CN109244425A - A kind of preparation method of nano-silicone wire/carbon material and its application in lithium battery - Google Patents
A kind of preparation method of nano-silicone wire/carbon material and its application in lithium battery Download PDFInfo
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- CN109244425A CN109244425A CN201811285848.8A CN201811285848A CN109244425A CN 109244425 A CN109244425 A CN 109244425A CN 201811285848 A CN201811285848 A CN 201811285848A CN 109244425 A CN109244425 A CN 109244425A
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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
- H01M4/366—Composites as layered products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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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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- 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
- H01M4/386—Silicon or alloys based on silicon
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
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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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
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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
Abstract
The present invention discloses a kind of preparation method of nano-silicone wire/carbon material and its application in lithium battery, comprising the following steps: (1) chooses carbon source and silicon powder by the weight ratio of 1:5 and mix；(2) solvent is added in mixed powder and dispersing agent carries out circulation ball milling；(3) mixed slurry is obtained after the slurry after step (2) ball milling being rejoined solvent and dispersing agent progress secondary ball milling；(4) mixed slurry is dried, breaks up to obtain semi-finished product powder after dry；(5) double of finished product powder are sintered, and crush sintering feed after sintering, are broken up after crushing to Nano grade to get nano-silicone wire/carbon material.Using the lithium battery of the cathode of nano-silicone wire/carbon material of the present invention preparation, it is evenly coated, the advantages that dispersion performance is good, and battery capacity is high, while its preparation process is at low cost, it is easy to accomplish mass large-scale production, it is with good economic efficiency.
Description
Technical field
The invention belongs to novel energy resource material technology fields, and in particular to a kind of preparation method of nano-silicone wire/carbon material and its
The application of lithium battery.
Background technique
In order to further increase the energy density and power density of lithium ion battery, develop the positive and negative anodes material of height ratio capacity
Material is its key point.For positive electrode, all oneself passes through the materials such as common LiFePO4, cobalt acid lithium, ternary nickle cobalt lithium manganate
Develop quite mature, it is relatively difficult that capacity further realizes biggish breakthrough.For this purpose, using the negative electrode material generation of height ratio capacity
For traditional graphite cathode, mitigate the load capacity of negative electrode material in battery, it has also become improve lithium ion battery energy density and function
The maximally efficient method of rate density.
Currently, the common negative electrode material of lithium ion battery have carbon negative pole material (including graphite, soft carbon and hard carbon) and
Li4Ti5O12, but their gram volume room for promotion is all very limited, is unfavorable for the design of lithium ion battery with high energy density
And exploitation.In recent years, with the extensive concern of academia and research, the Si in current negative electrode of lithium ion battery system is found
More lithium alloys can be formed with Li and there is the theoretical specific capacity (4200mAh/g) more much higher than graphite, further design structure
Reasonable Si-C composite material can improve electrical contact and electronic conductivity, improve capacity of lithium ion battery and cyclical stability
Can, it can preferably alleviate the huge volume deformation of silicon materials during circulating battery, safety is good.Therefore, nano-silicone wire/carbon material
It is accepted extensively due to its unique chemical property advantage by industry, is known as the ideal of next-generation lithium ion battery negative material
Selection.
In designing and developing in link for nano-silicone wire/carbon composite material, the nano silicon material of uniform particle diameter, good dispersion is obtained
It is particularly critical, and nano silicon material on the market is substantially pure phase nanometer silicon at present, electronic conductivity is low, and dispersion performance is poor, powder
Body partial size is inhomogenous, and manufacturing cost is high, and that these features lead to lithium battery silicon carbon anode material there is electronic conductance performances is poor, divides
The problems such as property is poor, cladding is uneven is dissipated, the electrochemistry such as stable circulation performance, the forthright again and efficiency of lithium battery product are seriously affected
Index.
Summary of the invention
The technical problems to be solved by the invention are in view of the above shortcomings of the prior art, to provide a kind of nano-silicon carbon materials
The preparation method of material and its application in lithium battery, the nano-silicone wire/carbon material are evenly coated, and have good dispersibility, and capacity
The negative electrode of lithium ion battery of height, nano-silicone wire/carbon material preparation has good ionic conductivity and dispersibility.
The technical scheme adopted by the invention is that: a kind of preparation method of nano-silicone wire/carbon material, comprising the following steps:
(1) carbon source and silicon powder are chosen by the weight ratio of 1:5, obtains mixed powder for being uniformly mixed in carbon source addition silicon powder；
(2) mixed powder is added in solvent by solid-to-liquid ratio 1:30, while dispersing agent is added, high speed dispersion is after mixing
Circulation ball milling is carried out, the temperature of ball milling is 50-60 DEG C, and Ball-milling Time is 6-10 hours；
(3) slurry after step (2) ball milling is rejoined into solvent and dispersing agent carries out secondary ball milling, ball milling temperature is
50-80 DEG C, Ball-milling Time is 8-10 hours, and mixed slurry is obtained after secondary ball milling；
(4) mixed slurry is dried, it is dry to be broken up to water content less than 1000ppm, then by the grounds travel after drying
Obtain semi-finished product powder；
(5) double of finished product powder are sintered, and sintering temperature is controlled at 600-1000 DEG C, and sintering protective atmosphere is hydrogen
Inert gas, sintering time control at 4-12 hours, sintering feed is crushed after sintering, is broken up after crushing to nanoscale
Not to get nano-silicone wire/carbon material.
