CN103545512A - Lithium iron phosphate cathode material for high-power lithium battery and preparation method of lithium iron phosphate cathode material - Google Patents
Lithium iron phosphate cathode material for high-power lithium battery and preparation method of lithium iron phosphate cathode material Download PDFInfo
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- CN103545512A CN103545512A CN201310523639.3A CN201310523639A CN103545512A CN 103545512 A CN103545512 A CN 103545512A CN 201310523639 A CN201310523639 A CN 201310523639A CN 103545512 A CN103545512 A CN 103545512A
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- powder
- iron phosphate
- lithium iron
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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
- H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
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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
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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
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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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 & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a lithium iron phosphate cathode material for a high-power lithium battery. The lithium iron phosphate cathode material for the high-power lithium battery is characterized by being prepared from the following raw materials in parts by weight: 500 parts of lithium iron phosphate, 4 to 5 parts of aluminum nitride powder, 2 to 3 parts of stearic acid monoglyceride, 3 to 4 parts of soybean oil, 3 to 4 parts of montmorillonite powder, 4 to 5 parts of modified silver powder and a proper amount of water. The modified silver powder is added, so the conductivity of the material is improved, growth of a crystal is effectively inhibited and the uniformly dispersed lithium iron phosphate material is obtained. The lithium iron phosphate cathode material has large discharge capacity, guarantees the industrialization consistency and the cruising capability of power batteries, is low in price and non-toxic, avoids environmental pollution, and meets the high-power power requirement.
Description
Technical field
The present invention relates to chemical energy source Material Field, particularly lithium iron phosphate positive material and preparation method thereof for a kind of high-power lithium battery.
Background technology
Iron phosphate lithium electrode material is mainly used in various lithium ion batteries.With traditional lithium ion secondary battery anode material, the LiMn of spinel structure
2the LiCoO of O4 and layer structure
2compare LiMPO
4raw material source more extensively, price is cheaper and non-environmental-pollution.Currently available technology, LiFePO4 has its unique advantage as a kind of anode material for lithium-ion batteries: the theoretical specific capacity 170mAh/g that (1) is relatively high; (2) good thermal stability and chemical stability; (3) low cost, the security performance that hypotoxicity is become reconciled; (4) have extended cycle life.But because LiFePO4 exists the low and low defect of lithium ion conductivity of conductivity, thus cause the poor performance at low temperatures of battery and multiplying power discharging property poor.
Summary of the invention
The object of this invention is to provide lithium iron phosphate positive material and preparation method thereof for a kind of high-power lithium battery.
In order to realize object of the present invention, the present invention passes through following scheme implementation:
A lithium iron phosphate positive material, is made by the raw material of following weight portion: LiFePO4 500, aluminum nitride powder 4-5, stearic acid monoglyceride 2-3, soybean oil 3-4, montmorillonite powder 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, tapioca 1-2, bauxite 2-3, diatomite 2-3, methyl triethoxysilane 1-2, carborundum 2-3, aluminium nitride 1-2, ZnO1-2, Nb
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 510-530 ℃ sintering 2-3 hour and get final product.
High-power lithium battery lithium iron phosphate positive 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, improved material conductivity, and effectively suppress growing up of crystal, obtain homodisperse LiFePO 4 material; Discharge capacity of the present invention is large, has guaranteed that consistency and the flying power of electrokinetic cell industrialization is cheap, and nontoxicity, does not cause environmental pollution, is applicable to high-power power demand.
Embodiment
Below by instantiation, the present invention is described in detail.
The LiFePO 4 material that this example adopts preparation method's patented technology of 201010226073.4 1 kinds of lithium iron phosphate nano materials to prepare.
A lithium iron phosphate positive material, by following weight portion (kilogram) raw material make: LiFePO4 500, aluminum nitride powder 4, stearic acid monoglyceride 2, soybean oil 3, montmorillonite powder 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 2, tapioca 2, bauxite 2, diatomite 3, methyl triethoxysilane 1, carborundum 2, aluminium nitride 1, ZnO1, Nb
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 510-530 ℃ sintering 2-3 hour and get final product.
High-power lithium battery lithium iron phosphate positive 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 iron phosphate positive material of the present invention, its first discharge capacity reach 167mAh/g; The relative lithium electrode current potential of its charge and discharge platform is about 3.5V, and initial discharge capacity surpasses 177mAh/g, capacity 2.7% left and right of approximately decaying after 100 charge and discharge cycles.
Claims (2)
1. a high-power lithium battery lithium iron phosphate positive material, it is characterized in that, by the raw material of following weight portion, made: LiFePO4 500, aluminum nitride powder 4-5, stearic acid monoglyceride 2-3, soybean oil 3-4, montmorillonite powder 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, tapioca 1-2, bauxite 2-3, diatomite 2-3, methyl triethoxysilane 1-2, carborundum 2-3, aluminium nitride 1-2, ZnO1-2, Nb
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 510-530 ℃ sintering 2-3 hour and get final product.
2. high-power lithium battery lithium iron phosphate positive 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)
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CN201310523639.3A CN103545512A (en) | 2013-10-30 | 2013-10-30 | Lithium iron phosphate cathode material for high-power lithium battery and preparation method of lithium iron phosphate cathode material |
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CN201310523639.3A CN103545512A (en) | 2013-10-30 | 2013-10-30 | Lithium iron phosphate cathode material for high-power lithium battery and preparation method of lithium iron phosphate cathode material |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1736636A (en) * | 2005-09-12 | 2006-02-22 | 昆明理工恒达科技有限公司 | Low loose density sheet-like silver powder preparation method |
CN101162776A (en) * | 2007-10-26 | 2008-04-16 | 深圳市贝特瑞新能源材料股份有限公司 | Lithium iron phosphate suitable for high multiplying power electrokinetic cell and method for producing the same |
CN102414876A (en) * | 2009-04-24 | 2012-04-11 | 大日本印刷株式会社 | Electrode plate for nonaqueous electrolyte secondary battery, method for producing electrode plate for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery |
-
2013
- 2013-10-30 CN CN201310523639.3A patent/CN103545512A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1736636A (en) * | 2005-09-12 | 2006-02-22 | 昆明理工恒达科技有限公司 | Low loose density sheet-like silver powder preparation method |
CN101162776A (en) * | 2007-10-26 | 2008-04-16 | 深圳市贝特瑞新能源材料股份有限公司 | Lithium iron phosphate suitable for high multiplying power electrokinetic cell and method for producing the same |
CN102414876A (en) * | 2009-04-24 | 2012-04-11 | 大日本印刷株式会社 | Electrode plate for nonaqueous electrolyte secondary battery, method for producing electrode plate for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery |
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