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Method for preparing cobaltous hydroxide/bismuth sulfide composite nanowire electrode material of super-capacitor

A supercapacitor electrode, cobalt hydroxide technology, used in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, nanotechnology and other directions, can solve problems such as high cost and limit industrial applications, and achieve high capacity and good cycle stability. , the effect of good cycle stability

Active Publication Date: 2013-12-18
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

RuO x Due to its high energy density, wide voltage window, and highly reversible redox reaction, it has become a research hotspot. However, RuO x High cost problem limits its industrial application

Method used

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  • Method for preparing cobaltous hydroxide/bismuth sulfide composite nanowire electrode material of super-capacitor
  • Method for preparing cobaltous hydroxide/bismuth sulfide composite nanowire electrode material of super-capacitor
  • Method for preparing cobaltous hydroxide/bismuth sulfide composite nanowire electrode material of super-capacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The preparation method of the cobalt hydroxide / bismuth sulfide composite nanowire supercapacitor electrode material in this embodiment includes the following steps: 1) using a titanium sheet as an electrode substrate, polishing the titanium sheet with ordinary sandpaper, and then polishing the titanium sheet in 4% dilute hydrochloric acid Ultrasonic cleaning for 15 minutes to remove impurities and titanium oxide on the surface of the titanium sheet, and finally wash with deionized water; then prepare a layer of bismuth sulfide seed layer on the titanium sheet: first, weigh 0.51g of bismuth nitrate and 0.21g of sulfur Dissolve urea in 50mL of ethylene glycol, stir for 1 hour, then take a few drops of the above solution and drop it on the titanium sheet, scrape it evenly with a blade, and heat it on a magnetic heating table at 140°C for 5 minutes;

[0031] 2) The titanium sheet with the seed layer obtained in step 1) was annealed in air at a heating rate of 5°C / min to 350°...

Embodiment 2

[0035] The difference between this example and Example 1 is that when the cobalt hydroxide nanosheets are modified on the bismuth sulfide nanowires by electrodeposition, the electrodeposition temperature is 25°C.

Embodiment 3

[0037] The difference between this embodiment and the embodiment 1 is that when the cobalt hydroxide nanosheets are modified on the bismuth sulfide nanowires by electrodeposition, the electrodeposition temperature is 90°C.

[0038] figure 1It is the SEM figure of the bismuth sulfide nanowire and the cobalt hydroxide / bismuth sulfide composite nanowire material obtained in the preparation process of Examples 1 to 3, wherein (a), (a') are the plane view and cross section of the bismuth sulfide nanowire respectively Figures, (b), (b') are plan view and cross-sectional view of the cobalt hydroxide / bismuth sulfide composite nanowire material obtained by electrodepositing cobalt hydroxide at 10°C in Example 1, respectively, (c), (c') They are the plane view and cross-sectional view of the cobalt hydroxide / bismuth sulfide composite nanowire material obtained by electrodepositing cobalt hydroxide at 25°C in Example 2, respectively, (d) and (d') are respectively electrodeposited at 90°C...

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Abstract

The invention discloses a method for preparing a cobaltous hydroxide / bismuth sulfide composite nanowire electrode material of a super-capacitor. The method for preparing the cobaltous hydroxide / bismuth sulfide composite nanowire super-capacitor electrode material of the super-capacitor includes the steps of (1) preparing a bismuth sulfide crystal seed layer on an electrode substrate, (2) carrying out annealing treatment on the electrode substrate with the crystal seed layer obtained in the step (1) in air, (3) growing a layer of bismuth sulfide nanowire on the annealed electrode substrate obtained in the step (2) through a hydrothermal reaction to obtain the electrode substrate with the bismuth sulfide nanowire, and (4) using the electrode substrate with the bismuth sulfide nanowire obtained in the step (3) as a work electrode and embellishing a cobaltous hydroxide nanosheet on the bismuth sulfide nanowire by means of an electrodeposition method to obtain the cobaltous hydroxide / bismuth sulfide composite nanowire super-capacitor electrode material of the super-capacitor. The cobaltous hydroxide / bismuth sulfide omposite nanowire material has a high capacity and good cycling stability when serving as the super-capacitor electrode material.

Description

technical field [0001] The invention relates to a preparation method of a high-capacity supercapacitor electrode material, in particular to a preparation method of a cobalt hydroxide / bismuth sulfide composite nanowire supercapacitor electrode material. Background technique [0002] With the consumption of non-renewable resources and the aggravation of environmental pollution, the demand for low-cost and environment-friendly high-power energy sources is becoming more and more urgent. Compared with batteries and ordinary capacitors, supercapacitors have the characteristics of being able to provide high power density and high energy density, but traditional electric double layer supercapacitors cannot provide high enough energy density. In comparison, Faraday supercapacitors In the two-dimensional or quasi-two-dimensional space of the surface or bulk phase of the electrode material, the electrode active material undergoes underpotential deposition, and a fast, highly reversible...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30B82Y30/00B82Y40/00
CPCY02E60/13
Inventor 李长明杨欢谢佳乐
Owner SOUTHWEST UNIVERSITY
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