CN103531768A - Doped modified lithium titanate negative electrode material and preparation method thereof - Google Patents

Doped modified lithium titanate negative electrode material and preparation method thereof Download PDF

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Publication number
CN103531768A
CN103531768A CN201310523571.9A CN201310523571A CN103531768A CN 103531768 A CN103531768 A CN 103531768A CN 201310523571 A CN201310523571 A CN 201310523571A CN 103531768 A CN103531768 A CN 103531768A
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China
Prior art keywords
powder
lithium titanate
parts
silver powder
hour
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Pending
Application number
CN201310523571.9A
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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 CN201310523571.9A priority Critical patent/CN103531768A/en
Publication of CN103531768A publication Critical patent/CN103531768A/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
    • H01M4/48—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
    • 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
    • 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)
  • Composite Materials (AREA)
  • Inorganic Chemistry (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

The invention discloses a doped modified lithium titanate negative electrode material which is characterized in that the material is prepared from the raw materials of, by weight: 400 parts of lithium titanate, 2-3 parts of gallium powder, 1-2 parts of caesium powder, 3-4 parts of lithium cobaltate, 2-3 parts of cerium oxide, 1-2 parts of ammonium persulfate, 4-5 parts of modification silver powder, and proper amount of water. According to the invention, the modification silver powder is added, such that the material is provided with good battery dynamic performance, good circulation performance, and good high-rate charge/discharge capacity. Therefore, the performance of a lithium ion battery with the material as the negative electrode is improved. The material has large discharge capacity, such that power battery industry consistency and endurance are ensured. The process is simple and feasible, and the cost is low. The material is nontoxic, and does not cause environment pollution. The material and the method are suitable for industrialized productions.

Description

A kind of doping vario-property lithium titanate composite negative pole material and preparation method thereof
Technical field
The present invention relates to chemical energy source Material Field, particularly a kind of doping vario-property lithium titanate composite negative pole 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 doping vario-property lithium titanate composite negative pole material and preparation method thereof.
In order to realize object of the present invention, the present invention passes through following scheme implementation:
A lithium titanate composite negative pole material, is made by the raw material of following weight portion: lithium titanate 400, gallium powder 2-3, caesium powder 1-2, cobalt acid lithium 3-4, cerium oxide 2-3, ammonium persulfate 1-2, 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.
Doping vario-property lithium titanate composite negative pole 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; Discharge capacity of the present invention is large, has guaranteed consistency and the flying power of electrokinetic cell industrialization, simple for process, cheap, and nontoxicity, does not cause environmental pollution, is applicable to suitability for industrialized production.
Embodiment
Below by instantiation, the present invention is described in detail.
A lithium titanate composite negative pole material, by following weight portion (kilogram) raw material make: lithium titanate 400, gallium powder 2, caesium powder 1, cobalt acid lithium 3, cerium oxide 2, ammonium persulfate 1, 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.
Doping vario-property lithium titanate composite negative pole 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 negative 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 doping vario-property lithium titanate composite negative pole material, is characterized in that, by the raw material of following weight portion, is made: lithium titanate 400, gallium powder 2-3, caesium powder 1-2, cobalt acid lithium 3-4, cerium oxide 2-3, ammonium persulfate 1-2, 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. doping vario-property lithium titanate composite negative pole 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.
CN201310523571.9A 2013-10-30 2013-10-30 Doped modified lithium titanate negative electrode material and preparation method thereof Pending CN103531768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310523571.9A CN103531768A (en) 2013-10-30 2013-10-30 Doped modified lithium titanate negative electrode material and preparation method thereof

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Application Number Priority Date Filing Date Title
CN201310523571.9A CN103531768A (en) 2013-10-30 2013-10-30 Doped modified lithium titanate negative electrode material and preparation method thereof

Publications (1)

Publication Number Publication Date
CN103531768A true CN103531768A (en) 2014-01-22

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104733710A (en) * 2015-03-03 2015-06-24 深圳市翔丰华科技有限公司 Lithium titanate negative electrode material and preparation method thereof
CN104795553A (en) * 2015-03-20 2015-07-22 深圳市翔丰华科技有限公司 Lithium ion battery cathode material of anatase TiO2 mixed carbon nanotube
CN104835953A (en) * 2015-03-20 2015-08-12 深圳市翔丰华科技有限公司 Lithium ion battery anode material of anatase-TiO2 mixed with graphene

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101488584A (en) * 2009-03-06 2009-07-22 清华大学 Asymmetric lithium iron phosphate cell using lithium titanate as main active substance of negative pole

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101488584A (en) * 2009-03-06 2009-07-22 清华大学 Asymmetric lithium iron phosphate cell using lithium titanate as main active substance of negative pole

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104733710A (en) * 2015-03-03 2015-06-24 深圳市翔丰华科技有限公司 Lithium titanate negative electrode material and preparation method thereof
CN104795553A (en) * 2015-03-20 2015-07-22 深圳市翔丰华科技有限公司 Lithium ion battery cathode material of anatase TiO2 mixed carbon nanotube
CN104835953A (en) * 2015-03-20 2015-08-12 深圳市翔丰华科技有限公司 Lithium ion battery anode material of anatase-TiO2 mixed with graphene
CN104795553B (en) * 2015-03-20 2018-03-27 深圳市翔丰华科技股份有限公司 Anatase TiO2Mix the lithium ion battery negative material of CNT

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Application publication date: 20140122