Bismuth sulfide graded nanoflower supercapacitor electrode material and preparation method

A technology for supercapacitors and electrode materials, applied in the fields of hybrid capacitor electrodes, chemical instruments and methods, hybrid/electric double layer capacitor manufacturing, etc., can solve problems that are rarely reported, achieve good size, increase capacitance, and large specific surface area Effect

Inactive Publication Date: 2017-03-08
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently little information about the successful synthesis of nanoscale Bi 2 S 3 Hierarchical structures are still poorly reported

Method used

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  • Bismuth sulfide graded nanoflower supercapacitor electrode material and preparation method
  • Bismuth sulfide graded nanoflower supercapacitor electrode material and preparation method
  • Bismuth sulfide graded nanoflower supercapacitor electrode material and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Bi 2 S 3 Preparation of Hierarchical Nanoflowers

[0019] The specific method is: weigh the prepared Bi 2 WO 6 Add 0.1 g of graded nanoflowers to 20 mL of deionized water, stir evenly, add 0.03 g of thioacetamide, continue stirring for 30 minutes, transfer the mixture to a 30 mL hydrothermal reactor, and react at 180°C for 24 hours. After the reaction kettle was naturally lowered to room temperature, the black solid precipitate was collected, and the product was washed by centrifugation with deionized water and ethanol alternately, and dried at 60°C. Finally, the black powder obtained is Bi 2 S 3 Graded nanoflowers.

Embodiment 2

[0020] Embodiment 2: electrical performance test

[0021] The specific method is:

[0022] (1) Electrode preparation: Bi 2 S 3 The electrode material, acetylene black, and polyvinyldiene were mixed uniformly in a mass ratio of 8:1:1, evenly scraped and coated on the foamed nickel current collector, and dried at 60°C to obtain a composite electrode.

[0023] (2) Electrochemical test: the active material is used as the working electrode, nickel foam is used as the counter electrode, and Pt is used as the reference electrode for three-electrode testing. All electrochemical performance tests are carried out in 6M KOH solution on the electrochemical workstation. Perform cyclic voltammetry, constant current charge and discharge tests.

[0024] (3) The electrochemical test results are attached Figure 2-5 shown. It can be seen from the figure that the prepared Bi 2 S 3 The capacitance of hierarchical nanoflowers is a pseudocapacitance, which has good redox reaction reversibili...

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Abstract

The invention relates to a bismuth sulfide (Bi2S3) graded nanoflower supercapacitor electrode material and a preparation method. Bi2WO6 graded nanoflowers are dispersed into a thioacetamide solution; after the stirring, the materials are put into a hydrothermal reaction kettle to perform hydrothermal reaction; after the reaction is completed, the materials are naturally cooled to room temperature; precipitates are collected; water and ethyl alcohol are respectively used for alternate washing for three times; centrifugation and drying are performed. The Bi2S3 nanoflowers obtained through in situ topological synthesis by a hydrothermal method have regular appearance, uniform dimension and good dispersibility; compared with a conventional Bi2S3 nanometer material, a Bi2S3 graded structure has the advantages that a greater specific surface area is realized, so that the electric capacity can be effectively improved.

Description

technical field [0001] The present invention relates to bismuth sulfide (Bi 2 S 3 ) Hierarchical nanoflower supercapacitor electrode material and preparation method, is a kind of Bi with simple preparation process, suitable for large-scale production and product with good electrochemical performance 2 S 3 Preparation methods of hierarchical nanomaterials. Background technique [0002] With the rapid development of modern industry, the global energy consumption is increasing year by year, and the energy crisis is imminent. In order to effectively solve this problem, various new technologies have emerged. Among them, supercapacitors are a new type of energy storage and conversion devices that have been gradually developed in recent decades. Supercapacitors have many outstanding features that are different from other energy storage devices, such as: supercapacitors have high specific capacitance, energy density and power density; supercapacitors have short charge and discha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00B82Y40/00H01G11/30H01G11/24H01G11/86
CPCY02E60/13C01G29/00C01P2002/72C01P2004/03C01P2004/04C01P2004/30C01P2006/12C01P2006/40H01G11/24H01G11/30H01G11/86
Inventor 李娣陈芬施伟东陈敏姜德立
Owner JIANGSU UNIV
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