CN103545500A - Surface-modified composite lithium titanate anode material and preparation method thereof - Google Patents
Surface-modified composite lithium titanate anode material and preparation method thereof Download PDFInfo
- Publication number
- CN103545500A CN103545500A CN201310523587.XA CN201310523587A CN103545500A CN 103545500 A CN103545500 A CN 103545500A CN 201310523587 A CN201310523587 A CN 201310523587A CN 103545500 A CN103545500 A CN 103545500A
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- Prior art keywords
- lithium titanate
- powder
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- silver powder
- anode material
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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
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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
- H01M4/364—Composites as mixtures
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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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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a surface-modified composite lithium titanate anode material. The surface-modified composite lithium titanate anode material is characterized by being prepared from the following raw materials in parts by weight: 400 parts of lithium titanate, 3 to 4 parts of niobium pentoxide, 3 to 4 parts of castor oil, 1 to 2 parts of silver nitrate, 3 to 4 parts of disodium hydrogen phosphate, 4 to 5 parts of modified silver powder and a proper amount of water. The modified silver powder is added, so that the surface-modified composite lithium titanate anode material has excellent battery dynamic performance, cycling performance and high-rate charge/discharge capacity, and the performance of a lithium ion battery which takes the material as an anode material is improved. The surface-modified composite lithium titanate anode material has the advantages of no toxicity, no pollution, excellent safety performance, wide sources and low price of raw materials, long life and the like, and is suitable for industrialized production.
Description
Technical field
The present invention relates to chemical energy source Material Field, particularly a kind of surface modification composite lithium titanate negative material and preparation method thereof.
Background technology
As lithium ion battery negative material-lithium titanate, due to high security, high stability, long-life and the environmental protection of lithium titanate, become the negative material of lithium ion battery of new generation and be widely used in new-energy automobile, battery-operated motor cycle and require high security, high stability and macrocyclic application.(1) it is zero strain material, good cycle (2) discharging voltage balance, and also electrolyte is unlikely decomposes, and improves lithium battery security performance; (3) compare with carbon cathode material, lithium titanate has high lithium ion diffusion coefficient, can high power charging-discharging etc. the electromotive force of (4) lithium titanate than the height of pure metal lithium, be difficult for producing lithium dendrite arm, for ensureing that the safety of lithium battery provides the foundation.But also have certain shortcoming, for example the lithium-ion-power cell energy density of other types can be lower relatively; The lithium-ion-power cell of other types is on the high side relatively; Battery consistency still there are differences etc., need further research and development.
Summary of the invention
The object of this invention is to provide a kind of surface modification composite lithium titanate negative material and preparation method thereof.
In order to realize object of the present invention, the present invention passes through following scheme implementation:
A composite lithium titanate negative material, is made by the raw material of following weight portion: lithium titanate 400, niobium pentaoxide 3-4, castor oil 3-4, silver nitrate 1-2, sodium hydrogen phosphate 3-4, modification silver powder 4-5, water are appropriate;
Described modification silver powder is made by the raw material of following weight portion: silver powder 100, nano-sized carbon 1-2, kaolin powder 1-2, inositol hexaphosphate 2-3, borax 1-2, silica flour 1-2, aminopropyl triethoxysilane 1-2, Fe
3o
42-3, SnO
21-2, V
2o
51-2; Each raw material is mixed, be heated to 50-55 ℃, grind 1-2 hour, be uniformly dispersed into powder, send in calciner at 550-580 ℃ sintering 2-3 hour and get final product.
Surface modification composite lithium titanate negative material of the present invention, by following concrete steps, made: other raw material except modification silver powder is mixed, add suitable quantity of water, grind and within 2-3 hour, obtain 200-400 order slurry, spraying is dry, after oven dry, mix with modification silver powder, add the Tissuemat E powder that is equivalent to powder total weight 2-3%, stir, under 10-15Mpa pressure, be pressed into base, put into calciner and calcine 4-5 hour at 720-750 ℃, take out, cooling, be ground into 300-400 order powder.
