CN102983314A - Coated Si-base composite material - Google Patents
Coated Si-base composite material Download PDFInfo
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- CN102983314A CN102983314A CN2012105360682A CN201210536068A CN102983314A CN 102983314 A CN102983314 A CN 102983314A CN 2012105360682 A CN2012105360682 A CN 2012105360682A CN 201210536068 A CN201210536068 A CN 201210536068A CN 102983314 A CN102983314 A CN 102983314A
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to a coated Si-base composite material which comprises a Si base material, wherein a carbon material and a carbon precursor are coated on the surface of the Si base material. The invention is characterized in that the material coated on the surface of the Si base material also comprises aluminum salt as an additive. The surface of the Si base material is coated with the carbon material carbon precursor, and the aluminum salt of organic acid or inorganic acid, which can be easily decomposed into aluminum oxide, is also added into the coating material as the additive, thereby lowering the irreversible capacity of the Si base material on the basis of high electrochemical capacity and favorable cycle performance, and greatly lowering the cost of the material.
Description
Technical field
The invention belongs to the lithium cell cathode material technical field, particularly relate to a kind of cladded type Si based composites.
Background technology
From the nineties in last century, Sony company uses lamella graphite to replace the metal Li of fail safe extreme difference, be successfully prepared since the lithium rechargeable battery that the first can fill, lithium ion battery is because of its high-energy-density, pollution-free, range of application has obtained develop rapidly, has expanded the fields such as electric tool, electric automobile to from mobile communication power supply, notebook computer, video camera etc.And the electrochemistry capacitance of existing carbon negative pole is on the low side, can not satisfy the further requirement to the portable secondary battery performance of development in science and technology.The Si material is because its electrochemical reversible capacity is high, and fail safe is good, and the advantages such as aboundresources have become the preferred material of ion secondary battery cathode material lithium.Si sill as lithium ion battery has high theoretical electrochemistry capacity.But the change in volume of Si sill in the Electrochemical lithiation process is excessive, and first charge-discharge efficiency is lower, seriously hinders the practical application of this electrode material.
In order to improve electrochemistry capacitance height and the cycle performance of Si material, people adopt several different methods, as pass through magnetron sputtering, chemical vapour deposition (CVD), the methods such as thermal evaporation prepare the Si nano thin-film, Si nano particle, Si nano wire etc., but said method has improved the cost of battery, and irreversible capacity is high.
Summary of the invention
Cost is low, irreversible capacity is low for the technical problem that exists in the solution known technology provides in the present invention, and electrochemistry capacitance is high and a kind of cladded type Si based composites of good cycle.
The technical scheme that the present invention takes is:
A kind of cladded type Si based composites comprises the Si sill, and Si sill surface is coated with the presoma of material with carbon element and carbon, is characterized in: also have the aluminium salt as additive in the surface coated material of described Si sill.
The present invention can also adopt following technical scheme:
The presoma of described Si sill, material with carbon element, carbon and the mass ratio of aluminium salt are 5-10:5-10:15-30:1-4.
Described aluminium salt comprises one or more mixture of phosphate, nitrate, oxalates, sulfate, acetate.
Described acetate comprises aluminium monoacetate, aluminium hydroxyacetate and aluminium acetate or contains one or more mixture of crystallization water salt.
Described Si sill is polycrystalline Si, single crystalline Si or its mixture; Described material with carbon element is a kind of in Delanium, native graphite, carbon fiber, hard carbon, the agraphitic carbon; The presoma of described carbon is asphalt material or carbonaceous organic material.
Described asphalt material is a kind of in high softening point bitumen, middle softening point asphalt, the low softening point asphalt.
Described carbonaceous organic material is a kind of in monosaccharide and disaccharide, the polysaccharide.
Advantage and good effect that the present invention has are:
Si sill of the present invention surface has not only coated the presoma of material with carbon element, carbon, the organic acid that easily is decomposed into aluminium oxide or inorganic acid aluminium salt also in clad material, have been added as additive, on the basis of electrochemistry capacitance height, good cycle, reduce the irreversible capacity of Si sill, significantly reduced the cost of material.
