Cu<2+>/Co<2+>/Ce<4+>/Ag<+>-doped ferric fluoride composite positive pole material and preparation method thereof

A composite positive electrode material and iron salt technology, which is applied in the direction of iron halide, battery electrodes, electrical components, etc., can solve the problems of not too good energy density, unsuitable for industrial applications, and low discharge voltage, so as to improve the discharge potential and comprehensive Electrochemical performance, effect of improving energy density

Active Publication Date: 2014-12-03
郎溪品旭科技发展有限公司
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  • Summary
  • 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 effecti

Method used

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  • Cu&lt;2+&gt;/Co&lt;2+&gt;/Ce&lt;4+&gt;/Ag&lt;+&gt;-doped ferric fluoride composite positive pole material and preparation method thereof

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 3.2% by weight of Cu(C 2 o 4 )·0.5H 2 O, 3% Co(Ac) by weight 2 4H 2 O, the weight percent is 14% Ce (NH 4 ) 2 (NO 3 ) 6 , 4% by weight of AgNO 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. After heating up to 450 degrees and keeping the temperature for 2 hours, cooling to prepare Cu 2+ ,Co 2+ , Ce 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, the weight percentage is 3.5% Ce(NH 4 ) 2 (NO 3 ) 6 , 8% by weight of 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 After cooling to 400 degrees for 6 hours, the prepared Cu 2+ ,Co 2+ , Ce 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, 6% by weight of Ce(NH 4 ) 2 (NO 3 ) 6 , 14% by weight of 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 8 hours, then cool down to prepare Cu 2+ ,Co 2+ , Ce 4+ , Ag + doped modified FeF 3 Cathode material.

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Abstract

The invention relates to a Cu<2+>/Co<2+>/Ce<4+>/Ag<+>-doped modified ferric fluoride composite positive pole material and a preparation method thereof. The method comprises the following steps: carrying out ball milling on copper salt, cobalt salt, cerium salt, silver salt and synthesis raw material in a high-energy ball mill for some time, and carrying out heat treatment to obtain the FeF3 positive pole material. The Cu<2+> partially occupies the iron ion coordination in FeF3, thereby being beneficial to enhancing the discharge potential and the energy density; the doped Co<2+> is beneficial to enhancing the lithium ion conductivity of the material; the doped high-valence Ce<4+> is beneficial to enhancing the specific capacity of the material; the Ag<+> is doped to lower the conversion reaction activation energy at the time of charging; and thus, the method is beneficial to enhancing the magnification characteristic and energy density, thereby enhancing the comprehensive electrochemical properties of the material.

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): C01G49/10H01M4/58H01M4/62
CPCY02E60/10
Inventor 徐玲霞水淼徐晓萍陈姝郑卫东高珊舒杰冯琳任元龙
Owner 郎溪品旭科技发展有限公司
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