The invention has the beneficial effects as follows: the present invention adds modification silver powder, make it there is good battery power and learn performance, cycle performance and high power charging-discharging capacity, thereby improved, using the performance of lithium ion battery of this material as negative material; The advantages such as that the present invention has is nontoxic, pollution-free, security performance is good, raw material wide material sources, low price, and the life-span is long, are applicable to industrialized production.
Embodiment
Below by instantiation, the present invention is described in detail.
A composite lithium titanate negative material, by following weight portion (kilogram) raw material make: lithium titanate 400, niobium pentaoxide 3, castor oil 3, silver nitrate 1, sodium hydrogen phosphate 3, modification silver powder 4, water are appropriate;
Described modification silver powder by following weight portion (kilogram) raw material make: silver powder 100, nano-sized carbon 1, kaolin powder 1, inositol hexaphosphate 2, borax 2, silica flour 1, aminopropyl triethoxysilane 1, Fe
3o
43, SnO
21, V
2o
51; Each raw material is mixed, be heated to 50-55 ℃, grind 1-2 hour, be uniformly dispersed into powder, send in calciner at 550-580 ℃ sintering 2-3 hour and get final product.
Surface modification composite lithium titanate negative material of the present invention, by following concrete steps, made: other raw material except modification silver powder is mixed, add suitable quantity of water, grind and within 2-3 hour, obtain 200-400 order slurry, spraying is dry, after oven dry, mix with modification silver powder, add the Tissuemat E powder that is equivalent to powder total weight 2-3%, stir, under 10-15Mpa pressure, be pressed into base, put into calciner and calcine 4-5 hour at 720-750 ℃, take out, cooling, be ground into 300-400 order powder.
Lithium titanate material of the present invention, negative pole as lithium ion battery, the LiFePO 4 material of usining is assembled into cylindrical 14500 batteries as positive pole, employing LiFePO4 is excessive, according to lithium titanate meter of the present invention, and its initial charge specific capacity > 175mAh/g, specific discharge capacity > 160mAh/g, cycle performance is excellent, and its 10C multiplying power discharging specific capacity is greater than 130mAh/g, and its tap density is 0.9-1.5g/cm
3, specific area is 0.1-10m
2/ g, compacted density is 2.1-2.5g/cm
3, adhesive property is good, is applicable to large-scale production and application.
Claims (2)
1. a surface modification composite lithium titanate negative material, is characterized in that, by the raw material of following weight portion, is made: lithium titanate 400, niobium pentaoxide 3-4, castor oil 3-4, silver nitrate 1-2, sodium hydrogen phosphate 3-4, modification silver powder 4-5, water are appropriate;
Described modification silver powder is made by the raw material of following weight portion: silver powder 100, nano-sized carbon 1-2, kaolin powder 1-2, inositol hexaphosphate 2-3, borax 1-2, silica flour 1-2, aminopropyl triethoxysilane 1-2, Fe
3o
42-3, SnO
21-2, V
2o
51-2; Each raw material is mixed, be heated to 50-55 ℃, grind 1-2 hour, be uniformly dispersed into powder, send in calciner at 550-580 ℃ sintering 2-3 hour and get final product.
2. surface modification composite lithium titanate negative material according to claim 1, it is characterized in that, by following concrete steps, made: other raw material except modification silver powder is mixed, add suitable quantity of water, grind and within 2-3 hour, obtain 200-400 order slurry, spraying is dry, after oven dry, mix with modification silver powder, add the Tissuemat E powder that is equivalent to powder total weight 2-3%, stir, under 10-15Mpa pressure, be pressed into base, put into calciner and calcine 4-5 hour at 720-750 ℃, take out, cooling, be ground into 300-400 order powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310523587.XA CN103545500A (en) | 2013-10-30 | 2013-10-30 | Surface-modified composite lithium titanate anode material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310523587.XA CN103545500A (en) | 2013-10-30 | 2013-10-30 | Surface-modified composite lithium titanate anode material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103545500A true CN103545500A (en) | 2014-01-29 |
Family
ID=49968740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310523587.XA Pending CN103545500A (en) | 2013-10-30 | 2013-10-30 | Surface-modified composite lithium titanate anode material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103545500A (en) |
-
2013
- 2013-10-30 CN CN201310523587.XA patent/CN103545500A/en active Pending
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140129 |
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| RJ01 | Rejection of invention patent application after publication |