CN108075136A CN108075136A CN201711448393.2A CN201711448393A CN108075136A CN 108075136 A CN108075136 A CN 108075136A CN 201711448393 A CN201711448393 A CN 201711448393A CN 108075136 A CN108075136 A CN 108075136A
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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
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
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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
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The present invention provides a kind of carbon nanotube lithium battery negative material and preparation method thereof, is related to ion cathode material lithium technical field.Carbon nanotube lithium battery negative material of the present invention is made of following raw material：Negative material, carbon nanotubes, dispersant, cetyl trimethylammonium bromide, solvent；By the present invention in that with cetyl trimethylammonium bromide, dispersant, the dispersiveness of carbon nanotubes in the slurry can effectively be promoted, Stability of Slurry can be significantly improved simultaneously, increase slurry solid content, the addition of cetyl trimethylammonium bromide can effectively inhibit the reunion of carbon nanotubes, reduce slurry viscosity under the conditions of identical solid content simultaneously, improve Stability of Slurry, in addition the electric conductivity of the negative material and mechanical performance have obtained the promotion of bigger, due to the promotion of electric conductivity and mechanical performance, during as lithium ion battery negative material, cycle performance and rate charge-discharge performance, first charge-discharge efficiency is all further promoted.
Description
Technical field
The present invention relates to ion cathode material lithium technical fields, and in particular to a kind of carbon nanotube lithium battery cathode material
Material and preparation method thereof.
Background technology
Lithium ion battery is a kind of new Green Chemistry power supply, is had compared with traditional nickel-cadmium cell, Ni-MH battery
The advantages of voltage height, long lifespan, big energy density.From after nineteen ninety Sony corporation of Japan releases first generation lithium ion battery, it
It has been rapidly developed and has been widely used in various portable devices.Traditional lithium ion battery generally include anode, cathode, every
Four parts of film and electrolyte.The positive electrode of common lithium ion battery is generally selected from the reactive compound containing lithium, cathode material
Material is then selected from carbon-based material.During charging, the potential for being added in battery the two poles of the earth forces the compound of anode to disengage lithium ion, embedded cathode
Molecules align is in the carbon of lamellar structure.During electric discharge, lithium ion is then precipitated from the carbon of lamellar structure, again with the chemical combination of anode
Object combines.
It can be seen that one of an important factor for negative electrode active material is decision performance of lithium ion battery.A kind of good cathode
Active material should have the characteristics that：It is higher than energy；Discharge and recharge reaction good reversibility；With the compatibility of electrolyte and binding agent
It is good；Specific surface area is small (＜ 10m2/g), real density height (＞ 2.0g/cm3)；Size and good mechanical stability in process of intercalation；Money
Source is enriched, cheap；It is stable in the air, have no toxic side effect.At present, carbon material is widely used as the negative of lithium ion battery
The advantages of pole material, these materials is that specific capacity is high (200mAh/g-400mAh/g), and cycle efficieny height (＞ 95%) cycles the longevity
Life is long and inside battery does not have lithium metal that safety problem may be not present.Existing carbon negative pole material has graphite, acetylene black, microballon
Carbon, petroleum coke, carbon fiber, polymer pyrolysis and cracking carbon etc..However, the species of carbon material, preparation method and heat treatment temperature
It when different, can cause the difference on negative material the Nomenclature Composition and Structure of Complexes, and then cause the difference of lithium ion insertion behavior and performance.
In the prior art, usually using native graphite as lithium ion battery negative material.Pure native graphite is as lithium
There is specific capacity high (can reach 370mAh/g-430mAh/g), cheap, abundance excellent during ion battery cathode material
Point.However, poor circulation low there is also first charge-discharge efficiency using the negative electrode of lithium ion battery of native graphite, to electrolysis
The shortcomings that liquid high selectivity.Surface features this is mainly due to graphite cause passivation formed in process of intercalation for the first time
Film (Solid Electrolyte Interface, SEI) has inhomogeneities and brittleness.These shortcomings limit this cathode
Extensive use of the active material in lithium ion battery.
