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Cu<2+>, Co<2+>, Zr<4+> and Ag+ doped ferric fluoride composite anode material and preparation method

A composite positive electrode material and iron salt technology, applied in battery electrodes, electrochemical generators, electrical components, etc., can solve the problems of not too good energy density, unsuitable for industrial applications, poor economy, etc., to improve the discharge potential , improve the comprehensive electrochemical performance, improve the effect of lithium ion conductivity

Active Publication Date: 2014-11-19
求法问律(菏泽)法律咨询服务有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the attachment of carbon materials on the surface of positive electrode material particles mainly depends on physical adsorption, and it is difficult to form a complete carbon conductive link.
Here, as mentioned earlier, the discharge voltage of this material is relatively low, and the effective energy density is not too good; finally, because FeF 3 The material is slightly soluble in cold water, so it is usually prepared by the ethanol liquid phase method, which requires a large amount of ethanol during the synthesis process, which is not economical
Not suitable for industrial applications

Method used

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  • Cu&lt;2+&gt;, Co&lt;2+&gt;, Zr&lt;4+&gt; and Ag+ doped ferric fluoride composite anode material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: Fe(NO 3 ) 3 9H 2 O and ammonium fluoride (molar ratio 1.0:3.1) and 5% by weight of Cu(C 2 o 4 )·0.5H 2 O, 4% Co(Ac) by weight 2 4H 2 O, 10% by weight of Zr(NO 3 ) 4 ·5H 2 O, 5% AgNO by weight 3 , 0.6% by weight of Tween-80 and 0.5% by weight of ethanol are ball milled at room temperature for 5 hours under the protection of high-purity nitrogen in a high-energy ball mill. Heat up to 400 degrees and keep the temperature for 2 hours, then cool down to prepare Cu 2+ ,Co 2+ , Zr 4+ , Ag + doped modified FeF 3 Cathode material.

Embodiment 2

[0023] Embodiment 2: FeCl 3 ·6H 2 O and ammonium fluoride (molar ratio 1.0:3.6) and 6% by weight of Cu(C 2 o 4 )·0.5H 2 O, the weight percentage is 15% Co (C 2 o 4 )·4H 2 O, 4% by weight of Zr(NO 3 ) 4 ·5H 2 O, 8% by weight AgNO 3 , Span-60 with a weight percentage of 0.9% and ethanol with a weight percentage of 1.0% were ball milled at room temperature for 20 hours under the protection of high-purity nitrogen in a high-energy ball mill, and then the materials were taken out, and the temperature was raised under the protection of a mixed gas of 5% hydrogen and 95% argon Cool to 450°C for 10 hours to prepare Cu 2+ ,Co 2+ , Zr 4+ , Ag + doped modified FeF 3 Cathode material.

Embodiment 3

[0024] Embodiment 3: Fe 2 (SO 4 ) 3 9H 2 O and ammonium fluoride (molar ratio 1.0:3.5) and 15% by weight of Cu(NO 3 ) 2 ·3H 2 O, the weight percentage is 8% Co (C 2 o 4 )·4H 2 O, 7% by weight of ZrO (NO 3 ) 2 2H 2 O, 14% by weight AgNO 3 1.5% by weight of Tween-80 and 2.0% by weight of ethanol were ball milled at room temperature for 10 hours under the protection of high-purity argon in a high-energy ball mill, and then the materials were taken out and protected by a mixed gas of 5% hydrogen and 95% argon. Heat up to 350 degrees and keep the temperature for 5 hours, then cool down to prepare Cu 2+ ,Co 2+ , Zr 4+ , Ag + doped modified FeF 3 Cathode material.

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Abstract

The invention relates to a Cu<2+>, Co<2+>, Zr<4+> and Ag<+> doped modified ferric fluoride anode material and a preparation method. The method is characterized in that copper salt, cobalt salt, zircon salt, silver salt and synthetic raw materials are ball milled for a period of time in a high-energy ball mill and thermally treated to obtain the FeF3 anode material. Cu<2+> partially occupies coordination of iron ions of FeF3, so that the discharge potential can be increased, and the energy density can be improved; by virtue of Co<2+> doping, the electrical conductivity of lithium ions of the material can be increased; by virtue of high-valent Zr<4+> doping, the size of a lithium ion passage can be fine tuned while the specific capacity of the material is improved; by virtue of Ag<+> doping, the conversion reaction activation energy in charging can be reduced; accordingly, the multiplying power characteristics and energy density of the anode material can be improved, so that the comprehensive electrochemical performance of the anode material can be improved.

Description

technical field [0001] The invention relates to the technical field of a method for manufacturing a high-capacity iron fluoride composite lithium battery cathode material. Background technique [0002] Lithium-ion secondary batteries have the absolute advantages of high volume, weight-to-energy ratio, high voltage, low self-discharge rate, no memory effect, long cycle life, and high power density. Currently, the global mobile power market has an annual share of more than 30 billion US dollars and Gradually grow at a rate of more than 10%. Especially in recent years, with the gradual depletion of fossil energy, new energy sources such as solar energy, wind energy, and biomass energy have gradually become alternatives to traditional energy sources. Among them, wind energy and solar energy are intermittent, and a large amount of energy is used simultaneously to meet the needs of continuous power supply. Energy storage batteries; urban air quality problems caused by automobile ...

Claims

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Application Information

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IPC IPC(8): H01M4/136H01M4/1397
CPCH01M4/362H01M4/582H01M10/0525Y02E60/10
Inventor 徐玲霞水淼徐晓萍陈姝郑卫东高珊舒杰冯琳任元龙
Owner 求法问律(菏泽)法律咨询服务有限公司
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