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Bismuth/nickel hydroxide secondary alkaline battery and preparation method thereof

A technology of nickel hydroxide and alkaline batteries, which is applied in the field of electrochemical energy storage, can solve problems that have not been reported, and achieve the effects of environmental friendliness, broad application prospects, and large capacity

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

AI Technical Summary

Problems solved by technology

However, there is no report on the literature and patent research on the secondary alkaline battery with metal bismuth as the negative pole and nickel hydroxide as the positive pole.

Method used

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  • Bismuth/nickel hydroxide secondary alkaline battery and preparation method thereof
  • Bismuth/nickel hydroxide secondary alkaline battery and preparation method thereof
  • Bismuth/nickel hydroxide secondary alkaline battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Weigh a certain mass of Bi(NO 3 ) 3 ·5H 2 O, dissolved in 10ml of concentrated nitric acid solution, diluted with water, prepared into 0.5mol / L Bi(NO 3 ) 3 solution.

[0050] (2) 2.22g PVP, 20mL 0.5mol / L Bi(NO 3 ) 3 The solution was successively added into a 100mL round bottom flask, after mixing evenly, it was stirred at room temperature for 30min.

[0051] (3) According to the molar ratio of sodium borohydride and bismuth ions is 3:1, take a certain amount of sodium borohydride and dissolve it in 20ml deionized water to form a sodium borohydride solution, stir the sodium borohydride solution one by one at room temperature Add it dropwise to the solution in step (2). After the dropwise addition, continue to stir for 5 minutes. Wash and filter the resultant with distilled water and ethanol for several times until the pH value is neutral, and dry it in a vacuum oven at 60°C. 30h, the bismuth material was prepared.

[0052] (4) adopt JEOLJEM-3010 type scanning...

Embodiment 2

[0061] (1) Weigh 1.99g of bismuth citrate and dissolve it in 20ml of ethylene glycol solution.

[0062] (2) Add 0.5 g of tartaric acid and 2.0 g of sodium hydroxide to the solution in step (1) sequentially, mix well, and stir at room temperature for 30 min.

[0063] (3) by NaH 2 PO 2 and bismuth ion molar ratio is 80:1, weigh a certain mass of NaH 2 PO 2 Dissolve in 40ml deionized water to make NaH 2 PO 2 solution, NaH was stirred at 90°C 2 PO 2 Add the solution dropwise to the step (2) solution. After the dropwise addition, continue to stir for 300 min until the solution turns from clear to black. Wash and filter the resultant with distilled water and ethanol for several times until the pH is neutral. Dry in a vacuum drying oven at 80°C for 24 hours to obtain a bismuth material.

[0064] (4) Adopt the JEOLJEM-3010 type scanning electron microscope to test the bismuth material prepared by embodiment 2, such as figure 2 As shown, the bismuth powder material is compose...

Embodiment 3

[0066] (1) Weigh 4.8507g Bi(NO 3 ) 3 ·5H 2 O, dissolved in 20ml ethylene glycol solution.

[0067] (2) Add 2.22g of PVP into the solution of step (1), mix well, and stir at room temperature for 30min.

[0068] (3) According to the molar ratio of sodium borohydride and bismuth ions is 3:1, take a certain amount of sodium borohydride and dissolve it in 20ml deionized water to form a sodium borohydride solution, stir the sodium borohydride solution one by one at room temperature Add it dropwise to the solution in step (2). After the dropwise addition is completed, continue to stir for 5 minutes. Wash and filter the resultant with distilled water and ethanol for several times until the pH is neutral, and dry it in a vacuum oven at 60°C for 30 hours. , to produce bismuth materials.

[0069] (4) With step (6) in embodiment 1.

[0070] (5) Put the prepared nickel hydroxide electrode sheet / diaphragm / bismuth electrode sheet into a special battery mold in turn to form a sandwich st...

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Abstract

The invention discloses a bismuth / nickel hydroxide secondary alkaline battery and a preparation method thereof. The battery provided by the invention takes metal bismuth as a negative electrode active material of the battery, nickel hydroxide as a positive electrode active material of the battery and an alkaline solution as an electrolyte solution, and a voltage window of the battery is 0.2V to 1.4V. Preparation of a bismuth material comprises: dropwise adding a reducing agent solution into a bismuth ion solution containing an auxiliary agent according to a certain mol ratio of a reducing agent to bismuth ions, and reacting for a certain time; after the reaction is finished, washing a product and carrying out solid-liquid separation; drying solids in vacuum to prepare the bismuth material. The bismuth material is metal powder with the grain diameter of 0.005mu m to 5mu m, and the specific surface area of the bismuth material is 5m<2> / g to 500m<2> / g. The specific capacity of the battery under the current density of 5A / g is 254mAh / g. The battery provided by the invention has large electric capacity and good cycling stability, is environment-friendly and is a novel chemical power supply with a wide application prospect.

Description

technical field [0001] The invention relates to a bismuth / 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 industry and the growth of population, people's demand for energy is also increasing. Due to the over-exploitation of fossil energy in recent decades, the energy is gradually exhausted, so we urgently need to develop new renewable energy. Although we have developed a variety of renewable energy sources such as wind energy and solar water energy in contemporary times, their use is limited due to the instability of these natural energy sources, but we can solve these problems through energy storage, transfer, backup, etc. Among them, chemical batteries have become the best choice for energy storage due to their high conversion efficiency, high energy density, less environmental pollution, easy portability, and energy conve...

Claims

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Application Information

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IPC IPC(8): H01M4/38H01M4/52H01M10/30H01M10/28
CPCH01M4/38H01M4/52H01M10/28H01M10/30Y02E60/10Y02P70/50
Inventor 刘恩辉蒋海霞杨锃王洛
Owner XIANGTAN UNIV
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