Carbon nanotubes (carbon nanotube, CNT) is a kind of new carbon-based material of discovered in recent years, by individual layer or
The graphite laminated structure of multilayer crimps.The interlamellar spacing of carbon nanotubes is 0.34 nanometer, slightly larger than the interlamellar spacing of graphite, favorably
In the insertion and abjection of lithium ion.Carbon nanotubes makees lithium ion battery negative material, and lithium ion can be not only embedded in hollow tube, and
And can be embedded among the gap of interlayer, hole, have many advantages, such as that insert depth is small, process is short, embedded location is more.However, mesh
The preceding negative electrode of lithium ion battery made of carbon nanotubes, is usually coated on current collection after mixing by carbon nanotubes and bonding agent
Extremely upper obtained battery cathode.Due to the influence of binding agent, it is impossible to sufficiently utilize the surface microporous structure of carbon nanotubes, this limitation
Adsorption capacity of the cathode to lithium ion.Moreover, it is low there is also first charge-discharge efficiency using the lithium ion battery of the cathode, it follows
Ring poor performance, and the shortcomings that electrolyte high selectivity.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of carbon nanotube lithium battery negative material and its preparation side
Method.
In order to achieve the above object, technical scheme is achieved by the following technical programs：
A kind of carbon nanotube lithium battery negative material, the carbon nanotube lithium battery negative material is by following heavy
The raw material of amount percentage is made：Negative material 70-90%, carbon nanotubes 6-9%, dispersant 0.5-5%, cetyl trimethyl
Ammonium bromide 2-5%, surplus are solvent.
Further, the carbon nanotubes is multi-walled carbon nanotube.
Further, the average diameter of the carbon nanotubes is 100-150 nanometers, and length is 16-20 microns.
Further, the solvent is one kind in water, ethyl alcohol, ethylene glycol, N-Methyl pyrrolidone, acetone.
Further, the dispersant is absolute ethyl alcohol.
A kind of preparation method of carbon nanotube lithium battery negative material, comprises the following steps：
S1, each raw material is weighed according to weight percent；
S2, it will be stirred evenly in cetyl trimethylammonium bromide addition solvent, add dispersant, stir, glue is made
Liquid；
S3, carbon nanotubes is prepared into carbon nano tube paste, by carbon nano tube paste, adds in glue made from step S2
In, slurry is made in stirring；
S4, positive electrode is added in slurry made from step S3, stirred evenly, discharged, you can.
The present invention provides a kind of carbon nanotube lithium battery negative material and preparation method thereof, excellent compared with prior art
Point is：
By the present invention in that with cetyl trimethylammonium bromide, dispersant, carbon nanotubes can be effectively promoted in slurry
In dispersiveness, while Stability of Slurry can be significantly improved, increase slurry solid content, cetyl trimethylammonium bromide plus
The reunion of carbon nanotubes can effectively be inhibited by entering, while reduce slurry viscosity under the conditions of identical solid content, improved slurry and stablized
Property, in addition the electric conductivity of the negative material and mechanical performance have obtained the promotion of bigger, due to electric conductivity and mechanical performance
Promotion, during as lithium ion battery negative material, cycle performance and rate charge-discharge performance, first charge-discharge efficiency all obtain
It is further to be promoted；
Carbon nanotube lithium battery negative material of the present invention, is added without binding agent, this is conducive to sufficiently receive using carbon
The surface microporous structure of mitron adsorbs more lithium ions.So the material preparation can effectively increase into during negative electrode of lithium ion battery
Add the embedded quantity of lithium ion, the stability of the passivating film formed in process of intercalation for the first time can be improved, and to the selection of electrolyte
Property is not high.In addition carbon nanotubes has excellent electric conductivity.Since carbon nano tube growth is uniform in carbon nano pipe array, carbon is received
Mitron is uniformly dispersed so that the material has preferable mechanical strength and toughness, and electric conductivity and mechanical performance have obtained bigger
Promotion.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, with reference to the embodiment of the present invention pair
Technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is a part of the invention
Embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making wound
All other embodiments obtained under the premise of the property made work, belong to the scope of protection of the invention.