Preferably, the silicon powder selects 0.1-50 micron of the thick silicon of powder, then by the thick silicon of powder pass through air-flow crushing at
The silicon powder that partial size is 2-5 microns.
Preferably, the carbon source includes graphite, graphene oxide, resin, cellulose, pitch, hard carbon, one in soft carbon
Kind is a variety of.
Preferably, the solvent is water, alcohol, ethylene glycol, glycerol, polyvinylpyrrolidone, acetone, hexamethylene, fourth
In ketone, butanol, one of benzene class or a variety of.
Preferably, the dispersing agent is dodecyl benzene sulfonic acid class, urea, sodium polyphosphate, silicates, poly- second two
Alcohol, sodium carboxymethylcellulose, seaweed acids, polyacrylic, polyvinylpyrrolidone, sulfomethylated lignin acids, in sodium humate
It is one or more.
Preferably, a kind of lithium battery for preparing cathode using nano-silicone wire/carbon material described in claim 1.
The beneficial effects of the present invention are: the lithium battery of the cathode of nano-silicone wire/carbon material of the present invention preparation is used,
The advantages that it is evenly coated, and dispersion performance is good, and battery capacity is high, while its preparation process is at low cost, it is easy to accomplish mass is big
Large-scale production, it is with good economic efficiency.
Specific embodiment
Below in conjunction with specific embodiment, invention is further described in detail.
Embodiment 1
The preparation method of nano-silicone wire/carbon material provided in this embodiment, comprising the following steps:
(1) carbon source and silicon powder are chosen by the weight ratio of 1:5, obtains mixed powder for being uniformly mixed in carbon source addition silicon powder；
(2) mixed powder is added in solvent by solid-to-liquid ratio 1:30, while dispersing agent is added, high speed dispersion is after mixing
Circulation ball milling is carried out, the temperature of ball milling is 50-60 DEG C, and Ball-milling Time is 6-10 hours；
(3) slurry after step (2) ball milling is rejoined into solvent and dispersing agent carries out secondary ball milling, ball milling temperature is
50-80 DEG C, Ball-milling Time is 8-10 hours, and mixed slurry is obtained after secondary ball milling；
(4) mixed slurry is dried, it is dry to be broken up to water content less than 1000ppm, then by the grounds travel after drying
Obtain semi-finished product powder；
(5) double of finished product powder are sintered, and sintering temperature is controlled at 600-1000 DEG C, and sintering protective atmosphere is hydrogen
Inert gas, sintering time control at 4-12 hours, sintering feed is crushed after sintering, is broken up after crushing to nanoscale
Not to get nano-silicone wire/carbon material.
In above-described embodiment, the silicon powder selects 0.1-50 microns of the thick silicon of powder, then the thick silicon of powder is passed through air-flow powder
It is broken into the silicon powder that partial size is 2-5 microns.
In above-described embodiment, the carbon source include graphite, graphene oxide, resin, cellulose, pitch, hard carbon, in soft carbon
It is one or more.
In above-described embodiment, the solvent is water, alcohol, ethylene glycol, glycerol, polyvinylpyrrolidone, acetone, hexamethylene
Alkane, butanone, in butanol, one of benzene class or a variety of.
In above-described embodiment, the dispersing agent is dodecyl benzene sulfonic acid class, urea, sodium polyphosphate, silicates, gathers
Ethylene glycol, sodium carboxymethylcellulose, seaweed acids, polyacrylic, polyvinylpyrrolidone, sulfomethylated lignin acids, humic acid
One of sodium is a variety of.
Embodiment 2
A kind of lithium battery preparing cathode using nano-silicone wire/carbon material described in embodiment 1.
The above is only the preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, any
The transformation and replacement carried out based on technical solution provided by the present invention and inventive concept should all be covered in protection model of the invention
In enclosing.
