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Bismuth ferrite/nickel hydroxide secondary alkali battery and preparation method therefor

A nickel hydroxide, alkaline battery technology, applied in the field of electrochemical energy storage, can solve the problem of less research on electrochemical performance, and achieve the effects of superior rate performance, large electric capacity, and broad application prospects.

Inactive Publication Date: 2017-05-10
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] So far, people have made some achievements in the research on the magnetic and photocatalytic properties of bismuth ferrite materials, but there are relatively few studies on its electrochemical properties.

Method used

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  • Bismuth ferrite/nickel hydroxide secondary alkali battery and preparation method therefor
  • Bismuth ferrite/nickel hydroxide secondary alkali battery and preparation method therefor
  • Bismuth ferrite/nickel hydroxide secondary alkali battery and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Weigh 5mmol of bismuth acetate and 5mmol of iron acetate, dissolve them in 100ml of distilled water, raise the temperature to 90°C, and add 20ml of 5mol / L tartaric acid solution dropwise while stirring. After the dropwise addition, keep the temperature and continue stirring for 3h. After drying and grinding, the precursor powder is obtained; the precursor powder is placed in a tube furnace, and the O 2 with N 2 In the mixed atmosphere (O 2 Gas and N 2 The volume percentages of gas are respectively 25% and 75%), the temperature is raised to 500° C. for heat treatment for 5 h, and then the furnace is cooled to room temperature, and the resulting heat treatment product is washed with distilled water and ethanol several times respectively, and solid-liquid separation is carried out. Vacuum drying at a temperature of 80°C to a constant weight yields bismuth ferrite material.

[0044] (2) Adopt the JEOLJEM-3010 type scanning electron microscope to test the bismuth ferr...

Embodiment 2

[0053] (1) Weigh 2mmol of bismuth oxide and 2mmol of iron oxide, disperse them in 50ml of ethanol, raise the temperature to 70°C, and add 20ml of 4mol / L tartrate ethanol solution dropwise while stirring. After the dropwise addition, keep the temperature and stir for 5h. After drying and grinding, the precursor powder was obtained; the precursor powder was placed in a muffle furnace, heated to 600°C in the air environment for heat treatment for 6 hours, and then cooled to room temperature with the furnace, and the heat-treated product was washed with distilled water and ethanol for several times, and suction filtration, and vacuum-dry the solid product at 120° C. to constant weight to obtain a bismuth ferrite material.

[0054] (2) the preparation of nickel hydroxide electrode and bismuth ferrite electrode is with the step (4) in embodiment 1

[0055] (3) Put the prepared nickel hydroxide electrode sheet / diaphragm / bismuth ferrite electrode sheet into a special battery mold in t...

Embodiment 3

[0058] (1) Weigh 5mmol of bismuth nitrate and 4.5mmol of ferric nitrate, dissolve them in 100ml of distilled water, raise the temperature to 100°C, add 50ml of 4mol / L citric acid solution dropwise while stirring, after the dropwise addition, keep the temperature and continue to stir for reaction After 2 hours, the precursor powder was obtained by drying and grinding, and the precursor powder was placed in a tube furnace, and the flow rate was 100ml / min. 2 with CO 2 In the mixed atmosphere (O 2 Gas and CO 2 The volume percentages of gas are respectively 35% and 65%), heated up to 600°C for heat treatment for 6h, and then cooled to room temperature with the furnace, the heat-treated product was washed with distilled water and ethanol several times, and suction filtered, and the solid product was heated at 90°C Dry under vacuum until constant weight to obtain bismuth ferrite material.

[0059] (2) Preparation of bismuth ferrite electrode and nickel hydroxide electrode

[0060...

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Abstract

The invention discloses a bismuth ferrite / nickel hydroxide secondary alkali battery and a preparation method therefor. Bismuth ferrite (BiFeO<3>) is used as a negative electrode material of the battery; nickel hydroxide is used as a positive electrode material of the battery; an alkali solution is used as an electrolyte solution; and the battery is 0.2-1.5V in voltage window. The preparation method for the bismuth ferrite comprises the following steps of enabling a mixed solution of bismuth and iron ions and a precipitator solution to be reacted based on certain stoichiometric ratio to obtain a precursor; and putting the precursor into a high-temperature furnace under certain atmosphere environment, performing heat treatment to obtain a product, and then performing washing, solid / liquid separation, drying and grinding on the product to prepare the bismuth ferrite material. The specific capacity of the configured battery is 243mAh / g at current density of 1A / g; and the capacity retention rate is 78.6% after 500 circles. The battery is high in electrochemical performance and environment-friendly, and is a novel reversible secondary chemical power supply with wide application prospect.

Description

technical field [0001] The present invention relates to a bismuth ferrite (BiFeO 3 ) / nickel hydroxide secondary alkaline battery and a preparation method thereof, belonging to the technical field of electrochemical energy storage. Background technique [0002] In recent years, due to the severe air pollution caused by automobile exhaust emissions in cities, it has been highly valued by all walks of life. The promotion and popularization of hybrid electric vehicles and pure electric vehicles is considered to be the best solution to this problem. Nickel battery refers to a type of chemical power source that uses nickel hydroxide as the positive electrode material. However, various negative electrode materials of nickel batteries still have problems of one kind or another at present. For example, the negative electrode of nickel / hydrogen battery adopts rare earth hydrogen storage alloy, which leads to higher battery cost and higher requirements for battery assembly process; ni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/30H01M4/52H01M4/58H01M10/28
CPCH01M4/52H01M4/5825H01M10/28H01M10/30Y02E60/10Y02P70/50
Inventor 刘恩辉杨锃王洛蒋海霞
Owner XIANGTAN UNIV
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