CN103531790A - Lithium iron phosphate and lithium cobalt oxide composite material and preparation method thereof - Google Patents

Lithium iron phosphate and lithium cobalt oxide composite material and preparation method thereof Download PDF

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Publication number
CN103531790A
CN103531790A CN201310523770.XA CN201310523770A CN103531790A CN 103531790 A CN103531790 A CN 103531790A CN 201310523770 A CN201310523770 A CN 201310523770A CN 103531790 A CN103531790 A CN 103531790A
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CN
China
Prior art keywords
composite material
powder
iron phosphate
lithium
cobalt oxide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201310523770.XA
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Chinese (zh)
Inventor
林彭桃君
蒋森
陈夕顺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HEFEI HENGNENG NEW ENERGY TECHNOLOGY Co Ltd
Original Assignee
HEFEI HENGNENG NEW ENERGY TECHNOLOGY Co Ltd
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Publication date
Application filed by HEFEI HENGNENG NEW ENERGY TECHNOLOGY Co Ltd filed Critical HEFEI HENGNENG NEW ENERGY TECHNOLOGY Co Ltd
Priority to CN201310523770.XA priority Critical patent/CN103531790A/en
Publication of CN103531790A publication Critical patent/CN103531790A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • 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)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

The invention discloses a lithium iron phosphate and lithium cobalt oxide composite material. The lithium iron phosphate and lithium cobalt oxide composite material is characterized by being made of the following raw materials including, by weight, 500 parts of lithium iron phosphate, 4-5 parts of lithium cobalt oxide, 3-4 parts of nanometer titanium carbide, 3-4 parts of aluminum sulfate, 4-5 parts of modified silver powder and an appropriate amount of water. According to the lithium iron phosphate and lithium cobalt oxide composite material, the modified silver powder is added, so that the electrical conductivity of the composite material is improved; crystal growth is effectively restrained, and therefore a lithium iron phosphate material which is evenly scattered is obtained; the lithium iron phosphate and lithium cobalt oxide composite material is high in discharge capacity, thereby ensuring the consistency of industrialization and the runtime of power batteries; besides, the lithium iron phosphate and lithium cobalt oxide composite material is nontoxic and causes no environmental pollution.

Description

A kind of LiFePO4 cobalt acid lithium composite material and preparation method thereof
Technical field
The present invention relates to chemical energy source Material Field, particularly a kind of LiFePO4 cobalt acid lithium composite material and preparation method thereof.
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 a kind of LiFePO4 cobalt acid lithium composite material and preparation method thereof.
In order to realize object of the present invention, the present invention passes through following scheme implementation:
A cobalt acid lithium composite material, is made by the raw material of following weight portion: LiFePO4 500, cobalt acid lithium 4-5, nano titanium carbide 3-4, aluminum sulfate 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, 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.
LiFePO4 cobalt acid lithium composite material of the present invention, is made by following concrete steps: 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.
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 cobalt acid lithium composite material, by following weight portion (kilogram) raw material make: LiFePO4 500, cobalt acid lithium 4, nano titanium carbide 3, aluminum sulfate 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, 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.
LiFePO4 cobalt acid lithium composite material of the present invention, is made by following concrete steps: 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 169mAh/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 LiFePO4 cobalt acid lithium composite material, is characterized in that, by the raw material of following weight portion, is made: LiFePO4 500, cobalt acid lithium 4-5, nano titanium carbide 3-4, aluminum sulfate 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, 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. LiFePO4 cobalt acid lithium composite 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.
CN201310523770.XA 2013-10-30 2013-10-30 Lithium iron phosphate and lithium cobalt oxide composite material and preparation method thereof Pending CN103531790A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310523770.XA CN103531790A (en) 2013-10-30 2013-10-30 Lithium iron phosphate and lithium cobalt oxide composite material and preparation method thereof

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Application Number Priority Date Filing Date Title
CN201310523770.XA CN103531790A (en) 2013-10-30 2013-10-30 Lithium iron phosphate and lithium cobalt oxide composite material and preparation method thereof

Publications (1)

Publication Number Publication Date
CN103531790A true CN103531790A (en) 2014-01-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108281651A (en) * 2017-12-29 2018-07-13 贵州唯特高新能源科技有限公司 A kind of preparation method of the nearly ball-type LiFePO4 of dopen Nano semi-conducting material

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108281651A (en) * 2017-12-29 2018-07-13 贵州唯特高新能源科技有限公司 A kind of preparation method of the nearly ball-type LiFePO4 of dopen Nano semi-conducting material

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