CN110021741A - A kind of preparation method and material of Gao Shouxiao lithium ion battery negative material - Google Patents
A kind of preparation method and material of Gao Shouxiao lithium ion battery negative material Download PDFInfo
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- CN110021741A CN110021741A CN201910255165.6A CN201910255165A CN110021741A CN 110021741 A CN110021741 A CN 110021741A CN 201910255165 A CN201910255165 A CN 201910255165A CN 110021741 A CN110021741 A CN 110021741A
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- Prior art keywords
- ion battery
- lithium ion
- battery negative
- silicon
- preparation
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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
-
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
-
- 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 provides a kind of preparation methods of Gao Shouxiao lithium ion battery negative material comprising: 1) sub- silicon will be aoxidized and mixed with sodium hydroxide, dehydrated alcohol is added afterwards, obtains mixed slurry；Wherein, the mass ratio of the material for aoxidizing sub- silicon and sodium hydroxide is 1: 1；2) mixed slurry is dried and obtains powder (A), drying temperature is 100-200 DEG C；3) by powder (A), high-temperature calcination obtains mixture in a nitrogen atmosphere, and calcination temperature is 800-1200 DEG C, and calcination time is 4-12 hours.The present invention also provides a kind of Gao Shouxiao lithium ion battery negative materials.The present invention reduces the consumption of elemental lithium while keeping and aoxidizing sub- silicon head efficiency compared to the prior art, significantly reduces the manufacturing cost of lithium ion battery.
Description
Technical field
The present invention relates to field of lithium ion battery, in particular to a kind of Gao Shouxiao lithium ion battery negative material
Preparation method and material.
Background technique
Silicon materials are with its higher theoretical specific capacity, it is considered to be a kind of most suitable lithium ion battery negative material.
Currently, exploitation silicon composite has become the focus and emphasis of research, silicon, carbon compound cathode materials or silicon, graphite, carbon are prepared
Composite negative pole material is mostly to be dispersed in organic matter using nano silica fume as raw material, then carry out high temperature cabonization processing, forms nucleocapsid
The silicon composite of structure.
Chinese patent CN201110275091.6 disclose a kind of lithium ion battery silicon monoxide composite cathode material and its
Preparation method will aoxidize sub- silicon high temperature sintering under an inert atmosphere, and generate silicon nanoparticle and amorphous silica, i.e., will
It aoxidizes sub- silicon and nano-silicon and silica is disproportionated by high-temperature process.The silica point generated by existing this method
Cloth can play buffer function in material outer layer, be conducive to the cracking for inhibiting material.However, the silica that this method obtains
It when applied to lithium ion battery, is easy to react generation lithium metasilicate with elemental lithium, to considerably increase lithium member in lithium ion battery
The consumption of element needs when preparation to add into elemental lithium, this is with regard to nothing in order to avoid the service life of lithium ion battery is affected
Doubt the manufacturing cost for increasing lithium ion battery.
Summary of the invention
It, can be in consideration of it, the present invention provides the preparation method and material of a kind of Gao Shouxiao lithium ion battery negative material
The consumption for efficiently reducing elemental lithium reduces the manufacturing cost of lithium ion battery.
On the one hand, the present invention provides a kind of preparation methods of Gao Shouxiao lithium ion battery negative material comprising:
1) sub- silicon will be aoxidized to mix with sodium hydroxide, dehydrated alcohol is added afterwards, obtains mixed slurry；Wherein, sub- silicon is aoxidized
The mass ratio of the material with sodium hydroxide is 1: 1；
2) mixed slurry is dried and obtains powder (A), drying temperature is 100-200 DEG C；
3) by powder (A), high-temperature calcination obtains mixture in a nitrogen atmosphere, and calcination temperature is 800-1200 DEG C, when calcining
Between be 4-12 hours.
Further, above-mentioned steps 1) in, mixed slurry is obtained by ball milling method.
Further, above-mentioned steps 2) in, drying temperature is 130-170 DEG C.
Further, above-mentioned steps 2) in, drying temperature is 150 DEG C.
Further, above-mentioned steps 3) in, calcination temperature is 900-1100 DEG C, and calcination time is 6-10 hours.
Further, above-mentioned steps 3) in, calcination temperature is 1000 DEG C, and calcination time is 8 hours.
On the other hand, the present invention provides a kind of Gao Shouxiao lithium ion battery negative materials comprising aoxidizes sub- silicon, hydrogen-oxygen
Change sodium mixing and dehydrated alcohol；Wherein, the mass ratio of the material for aoxidizing sub- silicon and sodium hydroxide is 1: 1.
The present invention mainly has the advantage that compared to the prior art
1) consumption for reducing elemental lithium significantly reduces the manufacturing cost of lithium ion battery；
2) the sub- silicon head efficiency of oxidation is maintained, excellent cycle performance is shown.
Specific embodiment
The exemplary embodiment of the disclosure is described in more detail below.Although showing the exemplary implementation of the disclosure
Example, it being understood, however, that may be realized in various forms the disclosure and should not be limited by the embodiments set forth herein.On the contrary,
These embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can communicate completely to the scope of the present disclosure
Those skilled in the art.
Embodiment one:
A kind of component for Gao Shouxiao lithium ion battery negative material that the present embodiment one provides includes: that the mass ratio of the material is 1:
1 oxidation Asia silicon and sodium hydroxide, and dehydrated alcohol is added thereto, solid content 5-95%.
