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Preparation method of copper vanadate for lithium-ion battery cathode material

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as difficulty in large-scale industrial production, uncontrollable product morphology, long-term high-temperature treatment, etc., to achieve rich surface pores, Excellent electrochemical performance and short reaction time

Inactive Publication Date: 2016-11-09
SHAANXI UNIV OF SCI & TECH
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  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for creation of new types of metal compounds called CuV2O4. These metals have unique properties that make them useful in batteries or other applications such as energy storage devices (ES). They are also suitable for use at temperatures above room temperature due their ability to form strong covalent bonds between atoms without losing any electrical conductivity when they react chemically. Additionally, these special structures allow for better control over crystal structure and chemical composition, resulting in improved battery characteristics like fast charging/discharging rates and long cycle life.

Problems solved by technology

This patented technical problem addressed by this patents relates to improving the durability and lifespan of Lithium ion recharge batteries while maintaining good electrical properties at room temperatures or low temperatures.

Method used

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  • Preparation method of copper vanadate for lithium-ion battery cathode material
  • Preparation method of copper vanadate for lithium-ion battery cathode material
  • Preparation method of copper vanadate for lithium-ion battery cathode material

Examples

Experimental program
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Embodiment 1

[0026] 1) Weigh 0.7154g analytically pure cuprous oxide (Cu 2 O) dispersed in 100mL ethanol aqueous solution (V 乙醇 :V 水 =1:3), magnetically stirred for 0.5h to obtain suspension A. Weigh 0.91g analytically pure vanadium pentoxide (V 2 o 5 ) powder into 60mL hydrogen peroxide (H 2 o 2 ) aqueous solution, stirred for 0.1 h to obtain solution B; wherein, the volume fraction of hydrogen peroxide aqueous solution was 5%.

[0027] 2) After the solution B is stirred, immediately drop it into the suspension A drop by drop, and then continue to stir, the color of the solution A gradually changes from dark red to olive green. After stirring, filter, wash and dry under vacuum at 60°C for 12h.

[0028] 3) Spread the dried powder evenly in a porcelain boat, and under the protection of nitrogen, raise the temperature from room temperature to 300°C at a rate of 5°C / min and keep it warm for 0.5h; then cool with the furnace, and the obtained powder is lithium Ion battery anode copper v...

Embodiment 2

[0034] 1) Disperse analytically pure cuprous oxide in aqueous ethanol, and magnetically stir for 2 hours to disperse cuprous oxide in aqueous ethanol to obtain suspension A; wherein, the ratio of cuprous oxide to aqueous ethanol is 0.5:100mL; aqueous ethanol is Prepared by uniformly mixing deionized water and ethanol at a volume ratio of 2:1; adding analytically pure vanadium pentoxide powder into a 5% hydrogen peroxide aqueous solution, and stirring for 1.5 hours to obtain solution B; Wherein, the ratio of vanadium pentoxide powder to hydrogen peroxide aqueous solution is 1g:60mL.

[0035] 2) Immediately drop solution B into suspension A drop by drop, and then continue to stir until the color of the solution changes from dark red to olive green, stop stirring, after stirring, filter, wash and dry in vacuum at 60°C for 12 hours to obtain powder Body; Wherein, the mol ratio of the cuprous oxide in the suspension A and the vanadium pentoxide in the solution B is 0.5:1;

[0036]...

Embodiment 3

[0038] 1) Disperse analytically pure cuprous oxide in aqueous ethanol, and magnetically stir for 4 hours to disperse cuprous oxide in aqueous ethanol to obtain suspension A; wherein, the ratio of cuprous oxide to aqueous ethanol is 1g:100mL; aqueous ethanol is Prepared by uniformly mixing deionized water and ethanol at a volume ratio of 3:1; adding analytically pure vanadium pentoxide powder into a 5% hydrogen peroxide aqueous solution and stirring for 0.8h to obtain solution B; Wherein, the ratio of vanadium pentoxide powder to hydrogen peroxide aqueous solution is 0.5g:60mL.

[0039] 2) Immediately drop solution B into suspension A drop by drop, then continue to stir until the color of the solution changes from dark red to olive green, stop stirring, after stirring, filter and wash and dry in vacuum at 60°C for 12 hours to obtain powder Body; Wherein, the mol ratio of the cuprous oxide in the suspension A and the vanadium pentoxide in the solution B is 1:1;

[0040] 3) Unde...

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Abstract

A preparation method of copper vanadate for lithium-ion battery cathode material includes: dispersing cuprous oxide in ethanol solution, and stirring to obtain suspension A; adding vanadium pentoxide powder into hydrogen peroxide solution, and stirring to obtain solution B; dropwise adding the solution B into the suspension A, continuing to stir until the color of obtained solution turns from dark red to olive green, filtering, washing and drying to obtain powder; holding the powder at 200-400 DEG C for 0.1-2 h to obtain the copper vanadate for lithium-ion battery cathode material. Copper vanadate is material is generated directly based on cuprous oxide through in-situ topological reactions by using insoluble cuprous oxide as a template. The method is simple, has no need for complex equipment, enables preparation of a required material under normal temperature and normal pressure, and since the cuprous copper is used as a hard template, it is possible to control the shape of a product. In addition, the reaction time is short, product purity is high, the whole process flow is simple, and it is easy to implement industrialization.

Description

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Claims

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Application Information

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Owner SHAANXI UNIV OF SCI & TECH
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