Embodiment 1：
The present embodiment carbon nanotube lithium battery negative material is made of the raw material of following weight percent：Negative material
70%th, carbon nanotubes 6%, dispersant 0.5%, cetyl trimethylammonium bromide 2%, surplus are solvent；
Wherein, carbon nanotubes is multi-walled carbon nanotube；The average diameter of carbon nanotubes is 100 nanometers, and length is 16 microns；
Solvent is water；Dispersant is absolute ethyl alcohol；
The preparation method of the present embodiment carbon nanotube lithium battery negative material, comprises the following steps：
S1, each raw material is weighed according to weight percent；
S2, it will be stirred evenly in cetyl trimethylammonium bromide addition solvent, add dispersant, stir, glue is made
Liquid；
S3, carbon nanotubes is prepared into carbon nano tube paste, by carbon nano tube paste, adds in glue made from step S2
In, slurry is made in stirring；
S4, positive electrode is added in slurry made from step S3, stirred evenly, discharged, you can.
Embodiment 2：
The present embodiment carbon nanotube lithium battery negative material is made of the raw material of following weight percent：Negative material
90%th, carbon nanotubes 6%, dispersant 0.5%, cetyl trimethylammonium bromide 2%, surplus are solvent；
Wherein, carbon nanotubes is multi-walled carbon nanotube；The average diameter of carbon nanotubes is 150 nanometers, and length is 20 microns；
Solvent is ethyl alcohol；Dispersant is absolute ethyl alcohol；
The preparation method of the present embodiment carbon nanotube lithium battery negative material, comprises the following steps：
S1, each raw material is weighed according to weight percent；
S2, it will be stirred evenly in cetyl trimethylammonium bromide addition solvent, add dispersant, stir, glue is made
Liquid；
S3, carbon nanotubes is prepared into carbon nano tube paste, by carbon nano tube paste, adds in glue made from step S2
In, slurry is made in stirring；
S4, positive electrode is added in slurry made from step S3, stirred evenly, discharged, you can.
Embodiment 3：
The present embodiment carbon nanotube lithium battery negative material is made of the raw material of following weight percent：Negative material
75%th, carbon nanotubes 9%, dispersant 5%, cetyl trimethylammonium bromide 5%, surplus are solvent；
Wherein, carbon nanotubes is multi-walled carbon nanotube；The average diameter of carbon nanotubes is 120 nanometers, and length is 17 microns；
Solvent is N-Methyl pyrrolidone；Dispersant is absolute ethyl alcohol；
The preparation method of the present embodiment carbon nanotube lithium battery negative material, comprises the following steps：
S1, each raw material is weighed according to weight percent；
S2, it will be stirred evenly in cetyl trimethylammonium bromide addition solvent, add dispersant, stir, glue is made
Liquid；
S3, carbon nanotubes is prepared into carbon nano tube paste, by carbon nano tube paste, adds in glue made from step S2
In, slurry is made in stirring；
S4, positive electrode is added in slurry made from step S3, stirred evenly, discharged, you can.
Embodiment 4：
The present embodiment carbon nanotube lithium battery negative material is made of the raw material of following weight percent：Negative material
85%th, carbon nanotubes 7%, dispersant 1%, cetyl trimethylammonium bromide 3%, surplus are solvent；
Wherein, carbon nanotubes is multi-walled carbon nanotube；The average diameter of carbon nanotubes is 140 nanometers, and length is 19 microns；
Solvent is ethylene glycol；Dispersant is absolute ethyl alcohol；
The preparation method of the present embodiment carbon nanotube lithium battery negative material, comprises the following steps：
S1, each raw material is weighed according to weight percent；
S2, it will be stirred evenly in cetyl trimethylammonium bromide addition solvent, add dispersant, stir, glue is made
Liquid；
S3, carbon nanotubes is prepared into carbon nano tube paste, by carbon nano tube paste, adds in glue made from step S2
In, slurry is made in stirring；
S4, positive electrode is added in slurry made from step S3, stirred evenly, discharged, you can.
Embodiment 5：
The present embodiment carbon nanotube lithium battery negative material is made of the raw material of following weight percent：Negative material
76%th, carbon nanotubes 8%, dispersant 4%, cetyl trimethylammonium bromide 4%, surplus are solvent；
Wherein, carbon nanotubes is multi-walled carbon nanotube；The average diameter of carbon nanotubes is 130 nanometers, and length is 18 microns；
Solvent is acetone；Dispersant is absolute ethyl alcohol；
The preparation method of the present embodiment carbon nanotube lithium battery negative material, comprises the following steps：
S1, each raw material is weighed according to weight percent；
S2, it will be stirred evenly in cetyl trimethylammonium bromide addition solvent, add dispersant, stir, glue is made
Liquid；
S3, carbon nanotubes is prepared into carbon nano tube paste, by carbon nano tube paste, adds in glue made from step S2
In, slurry is made in stirring；
S4, positive electrode is added in slurry made from step S3, stirred evenly, discharged, you can.