The present embodiment one provide a kind of Gao Shouxiao lithium ion battery negative material preparation method the following steps are included:
1) the oxidation Asia silicon that the mass ratio of the material is 1: 1 is mixed with sodium hydroxide, dehydrated alcohol, the above-mentioned mixing of ball milling is added
Object obtains mixed slurry；
2) mixed slurry is dried and obtains powders A, wherein drying temperature is 100 DEG C；
3) by powders A, high-temperature calcination obtains mixture in a nitrogen atmosphere, wherein calcination temperature is 1200 DEG C, when calcining
Between be 12 hours.
Embodiment two:
Other are identical as above-described embodiment one, the difference is that, in the preparation method of the present embodiment two:
Drying temperature in step 2) is 130 DEG C；Calcination temperature in step 3) is 1100 DEG C, and calcination time is 10 small
When.
Embodiment three:
Other are identical as above-described embodiment one, the difference is that, in the preparation method of the present embodiment three:
Drying temperature in step 2) is 150 DEG C；Calcination temperature in step 3) is 1000 DEG C, and calcination time is 8 hours.
Example IV:
Other are identical as above-described embodiment one, the difference is that, in the preparation method of the present embodiment four:
Drying temperature in step 2) is 170 DEG C；Calcination temperature in step 3) is 900 DEG C, and calcination time is 6 hours.
Embodiment five:
Other are identical as above-described embodiment one, the difference is that, in the preparation method of the present embodiment five:
Drying temperature in step 2) is 200 DEG C；Calcination temperature in step 3) is 800 DEG C, and calcination time is 4 hours.
The Gao Shouxiao lithium ion battery negative material that embodiment one to five is synthesized is in 200mA g-1Current density under survey
Shown in the experimental data are shown in the following table after examination, corresponding comparison has been carried out with the prior art.
| Embodiment | First efficiency |
| 1 | 87.5% |
| 2 | 89.1% |
| 3 | 90.6% |
| 4 | 88.3% |
| 5 | 85.1% |
| The prior art | 66.6% |
To sum up, above-described embodiment mainly has the advantage that compared to the prior art
1) reduce the consumption to elemental lithium in positive electrode, significantly reduce the manufacturing cost of lithium ion battery；
2) the sub- silicon head efficiency of oxidation is maintained, excellent cycle performance is shown.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (7)
1. a kind of preparation method of Gao Shouxiao lithium ion battery negative material, it is characterised in that: include:
1) sub- silicon will be aoxidized to mix with sodium hydroxide, dehydrated alcohol is added afterwards, obtains mixed slurry；Wherein, the sub- silicon of the oxidation
The mass ratio of the material with the sodium hydroxide is 1: 1；
2) mixed slurry is dried and obtains solidfied material (A), drying temperature is 100-200 DEG C；
3) by powder (A), high-temperature calcination obtains mixture in a nitrogen atmosphere, and calcination temperature is 800-1200 DEG C, and calcination time is
4-12 hours.
2. a kind of preparation method of Gao Shouxiao lithium ion battery negative material according to claim 1, it is characterised in that: institute
It states in step 1), the mixed slurry is obtained by ball milling method.
3. a kind of preparation method of Gao Shouxiao lithium ion battery negative material according to claim 1, it is characterised in that: institute
It states in step 2), drying temperature is 130-170 DEG C.
4. a kind of preparation method of Gao Shouxiao lithium ion battery negative material according to claim 1, it is characterised in that: institute
It states in step 2), drying temperature is 150 DEG C.
5. a kind of preparation method of Gao Shouxiao lithium ion battery negative material according to claim 1, it is characterised in that: institute
It states in step 3), calcination temperature is 900-1100 DEG C, and calcination time is 6-10 hours.
6. a kind of preparation method of Gao Shouxiao lithium ion battery negative material according to claim 1, it is characterised in that: institute
It states in step 3), calcination temperature is 1000 DEG C, and calcination time is 8 hours.
7. a kind of Gao Shouxiao lithium ion battery negative material, it is characterised in that: including aoxidizing sub- silicon, sodium hydroxide and anhydrous second
Alcohol；Wherein, the sub- silicon and the mass ratio of the material of the sodium hydroxide of aoxidizing is 1: 1.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130280614A1 (en) * | 2012-04-19 | 2013-10-24 | Unist Academy-Industry Research Corporation | Silicon-Based Anode Active Material And Secondary Battery Comprising The Same |
| KR20140147448A (en) * | 2013-06-20 | 2014-12-30 | 서울대학교산학협력단 | Preparation method for porous SiO via self-template chemical etching and anode material for lithium rechargeable batteries containing the same material |
| CN104577066A (en) * | 2014-12-29 | 2015-04-29 | 南开大学 | Silicon oxide composite negative pole material for lithium ion secondary battery and preparation method thereof |
| CN108493438A (en) * | 2018-04-27 | 2018-09-04 | 天津巴莫科技股份有限公司 | A kind of lithium ion battery SiOxBase composite negative pole material and preparation method thereof |
-
2019
- 2019-03-30 CN CN201910255165.6A patent/CN110021741A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130280614A1 (en) * | 2012-04-19 | 2013-10-24 | Unist Academy-Industry Research Corporation | Silicon-Based Anode Active Material And Secondary Battery Comprising The Same |
| KR20140147448A (en) * | 2013-06-20 | 2014-12-30 | 서울대학교산학협력단 | Preparation method for porous SiO via self-template chemical etching and anode material for lithium rechargeable batteries containing the same material |
| CN104577066A (en) * | 2014-12-29 | 2015-04-29 | 南开大学 | Silicon oxide composite negative pole material for lithium ion secondary battery and preparation method thereof |
| CN108493438A (en) * | 2018-04-27 | 2018-09-04 | 天津巴莫科技股份有限公司 | A kind of lithium ion battery SiOxBase composite negative pole material and preparation method thereof |
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Application publication date: 20190716 |