Description of drawings
Fig. 1 is first all electrochemistry cyclic process curve charts of the embodiment of the invention 1 material;
Fig. 2 is the electrochemistry cyclic process curve chart of the embodiment of the invention 1 material;
Fig. 3 is the electrochemistry cyclic process curve chart of the embodiment of the invention 2 materials.
Embodiment
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and cooperate accompanying drawing to be described in detail as follows:
A kind of cladded type Si based composites comprises the Si sill, and Si sill surface is coated with the presoma of material with carbon element and carbon.
Innovative point of the present invention is: also have the aluminium salt as additive in the surface coated material of described Si sill; The presoma of described Si sill, material with carbon element, carbon and the mass ratio of aluminium salt are 5-10:5-10:15-30:1-4; Described aluminium salt comprises one or more mixture of phosphate, nitrate, oxalates, sulfate, acetate; Described acetate comprises aluminium monoacetate, aluminium hydroxyacetate and aluminium acetate or contains one or more mixture of crystallization water salt; Described Si sill is polycrystalline Si, single crystalline Si or its mixture; Described material with carbon element is a kind of in Delanium, native graphite, carbon fiber, hard carbon, the agraphitic carbon; The presoma of described carbon is asphalt material or carbonaceous organic material; Described asphalt material is a kind of in high softening point bitumen, middle softening point asphalt, the low softening point asphalt; Described carbonaceous organic material is a kind of in monosaccharide and disaccharide, the polysaccharide.
The manufacturing process of cladded type Si based composites of the present invention:
⑴ with the 10g polycrystalline Si, 10g graphite, and 30g coal tar pitch and 2.5g aluminium hydroxyacetate mix, and 100ml ethanolic solution ball milling 30 hours, heating detached ethanolic solution, obtains uniform presoma;
⑵ place high temperature furnace with the presoma of gained, and the lower 5 ℃/min of argon gas atmosphere is warmed up to 900 ℃, and high temperature sintering 5h makes cladded type Si based composites after the natural cooling down.Obtain the electrochemistry cyclic process curve chart in the first all electrochemistry cyclic process curve charts and Fig. 2 among Fig. 1 through test, wherein " " represents charging capacity, and " ■ " represents discharge capacity; The first all efficient 78.6% of present embodiment cladded type Si based composites, tap density surpasses 1.0g/ml.
Another manufacturing process of cladded type Si based composites of the present invention:
⑴ with the 10g polycrystalline Si, 10g graphite, and 40g coal tar pitch and 4g aluminium hydroxyacetate mix, and 100ml ethanolic solution ball milling 30 hours, heating detached ethanolic solution, obtains uniform presoma;
⑵ place high temperature furnace with the presoma of gained, and the lower 5 ℃/min of argon gas atmosphere is warmed up to 900 ℃, and high temperature sintering 5h makes cladded type Si composite material after the natural cooling down.Obtain electrochemistry cyclic process curve chart among Fig. 3 through test, wherein " " represents charging capacity, and " ■ " represents discharge capacity; The first all efficient 74.7% of present embodiment cladded type Si based composites, tap density surpasses 1.0g/ml.
Learn that by test cladded type Si based composites of the present invention has also reduced Si sill irreversible capacity on the basis that significantly reduces cost, and has the characteristics such as electrochemistry capacitance height, good cycle, good processability.
Although the above is described the preferred embodiments of the present invention by reference to the accompanying drawings; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away from the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (7)
1. a cladded type Si based composites comprises the Si sill, and Si sill surface is coated with the presoma of material with carbon element and carbon, it is characterized in that: also have the aluminium salt as additive in the surface coated material of described Si sill.
2. a kind of cladded type Si based composites according to claim 1, it is characterized in that: the presoma of described Si sill, material with carbon element, carbon and the mass ratio of aluminium salt are 5-10:5-10:15-30:1-4.
