CN103531795A - Lithium ion battery doped modified lithium iron phosphate positive electrode material and preparation method thereof - Google Patents

Lithium ion battery doped modified lithium iron phosphate positive electrode material and preparation method thereof Download PDF

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Publication number
CN103531795A
CN103531795A CN201310523489.6A CN201310523489A CN103531795A CN 103531795 A CN103531795 A CN 103531795A CN 201310523489 A CN201310523489 A CN 201310523489A CN 103531795 A CN103531795 A CN 103531795A
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CN
China
Prior art keywords
iron phosphate
powder
parts
silver powder
lithium iron
Prior art date
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Pending
Application number
CN201310523489.6A
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Chinese (zh)
Inventor
林彭桃君
蒋森
陈夕顺
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HEFEI HENGNENG NEW ENERGY TECHNOLOGY Co Ltd
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HEFEI HENGNENG NEW ENERGY TECHNOLOGY Co Ltd
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Priority to CN201310523489.6A priority Critical patent/CN103531795A/en
Publication of CN103531795A publication Critical patent/CN103531795A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • 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 ion battery doped modified lithium iron phosphate positive electrode material which is characterized in that the material is prepared from the raw materials of, by weight: 500 parts of lithium iron phosphate, 2-3 parts of ferric chloride, 3-4 parts of lithium acetate, 2-3 parts of gadolinium nitrate, 1-2 parts of nickel chloride, 4-5 parts of thiourea, 4-5 parts of strontium chloride, 4-5 parts of modification silver powder, and proper amount of water. According to the invention, modification silver powder is added, such that material conductivity is improved, and crystal growth is effectively inhibited, such that the uniformly dispersed lithium iron phosphate material is obtained. The doped modified lithium iron phosphate material has high energy density and circulation stability, such that the lithium ion battery has high specific capacity and service life. The material is cheap and nontoxic, and does not cause environment pollution.

Description

Doping vario-property lithium iron phosphate positive material and preparation method thereof for a kind of lithium battery
Technical field
The present invention relates to chemical energy source Material Field, particularly doping vario-property lithium iron phosphate positive material and preparation method thereof for a kind of 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 LiMn2O4 of spinel structure compares with the LiCoO2 of layer structure, and the raw material source of LiMPO4 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 doping vario-property lithium iron phosphate positive material and preparation method thereof for a kind of lithium battery.
In order to realize object of the present invention, the present invention passes through following scheme implementation:
Use a doping vario-property lithium iron phosphate positive material, by the raw material of following weight portion, made: LiFePO4 500, ferric trichloride 2-3, lithium acetate 3-4, gadolinium nitrate 2-3, nickel chloride 1-2, thiocarbamide 4-5, strontium chloride 4-5, 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, antimonous oxide 2-3, shitosan 2-3, crosslinking agent TAC2-3, mica powder 3-4, niobium (Nb) boride 1-2, Nb 2o 51-2, potash 2-3; 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.
Lithium battery of the present invention doping vario-property lithium iron phosphate positive material, 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 12-15Mpa pressure, be pressed into base, put into calciner and calcine 4-5 hour at 700-720 ℃, 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; Doping vario-property LiFePO 4 material of the present invention, has higher energy density and cyclical stability, makes lithium ion battery have high specific capacity and useful life, cheap, and nontoxicity, does not cause environmental pollution.
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.
Use a doping vario-property lithium iron phosphate positive material, by following weight portion (kilogram) raw material make: LiFePO4 500, ferric trichloride 2, lithium acetate 3, gadolinium nitrate 2, nickel chloride 1, thiocarbamide 4, strontium chloride 4, 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, antimonous oxide 3, shitosan 2, crosslinking agent TAC2, mica powder 4, niobium (Nb) boride 1, Nb 2o 51, potash 3; 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.
Lithium battery of the present invention doping vario-property lithium iron phosphate positive material, 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 12-15Mpa pressure, be pressed into base, put into calciner and calcine 4-5 hour at 700-720 ℃, take out, cooling, be ground into 300-400 order powder.
Lithium iron phosphate positive material of the present invention, its first discharge capacity reach 165 mAh/g; The relative lithium electrode current potential of its charge and discharge platform is about 3.5V, and initial discharge capacity surpasses 179mAh/g, capacity 2.7% left and right of approximately decaying after 100 charge and discharge cycles.

Claims (2)

1. a lithium battery doping vario-property lithium iron phosphate positive material, it is characterized in that, by the raw material of following weight portion, made: LiFePO4 500, ferric trichloride 2-3, lithium acetate 3-4, gadolinium nitrate 2-3, nickel chloride 1-2, thiocarbamide 4-5, strontium chloride 4-5, 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, antimonous oxide 2-3, shitosan 2-3, crosslinking agent TAC2-3, mica powder 3-4, niobium (Nb) boride 1-2, Nb 2o 51-2, potash 2-3; 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. lithium battery doping vario-property 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 12-15Mpa pressure, be pressed into base, put into calciner and calcine 4-5 hour at 700-720 ℃, take out, cooling, be ground into 300-400 order powder.
CN201310523489.6A 2013-10-30 2013-10-30 Lithium ion battery doped modified lithium iron phosphate positive electrode material and preparation method thereof Pending CN103531795A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310523489.6A CN103531795A (en) 2013-10-30 2013-10-30 Lithium ion battery doped modified lithium iron phosphate positive electrode material and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310523489.6A CN103531795A (en) 2013-10-30 2013-10-30 Lithium ion battery doped modified lithium iron phosphate positive electrode material and preparation method thereof

Publications (1)

Publication Number Publication Date
CN103531795A true CN103531795A (en) 2014-01-22

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Country Status (1)

Country Link
CN (1) CN103531795A (en)

Citations (3)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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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