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

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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 hydr

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

Experimental program
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Example Embodiment

[0046] Example 1

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

[0048] (2) Use JEOLJEM-3010 scanning electron microscope to test the material prepared in step (1) of Example 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) Use an XRD-6000 X-ray diffractometer to test the material prepared in step (1) of E...

Example Embodiment

[0054] Example 2

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

[0056] (2) Use JEOLJEM-3010 scanning electron microscope to characterize the spherical nickel hydroxide materials used, such as figure 2 As shown, the nickel hydroxide material is microspheres 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 percentage of elements contained in the nickel hydroxide material is 48 to 63% nickel, 0.5 to 12% cobalt, 0.5 to...

Example Embodiment

[0062] Example 3

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

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

[0065] (4) The CHI660A electrochemical workstation produced by Shanghai Chenhua Company was used to perform cyclic voltammetry on the constructed battery at room temperature. The voltage window was 0.4-1.3V and the scan rate was 5mV / s. Such as Figure 7 Shown are the volt-amper...

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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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