3. a kind of cladded type Si based composites according to claim 1 and 2 is characterized in that: described aluminium salt comprises one or more mixture of phosphate, nitrate, oxalates, sulfate, acetate.
4. a kind of cladded type Si based composites according to claim 3 is characterized in that: described acetate comprises aluminium monoacetate, aluminium hydroxyacetate and aluminium acetate or contains one or more mixture of crystallization water salt.
5. a kind of cladded type Si based composites according to claim 1, it is characterized in that: described Si sill is polycrystalline Si, single crystalline Si or its mixture; Described material with carbon element is a kind of in Delanium, native graphite, carbon fiber, hard carbon, the agraphitic carbon; The presoma of described carbon is asphalt material or carbonaceous organic material.
6. a kind of cladded type Si based composites according to claim 5 is characterized in that: described asphalt material is a kind of in high softening point bitumen, middle softening point asphalt, the low softening point asphalt.
7. a kind of cladded type Si based composites according to claim 5 is characterized in that: described carbonaceous organic material is a kind of in monosaccharide and disaccharide, the polysaccharide.
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| CN2012105360682A CN102983314A (en) | 2012-12-10 | 2012-12-10 | Coated Si-base composite material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633387A (en) * | 2014-11-04 | 2016-06-01 | 中国电子科技集团公司第十八研究所 | Preparation method of silicon-based anode material |
| CN110931749A (en) * | 2019-12-06 | 2020-03-27 | 天津工业大学 | Aluminum oxide doped silicon/dual-carbon composite negative electrode material and preparation method thereof |
| US11005097B2 (en) | 2012-08-21 | 2021-05-11 | Kratos LLC | Group IVA functionalized particles and methods of use thereof |
| CN116207241A (en) * | 2023-05-06 | 2023-06-02 | 江苏正力新能电池技术有限公司 | Negative electrode material, preparation method thereof, negative electrode and lithium ion battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101969111A (en) * | 2010-09-30 | 2011-02-09 | 湛江市聚鑫新能源有限公司 | Silicon-carbon alloy cathode material for lithium ion batteries and preparation method thereof |
| CN102394288A (en) * | 2011-11-24 | 2012-03-28 | 深圳市贝特瑞新能源材料股份有限公司 | Silicon-carbon cathode material for lithium ion battery and manufacturing method thereof |
| US20120202112A1 (en) * | 2011-02-07 | 2012-08-09 | Gleb Nikolayevich Yushin | Stabilization of li-ion battery anodes |
-
2012
- 2012-12-10 CN CN2012105360682A patent/CN102983314A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101969111A (en) * | 2010-09-30 | 2011-02-09 | 湛江市聚鑫新能源有限公司 | Silicon-carbon alloy cathode material for lithium ion batteries and preparation method thereof |
| US20120202112A1 (en) * | 2011-02-07 | 2012-08-09 | Gleb Nikolayevich Yushin | Stabilization of li-ion battery anodes |
| CN102394288A (en) * | 2011-11-24 | 2012-03-28 | 深圳市贝特瑞新能源材料股份有限公司 | Silicon-carbon cathode material for lithium ion battery and manufacturing method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11005097B2 (en) | 2012-08-21 | 2021-05-11 | Kratos LLC | Group IVA functionalized particles and methods of use thereof |
| CN105633387A (en) * | 2014-11-04 | 2016-06-01 | 中国电子科技集团公司第十八研究所 | Preparation method of silicon-based anode material |
| CN110931749A (en) * | 2019-12-06 | 2020-03-27 | 天津工业大学 | Aluminum oxide doped silicon/dual-carbon composite negative electrode material and preparation method thereof |
| CN116207241A (en) * | 2023-05-06 | 2023-06-02 | 江苏正力新能电池技术有限公司 | Negative electrode material, preparation method thereof, negative electrode and lithium ion battery |
| CN116207241B (en) * | 2023-05-06 | 2023-07-25 | 江苏正力新能电池技术有限公司 | Negative electrode material, preparation method thereof, negative electrode and lithium ion battery |
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