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Secondary bismuth oxychloride/nickel hydroxide alkaline battery and preparation method thereof

A technology of bismuth oxychloride and nickel hydroxide is applied in the field of electrochemical energy storage, which can solve the problems that have not been seen before, and achieve the effects of large electric capacity, excellent electrical performance and long cycle life.

Inactive Publication Date: 2017-02-22
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] So far, there have been no related documents and patents on the construction of bismuth oxychloride / nickel hydroxide secondary alkaline batteries with nickel hydroxide as the positive electrode active material, bismuth oxychloride as the negative electrode active material, and alkaline solution as the electrolyte solution. report

Method used

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  • Secondary bismuth oxychloride/nickel hydroxide alkaline battery and preparation method thereof
  • Secondary bismuth oxychloride/nickel hydroxide alkaline battery and preparation method thereof
  • Secondary bismuth oxychloride/nickel hydroxide alkaline battery and preparation method thereof

Examples

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Effect test

Embodiment 1

[0047] (1) Weigh 10mmol bismuth chloride, dissolve it in 20ml of hydrochloric acid solution with a concentration of 2mol / L, slowly add 29.75ml of 2mol / L sodium acetate solution dropwise while stirring at room temperature, after the dropwise addition, fully stir again After 30 minutes, the final pH of the system was 3, and the white precipitate was washed several times with distilled water and ethanol, respectively, and filtered with suction. Dry the solid product at a temperature of 120°C to a constant weight to obtain bismuth oxychloride material.

[0048] (2) Adopt JEOLJEM-3010 type scanning electron microscope to test the prepared material of embodiment 1 step (1), as figure 1 As shown, the bismuth oxychloride material has a microsphere structure, and the microspheres are stacked by nanosheets, the diameter of the microspheres is about 6 μm, and the thickness of the nanosheets is about 60 nm.

[0049] (3) adopt XRD-6000 type X-ray diffractometer to test the prepared materi...

Embodiment 2

[0055] (1) Weigh 4mmol bismuth chloride, dissolve it in 20ml of nitric acid solution with a concentration of 4mol / L, raise the temperature to 50°C, add 160ml of 2mol / L triethanolamine solution dropwise while stirring, and stir fully after the addition is completed After 120 minutes, the final pH of the system was 3, and the obtained white product was washed several times with distilled water and ethanol, respectively, and suction-filtered. The solid product was vacuum-dried at 80° C. to constant weight to obtain a bismuth oxychloride material.

[0056] (2) Adopt JEOLJEM-3010 scanning electron microscope to characterize the spherical nickel hydroxide material adopted, such as figure 2 As shown, the nickel hydroxide material is a microsphere with a diameter of about 5-15 μm.

[0057] Elemental analysis shows that the nickel hydroxide material used has a β crystal structure, and the mass percentages of the elements contained in the nickel hydroxide material are 48-63% nickel, 0...

Embodiment 3

[0063] (1) Weigh 10 mmol of bismuth nitrate, disperse it in 20 ml of distilled water, and ultrasonically hydrolyze it for 30 min to form a suspension. While stirring at room temperature, add 20 ml of sodium chloride solution with a concentration of 5 mol / L dropwise, and react for 150 minutes after the dropwise addition is completed. The final pH of the system is 4. The resulting white precipitate is washed with distilled water and ethanol several times, and pumped. filter. The solid product was vacuum-dried at a temperature of 100° C. to a constant weight to obtain a bismuth oxychloride material.

[0064] Steps (2), (3) are respectively the same as steps (4), (5) in Example 1.

[0065](4) The CHI660A electrochemical workstation produced by Shanghai Chenhua Company was used to conduct cyclic voltammetry tests on the constructed batteries at room temperature, with a voltage window of 0.4-1.3V and a scan rate of 5mV / s. Such as Figure 7 Shown are the voltammetric curves of the...

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Abstract

The invention discloses a secondary bismuth oxychloride / nickel hydroxide alkaline battery and a preparation method thereof. Bismuth oxychloride serves as negative electrode materials, nickel hydroxide serves as positive electrode materials, and alkaline solution serves as electrolyte solution. A preparation method of the bismuth oxychloride includes the steps: dripping deposition agents into bismuth chloride solution, and performing reaction; or hydrolyzing bismuth nitrate or bismuth sulfate to form supernatant solution, and dripping chloride ion solution into the supernatant solution according to a certain mole ratio of bismuth and chlorine; or mixing bismuth materials and solution to form supernatant solution, and dripping hydrochloric acid solution into the supernatant solution according to a certain mole ratio of the bismuth and the chlorine; controlling terminal PH (potential of hydrogen) to be 1-5, and preparing the bismuth oxychloride materials formed by nano sheets. The thickness of each bismuth oxychloride material ranges from 5nm to 100nm. Specific capacity of the battery prepared by the method is 298mAh / g under 1A / g of current density. The battery is a novel reversible secondary chemical power supply with wide application prospects, large in electric capacity, excellent in electrochemical performance and environmentally friendly.

Description

technical field [0001] The invention relates to a bismuth oxychloride / nickel hydroxide secondary alkaline battery and a preparation method thereof, belonging to the technical field of electrochemical energy storage. Background technique [0002] With the development of society and economy, the demand for energy is increasing day by day, and the current consumption mode dominated by traditional fossil fuels has brought huge environmental pollution. Therefore, finding new green alternative energy has become an urgent task to be solved globally. The series of nickel batteries with nickel hydroxide as the positive electrode are continuously developing and innovating. Nickel hydroxide is used as the positive electrode and combined with different negative electrode materials to form different types of nickel batteries, including nickel / hydrogen batteries, nickel / cadmium batteries, nickel / iron batteries and nickel / zinc batteries. Nickel / hydrogen batteries have the advantages of hi...

Claims

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Application Information

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IPC IPC(8): H01M10/30H01M10/28H01M4/52H01M4/58
CPCH01M4/52H01M4/5825H01M10/28H01M10/30Y02E60/10Y02P70/50
Inventor 刘恩辉杨锃刘琨王洛蒋海霞
Owner XIANGTAN UNIV
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