Claims (6)
1. a kind of preparation method of nano-silicone wire/carbon material, it is characterised in that: the following steps are included:
(1) carbon source and silicon powder are chosen by the weight ratio of 1:5, obtains mixed powder for being uniformly mixed in carbon source addition silicon powder；
(2) mixed powder is added in solvent by solid-to-liquid ratio 1:30, while dispersing agent is added, high speed dispersion carries out after mixing
Ball milling is recycled, the temperature of ball milling is 50-60 DEG C, and Ball-milling Time is 6-10 hours；
(3) slurry after step (2) ball milling is rejoined into solvent and dispersing agent carries out secondary ball milling, ball milling temperature is 50-80
DEG C, Ball-milling Time is 8-10 hours, and mixed slurry is obtained after secondary ball milling；
(4) mixed slurry is dried, it is dry to break up to obtain less than 1000ppm, then by the grounds travel after drying to water content
Semi-finished product powder；
(5) double of finished product powder are sintered, and sintering temperature is controlled at 600-1000 DEG C, and sintering protective atmosphere is the lazy of hydrogen
Property gas, sintering feed crushes at 4-12 hours, after sintering, broken up after crushing to Nano grade by sintering time control, i.e.,
Obtain nano-silicone wire/carbon material.
2. a kind of preparation method of nano-silicone wire/carbon material according to claim 1, it is characterised in that: the silicon powder is selected
The thick silicon of 0.1-50 microns of powder, then the silicon powder for being 2-5 microns at partial size by air-flow crushing by the thick silicon of powder.
3. a kind of preparation method of nano-silicone wire/carbon material according to claim 1, it is characterised in that: the carbon source includes stone
One of ink, graphene oxide, resin, cellulose, pitch, hard carbon, soft carbon are a variety of.
4. a kind of preparation method of nano-silicone wire/carbon material according to claim 1, it is characterised in that: the solvent be water,
Alcohol, ethylene glycol, glycerol, polyvinylpyrrolidone, acetone, hexamethylene, butanone, in butanol, one of benzene class or a variety of.
5. a kind of preparation method of nano-silicone wire/carbon material according to claim 1, it is characterised in that: the dispersing agent is ten
Dialkyl benzene sulfonic acids class, urea, sodium polyphosphate, silicates, polyethylene glycol, sodium carboxymethylcellulose, seaweed acids, poly- third
One of olefin(e) acid class, polyvinylpyrrolidone, sulfomethylated lignin acids, sodium humate are a variety of.
6. a kind of lithium battery for preparing cathode using nano-silicone wire/carbon material described in claim 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811285848.8A CN109244425A (en) | 2018-10-31 | 2018-10-31 | A kind of preparation method of nano-silicone wire/carbon material and its application in lithium battery |
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| CN201811285848.8A CN109244425A (en) | 2018-10-31 | 2018-10-31 | A kind of preparation method of nano-silicone wire/carbon material and its application in lithium battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649254A (en) * | 2019-09-06 | 2020-01-03 | 成都新柯力化工科技有限公司 | Lithium battery silicon-carbon negative electrode composite material and preparation method thereof |
| CN111584868A (en) * | 2019-02-15 | 2020-08-25 | 株式会社村田制作所 | Lithium ion secondary battery negative electrode additive and negative electrode slurry containing same |
| CN114933299A (en) * | 2022-06-14 | 2022-08-23 | 西安交通大学苏州研究院 | Functionalized modified graphene oxide, preparation method and application |
| CN117133907B (en) * | 2023-10-26 | 2024-01-26 | 琥崧智能装备(太仓)有限公司 | Carbon-coated silicon composite material and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655570A (en) * | 2016-04-01 | 2016-06-08 | 四川创能新能源材料有限公司 | Refining preparation method of nanoscale silicon powder material |
| CN106816586A (en) * | 2016-11-26 | 2017-06-09 | 佛山市尚好门窗有限责任公司 | A kind of composite of silicon native graphite bitumencarb and preparation method thereof |
-
2018
- 2018-10-31 CN CN201811285848.8A patent/CN109244425A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655570A (en) * | 2016-04-01 | 2016-06-08 | 四川创能新能源材料有限公司 | Refining preparation method of nanoscale silicon powder material |
| CN106816586A (en) * | 2016-11-26 | 2017-06-09 | 佛山市尚好门窗有限责任公司 | A kind of composite of silicon native graphite bitumencarb and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111584868A (en) * | 2019-02-15 | 2020-08-25 | 株式会社村田制作所 | Lithium ion secondary battery negative electrode additive and negative electrode slurry containing same |
| CN111584868B (en) * | 2019-02-15 | 2023-07-25 | 株式会社村田制作所 | Negative electrode additive for lithium ion secondary battery and negative electrode slurry containing same |
| CN110649254A (en) * | 2019-09-06 | 2020-01-03 | 成都新柯力化工科技有限公司 | Lithium battery silicon-carbon negative electrode composite material and preparation method thereof |
| CN114933299A (en) * | 2022-06-14 | 2022-08-23 | 西安交通大学苏州研究院 | Functionalized modified graphene oxide, preparation method and application |
| CN117133907B (en) * | 2023-10-26 | 2024-01-26 | 琥崧智能装备(太仓)有限公司 | Carbon-coated silicon composite material and preparation method and application thereof |
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