It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although ginseng
The present invention is described in detail according to previous embodiment, it will be understood by those of ordinary skill in the art that：It still can be with
It modifies to the technical solution recorded in foregoing embodiments or equivalent substitution is carried out to which part technical characteristic；And
These modifications are replaced, and the essence of appropriate technical solution is not made to depart from the spirit and model of various embodiments of the present invention technical solution
It encloses.
Claims (6)
- A kind of 1. carbon nanotube lithium battery negative material, which is characterized in that the carbon nanotube lithium battery cathode material Material is made of the raw material of following weight percent：Negative material 70-90%, carbon nanotubes 6-9%, dispersant 0.5-5%, 16 Alkyl trimethyl ammonium bromide 2-5%, surplus are solvent.
- 2. carbon nanotube lithium battery negative material according to claim 1, it is characterised in that：The carbon nanotubes is Multi-walled carbon nanotube.
- 3. carbon nanotube lithium battery negative material according to claim 2, it is characterised in that：The carbon nanotubes Average diameter is 100-150 nanometers, and length is 16-20 microns.
- 4. carbon nanotube lithium battery negative material according to claim 1, it is characterised in that：The solvent for water, One kind in ethyl alcohol, ethylene glycol, N-Methyl pyrrolidone, acetone.
- 5. carbon nanotube lithium battery negative material according to claim 1, it is characterised in that：The dispersant is nothing Water-ethanol.
- 6. a kind of preparation method of the carbon nanotube lithium battery negative material as described in claim 1-5 is any, feature exist In comprising the following steps：S1, each raw material is weighed according to weight percent；S2, it will be stirred evenly in cetyl trimethylammonium bromide addition solvent, add dispersant, stir, glue is made；S3, carbon nanotubes is prepared into carbon nano tube paste, by carbon nano tube paste, adds in glue made from step S2, stir It mixes, slurry is made；S4, positive electrode is added in slurry made from step S3, stirred evenly, discharged, you can.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115312775A (en) * | 2022-07-27 | 2022-11-08 | 江西盛源新材料有限公司 | Carbon nanotube composite conductive slurry and preparation method thereof |
| CN116504985A (en) * | 2023-06-28 | 2023-07-28 | 深圳海辰储能控制技术有限公司 | Positive plate, preparation method thereof, energy storage equipment and electric equipment |
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| CN101969112A (en) * | 2010-09-30 | 2011-02-09 | 湛江市聚鑫新能源有限公司 | Anode material and cathode material for lithium ion battery and modifying method thereof |
| CN102714306A (en) * | 2010-01-15 | 2012-10-03 | 丰田自动车株式会社 | Method for manufacturing composite positive electrode active material |
| CN106532045A (en) * | 2015-09-15 | 2017-03-22 | 宁德新能源科技有限公司 | Graphite negative electrode material of lithium ion battery and preparation method for graphite negative electrode material |
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2017
- 2017-12-27 CN CN201711448393.2A patent/CN108075136A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102714306A (en) * | 2010-01-15 | 2012-10-03 | 丰田自动车株式会社 | Method for manufacturing composite positive electrode active material |
| CN101969112A (en) * | 2010-09-30 | 2011-02-09 | 湛江市聚鑫新能源有限公司 | Anode material and cathode material for lithium ion battery and modifying method thereof |
| CN106532045A (en) * | 2015-09-15 | 2017-03-22 | 宁德新能源科技有限公司 | Graphite negative electrode material of lithium ion battery and preparation method for graphite negative electrode material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115312775A (en) * | 2022-07-27 | 2022-11-08 | 江西盛源新材料有限公司 | Carbon nanotube composite conductive slurry and preparation method thereof |
| CN116504985A (en) * | 2023-06-28 | 2023-07-28 | 深圳海辰储能控制技术有限公司 | Positive plate, preparation method thereof, energy storage equipment and electric equipment |
| CN116504985B (en) * | 2023-06-28 | 2024-02-20 | 深圳海辰储能控制技术有限公司 | Positive plate, preparation method thereof, energy storage equipment and electric equipment |
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