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Preparation method for bismuth molybdate/polyaniline composite supercapacitor electrode material

A technology for supercapacitors and electrode materials, which is used in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors. It can solve the problems of poor cycle stability, low working voltage and energy storage density, and poor mechanical properties. Improve the effect of simple method

Inactive Publication Date: 2017-07-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its poor mechanical properties often lead to poor cycle stability, low working voltage and low energy storage density.

Method used

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  • Preparation method for bismuth molybdate/polyaniline composite supercapacitor electrode material
  • Preparation method for bismuth molybdate/polyaniline composite supercapacitor electrode material
  • Preparation method for bismuth molybdate/polyaniline composite supercapacitor electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] At room temperature, dissolve 2 mmol of bismuth nitrate and 1 mmol of sodium molybdate in 5 mL of ethylene glycol, add urea solution (3 mmol of urea dissolved in 15 mL of absolute ethanol) after ultrasonication for 0.5 h, continue stirring for 15 min, and dissolve the mixed solution Pour it into a 50mL polytetrafluoroethylene-lined stainless steel hydrothermal reaction kettle, seal it, and heat it at 140°C for 8 hours. After cooling naturally, wash it three times with deionized water and absolute ethanol alternately. Vacuum drying for 12 hours to obtain bismuth molybdate.

[0023] Ultrasonic disperse 0.10g of bismuth molybdate and 0.30g of sodium lignosulfonate in 50mL of deionized water to obtain a mixed solution, add 0.20mL of aniline monomer and 0.39g of p-toluenesulfonic acid, then change to ice bath stirring, and slowly Ammonium persulfate solution (0.43 g of ammonium persulfate dissolved in 20 mL of deionized water) was added dropwise, and after reacting in an ice...

Embodiment 2

[0025] At room temperature, dissolve 2 mmol of bismuth nitrate and 1 mmol of sodium molybdate in 10 mL of ethylene glycol, add urea solution (4 mmol of urea dissolved in 20 mL of absolute ethanol) after ultrasonication for 0.5 h, continue stirring for 15 min, and dissolve the mixed solution Pour it into a 50mL polytetrafluoroethylene-lined stainless steel hydrothermal reaction kettle, seal it, and heat it at 160°C for 10 hours. After cooling naturally, wash it alternately with deionized water and absolute ethanol for 3 times. Vacuum drying for 12 hours to obtain bismuth molybdate.

[0026] Ultrasonic disperse 0.10g of bismuth molybdate and 0.40g of sodium lignosulfonate in 50mL of deionized water to obtain a mixed solution, add 0.30mL of aniline monomer and 0.39g of p-toluenesulfonic acid, then change to ice bath stirring, wait for the aniline to disperse slowly Ammonium persulfate solution (0.43 g of ammonium persulfate dissolved in 20 mL of deionized water) was added dropwis...

Embodiment 3

[0028] At room temperature, dissolve 2 mmol of bismuth nitrate and 1 mmol of sodium molybdate in 10 mL of ethylene glycol, add urea solution (5 mmol of urea dissolved in 25 mL of absolute ethanol) after ultrasonication for 0.5 h, continue stirring for 15 min, and dissolve the mixed solution Pour it into a 50mL polytetrafluoroethylene-lined stainless steel hydrothermal reaction kettle, seal it and heat it at 160°C for 12 hours. After cooling naturally, wash it three times with deionized water and absolute ethanol alternately. Vacuum drying for 12 hours to obtain bismuth molybdate.

[0029] Ultrasonic disperse 0.10g of bismuth molybdate and 0.50g of sodium lignosulfonate in 50mL of deionized water to obtain a mixed solution, add 0.40mL of aniline monomer and 0.39g of p-toluenesulfonic acid, then change to ice bath stirring, wait for the aniline to disperse slowly Add ammonium persulfate solution (0.43 g of ammonium persulfate dissolved in 20 mL of deionized water) dropwise, reac...

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Abstract

The invention provides a preparation method for a bismuth molybdate / polyaniline composite supercapacitor electrode material. The preparation method comprises the following steps of dissolving bismuth nitrate and sodium molybdate into ethylene glycol at a molar ratio at a room temperature to obtain a mixed solution A, and performing ultrasonic uniformity and adding a mixed solution of urea and absolute ethyl alcohol; stirring continuously and uniformly and then pouring the mixed solution into a polytetrafluoroethylene stainless steel hydrothermal reaction kettle, sealing and performing a solvothermal reaction; after naturally cooling, performing washing and drying to obtain bismuth molybdate; performing ultrasonic dispersion of bismuth molybdate and lignin sodium sulfonate into deionized water to obtain a mixed solution, then adding an aniline monomer and p-toluenesulfonic acid, and then changing into ice- bath stirring, after the aniline is dispersed, obtaining a mixed solution B; and slowly dropwise adding an ammonium persulfate solution to the mixed solution B, and after the ice-bath reaction is completed, performing washing and drying to obtain the bismuth molybdate / polyaniline composite material. The method is simple, and the capacitance performance of the prepared bismuth molybdate / polyaniline composite material is greatly improved.

Description

technical field [0001] The invention belongs to the field of preparation of supercapacitor electrode materials, in particular to bismuth molybdate (Bi molybdate) in which sodium lignosulfonate is a dopant 2 MoO 6 ) / polyaniline (PANI) composite supercapacitor electrode material preparation method. Background technique [0002] In recent decades, a new type of energy storage device with performance between traditional capacitors and batteries has been developed at home and abroad, that is, supercapacitors, which have higher energy density than traditional capacitors, as well as higher power density of batteries and more Long cycle life, no pollution to the environment, wide operating temperature range, high safety performance, etc., the application prospect is very broad. Supercapacitors mainly use the electric double layer at the electrode / electrolyte interface or the redox reaction on the electrode surface to store charges, and the key to determining its performance is the...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/46H01G11/48H01G11/86
CPCY02E60/13H01G11/24H01G11/30H01G11/46H01G11/48H01G11/86
Inventor 吴方胜郑宛茹白雪王晓红郝臣高海文周赛赛
Owner JIANGSU UNIV
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