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Bismuth/carbon supercapacitor battery and preparation method thereof

A supercapacitor battery and carbon electrode technology, applied in the field of electrochemical energy storage, can solve problems such as no related reports on research and application, and achieve the effects of environmental friendliness, long cycle life and large electric capacity

Active Publication Date: 2017-01-04
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there have been many reports on the application of metal bismuth as a photocatalyst and lubricant, but there are no relevant reports on the research and application of bismuth in supercapacitor batteries.

Method used

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  • Bismuth/carbon supercapacitor battery and preparation method thereof
  • Bismuth/carbon supercapacitor battery and preparation method thereof
  • Bismuth/carbon supercapacitor 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, set aside.

[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 as 3:1, take a certain mass of sodium borohydride and dissolve it in 20ml deionized water to form a sodium borohydride solution. At room temperature, stir the sodium borohydride solution Add 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 put it in a vacuum drying oven at 90°C. After drying for 12 hours, the bismuth material was obtained.

[0052] (4) adopt J...

Embodiment 2

[0058] (1) Weigh 1.99g of bismuth citrate and dissolve it in 20ml of ethylene glycol solution.

[0059] (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.

[0060] (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, at 90°C, NaH 2 PO 2 solution was added dropwise to the step (2) solution, after the dropwise addition was completed, the stirring was continued for 300 min until the solution changed from clarification to black, and the resultant was washed with distilled water and ethanol and suction filtered several times until the pH value was neutral. Put it into a vacuum drying oven and dry it at 80°C for 18 hours to obtain a bismuth material.

[0061] (4) adopt JEOLJEM-3010 type scanning electron microscope to test the bismuth powder material prepared by embodiment 2, ...

Embodiment 3

[0063] (1) Weigh a certain mass Bi 2 (SO 4 ) 3 , dissolved in 10mL of concentrated sulfuric acid solution, and prepared as 0.5mol / L Bi 2 (SO4) 3 solution, set aside.

[0064] (2) Add 0.05 g of sodium oleate into the solution in step (1), mix well, and stir at room temperature for 30 min.

[0065](3) According to the 80:1 molar ratio of hydrazine hydrate and bismuth ions, measure 80wt% hydrazine hydrate and dilute it into a solution of a certain concentration. At 90°C, add the hydrazine hydrate solution dropwise to step (2) while stirring. In the solution, after the dropwise addition, continue to stir for 120min until the solution turns from clear to black, wash and filter the resultant with distilled water and ethanol for several times until the pH value is neutral, and put it in a vacuum drying oven at 70°C Dry for 24 hours to obtain bismuth material.

[0066] (4) Preparation of bismuth electrode and carbon electrode: according to the mass percent of bismuth or carbon m...

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Abstract

The invention discloses a bismuth / carbon supercapacitor battery and a preparation method thereof. The bismuth / carbon supercapacitor battery uses a bismuth electrode for providing Faraday capacitance, uses a carbon electrode for providing electric double-layer capacitance, and uses an alkaline solution as an electrolyte; the bismuth is metal bismuth powder with the particle size of 0.005-5 microns and has the specific surface area of 5-500m<2> / g; a preparation method of the metal bismuth powder comprises the following steps: mixing an auxiliary agent and bismuth ions with a certain concentration in a proper molar ratio to obtain a mixed solution, then dropwise adding a reducing agent into the mixed solution, and reacting to prepare metal bismuth powder material. When the bismuth / carbon supercapacitor battery is prepared, the bismuth electrode is used as a capacitance limiting electrode, and the capacitance of the carbon electrode is 0-30% higher than that of the bismuth electrode. The bismuth / carbon supercapacitor battery has the working voltage of 0-1V, and has the specific capacitance of 258mAh / g when the current density is 0.5A / g. The bismuth / carbon supercapacitor battery has good electrochemical performance, 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 / carbon supercapacitor battery and a preparation method thereof, belonging to the technical field of electrochemical energy storage. Background technique [0002] With the progress of society, people's demand for energy is increasing rapidly. At present, the most common energy storage devices include batteries and supercapacitors, but in many fields, these two can no longer meet the application requirements well. In order to obtain higher energy density and power density at the same time, people began to design a new type of supercapacitor battery. One pole of the supercapacitor battery is an electric double layer capacitor electrode, and the other pole is a Faraday capacitor electrode. The supercapacitor battery combines the advantages of electric double layer capacitors and batteries. It has greater energy density than traditional electrochemical capacitors, higher power density than secondary batteries, and can be ...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/32H01G11/84
CPCY02E60/13H01G11/30H01G11/32H01G11/84
Inventor 刘恩辉蒋海霞王洛杨锃
Owner XIANGTAN UNIV
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