CN103545511A - Lithium-iron phosphate battery positive material and preparation method thereof - Google Patents

Lithium-iron phosphate battery positive material and preparation method thereof Download PDF

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Publication number
CN103545511A
CN103545511A CN201310523505.1A CN201310523505A CN103545511A CN 103545511 A CN103545511 A CN 103545511A CN 201310523505 A CN201310523505 A CN 201310523505A CN 103545511 A CN103545511 A CN 103545511A
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CN
China
Prior art keywords
lithium
powder
parts
silver powder
iron phosphate
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
CN201310523505.1A
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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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Filing date
Publication date
Application filed by HEFEI HENGNENG NEW ENERGY TECHNOLOGY Co Ltd filed Critical HEFEI HENGNENG NEW ENERGY TECHNOLOGY Co Ltd
Priority to CN201310523505.1A priority Critical patent/CN103545511A/en
Publication of CN103545511A publication Critical patent/CN103545511A/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
    • H01M4/58—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
    • 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

Abstract

The invention discloses a lithium-iron phosphate battery positive material which is characterized by comprising the following raw materials in parts by weight: 500 parts of lithium-iron phosphate, 4-5 parts of conductive carbon black, 2-3 parts of tin, 4-5 parts of polyaniline, 5-6 parts of lithium manganate, 4-5 parts of modified silver powder and a proper amount of water. According to the lithium-ion phosphate battery positive material, a stable electronic conductive channel is formed, the dispersion distance of lithium ions can be shortened, the discharge capacity is large, the consistency and cruising power of the power battery industry can be ensured, and the lithium-ion phosphate battery anode material is low in price, non-toxic, and free from environment pollution.

Description

A kind of lithium iron phosphate battery positive material and preparation method thereof
Technical field
The present invention relates to chemical energy source Material Field, particularly a kind of lithium iron phosphate battery positive 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 LiMn of spinel structure 2o 4liCoO with 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 a kind of lithium iron phosphate battery positive material and preparation method thereof.
In order to realize object of the present invention, the present invention passes through following scheme implementation:
, by the raw material of following weight portion, made: LiFePO4 500, conductive carbon black 4-5, tin 2-3, polyaniline 4-5, LiMn2O4 5-6, 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, calgon 1-2, silane resin acceptor kh-550 1-2, titanium diboride 2-3, V 2o 53-4, SnO 21-2, B 2o 35-7, ZrO 21-2; Each raw material is mixed, be heated to 50-55 ℃, grind 1-2 hour, be uniformly dispersed into powder, send in calciner at 450-480 ℃ sintering 2-3 hour and get final product.
Lithium iron phosphate battery positive 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 12-15Mpa pressure, be pressed into base, put into calciner and calcine 4-5 hour at 650-700 ℃, take out, cooling, be ground into 300-400 order powder.
The invention has the beneficial effects as follows: the present invention has formed stable electron conduction passage, shortened the diffusion length of lithium ion, discharge capacity is large, has guaranteed consistency and the flying power of electrokinetic cell industrialization, 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.
, by following weight portion (kilogram) raw material make: LiFePO4 500, conductive carbon black 4, tin 2, polyaniline 4, LiMn2O4 5, 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, calgon 2, silane resin acceptor kh-550 1, titanium diboride 2, V 2o 53, SnO 21, B 2o 37, ZrO 21; Each raw material is mixed, be heated to 50-55 ℃, grind 1-2 hour, be uniformly dispersed into powder, send in calciner at 450-480 ℃ sintering 2-3 hour and get final product.
Lithium iron phosphate battery positive 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 12-15Mpa pressure, be pressed into base, put into calciner and calcine 4-5 hour at 650-700 ℃, 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 iron phosphate battery positive material, is characterized in that, by the raw material of following weight portion, is made: LiFePO4 500, conductive carbon black 4-5, tin 2-3, polyaniline 4-5, LiMn2O4 5-6, 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, calgon 1-2, silane resin acceptor kh-550 1-2, titanium diboride 2-3, V 2o 53-4, SnO 21-2, B 2o 35-7, ZrO 21-2; Each raw material is mixed, be heated to 50-55 ℃, grind 1-2 hour, be uniformly dispersed into powder, send in calciner at 450-480 ℃ sintering 2-3 hour and get final product.
2. lithium iron phosphate battery 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 650-700 ℃, take out, cooling, be ground into 300-400 order powder.
CN201310523505.1A 2013-10-30 2013-10-30 Lithium-iron phosphate battery positive material and preparation method thereof Pending CN103545511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310523505.1A CN103545511A (en) 2013-10-30 2013-10-30 Lithium-iron phosphate battery positive material and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310523505.1A CN103545511A (en) 2013-10-30 2013-10-30 Lithium-iron phosphate battery positive material and preparation method thereof

Publications (1)

Publication Number Publication Date
CN103545511A true CN103545511A (en) 2014-01-29

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CN (1) CN103545511A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108807925A (en) * 2018-06-21 2018-11-13 梁汝腾 A kind of lithium iron phosphate battery positive material and preparation method thereof

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
CN101901898A (en) * 2009-12-07 2010-12-01 耿世达 Lithium battery LiFePO4 anode material with internal three-dimensional conductive structure and preparation method thereof
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
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
CN101901898A (en) * 2009-12-07 2010-12-01 耿世达 Lithium battery LiFePO4 anode material with internal three-dimensional conductive structure and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108807925A (en) * 2018-06-21 2018-11-13 梁汝腾 A kind of lithium iron phosphate battery positive material and preparation method thereof

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Application publication date: 20140129