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Preparation method of flower-like nickel sulfide material and application of flower-like nickel sulfide material in super capacitor

A nickel sulfide, flower-shaped technology, applied in the application of supercapacitors, flower-shaped nickel sulfide materials, the field of preparation of flower-shaped nickel sulfide materials, can solve the problem of decreased electrical conductivity and specific capacitance, poor stability of supercapacitors, The problem of large changes in electrode volume expansion has achieved the effect of improving cycle stability, improving cycle stability, and increasing specific capacitance

Active Publication Date: 2016-04-13
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the nickel sulfide material in actual production is prone to irregular agglomeration at the interface, which leads to excessive volume expansion of the electrode during charging and discharging, and the phenomenon of material pulverization or even falling, which makes the supercapacitor The stability performance becomes worse during the charge and discharge process, and the conductivity and specific capacitance decrease after multiple cycles of charge and discharge

Method used

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  • Preparation method of flower-like nickel sulfide material and application of flower-like nickel sulfide material in super capacitor
  • Preparation method of flower-like nickel sulfide material and application of flower-like nickel sulfide material in super capacitor
  • Preparation method of flower-like nickel sulfide material and application of flower-like nickel sulfide material in super capacitor

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Experimental program
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Effect test

Embodiment 1

[0028] (1) Dissolve the nickel source precursor nickel acetate in a certain amount of deionized water, then add a certain amount of ethanol, and ultrasonically disperse for 30 minutes at a temperature of 15-40°C, a power of 100-200W, and a frequency of 15-20kHz. -40min, then add thiourea, the precursor of the sulfur source, and a certain amount of F127, and ultrasonically disperse for 30-40min at a temperature of 15-40°C, a power of 100-200W, and a frequency of 15-20kHz to obtain a reaction solution;

[0029] Wherein the mass ratio of the nickel acetate that adds in the above-mentioned mixed solution and thiourea is 1:0.92, the mass ratio of the F127 that adds and nickel acetate is 5:274, the volume ratio of the ethanol that adds in the mixed solution and deionized water is 1: 5;

[0030] (2), transfer the reaction liquid obtained in step (1) into a hydrothermal kettle for solvothermal reaction, control the temperature at 180°C for 24 hours, wash the obtained reaction liquid w...

Embodiment 2

[0037] (1) Dissolve the nickel source precursor nickel acetate in a certain amount of deionized water, then add a certain amount of ethanol, and ultrasonically disperse for 30 minutes at a temperature of 15-40°C, a power of 100-200W, and a frequency of 15-20kHz. -40min, then add thiourea, the precursor of the sulfur source, and a certain amount of F127, and ultrasonically disperse for 30-40min at a temperature of 15-40°C, a power of 100-200W, and a frequency of 15-20kHz to obtain a reaction solution;

[0038] Wherein the mass ratio of the nickel acetate that adds in the above-mentioned mixed solution and thiourea is 1:1.53, the mass ratio of the F127 that adds and nickel acetate is 10:274, the ethanol that adds in the mixed solution and the volume ratio of deionized water are 1: 5;

[0039] (2), move the reaction liquid obtained in step (1) into a hydrothermal kettle for solvothermal reaction, and carry out the reaction at a temperature of 180°C for 24 hours, and wash the obta...

Embodiment 3

[0043] (1) Dissolve the nickel source precursor nickel acetate in a certain amount of deionized water, then add a certain amount of ethanol, and ultrasonically disperse for 30 minutes at a temperature of 15-40°C, a power of 100-200W, and a frequency of 15-20kHz. -40min, then add thiourea, the precursor of the sulfur source, and a certain amount of F127, and ultrasonically disperse for 30-40min at a temperature of 15-40°C, a power of 100-200W, and a frequency of 15-20kHz to obtain a reaction solution;

[0044] Wherein the mass ratio of the nickel acetate that adds in the above-mentioned mixed solution and thiourea is 1:0.92, the mass ratio of the F127 that adds and nickel acetate is 10:274, the volume ratio of the ethanol that adds in the mixed solution and deionized water is 1: 3;

[0045] (2), move the reaction liquid obtained in step (1) into a hydrothermal kettle for solvothermal reaction, control the temperature at 180°C for 24 hours, wash the obtained reaction liquid with...

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Abstract

The invention provides a preparation method of a flower-like nickel sulfide material. The method comprises the following steps: dissolving a nickel source precursor nickel acetate into deionized water, adding ethanol for ultrasonic dispersion and then adding a precursor thiourea of a sulfur source and a surfactant for ultrasonic dispersion again to obtain a reaction liquid; transferring the obtained reaction liquid into a hydrothermal reactor for solvothermal reaction and controlling the temperature for reaction; and respectively washing the obtained reaction liquid with the deionized water and the ethanol, and then carrying out drying to obtain the flower-like nickel sulfide material. An electrochemical test proves that the obtained flower-like nickel sulfide material has excellent charge and discharge properties and cycling stability. An experiment proves that the specific capacitance of the material is 1350F / g at 1A / G charge and discharge currents; the preparation method has the advantages that reaction conditions are easy to control; the preparation technology is simple; the obtained product is good in uniformity; and industrial production of nickel sulfide is facilitated.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and relates to a flower-shaped nickel sulfide material, in particular to a preparation method of a flower-shaped nickel sulfide material and its application in supercapacitors. Background technique [0002] Metal sulfides have excellent photoelectromagnetic properties and catalytic properties, and have become a research hotspot in the field of inorganic materials. Nickel sulfide, in particular, has the advantages of being non-toxic and cheap, has a unique electronic structure and excellent optical, electrical and magnetic properties, because of such advantages, it has been considered as a very promising electrode material and can be used In supercapacitors, lithium-ion batteries, dye-sensitized solar cells, etc. [0003] There are many methods for preparing nickel sulfide, such as high-temperature gas phase, high-temperature solid-phase synthesis, and electrochemical synthesis, but these metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/24C01G53/11
CPCY02E60/13H01G11/30C01G53/11H01G11/24
Inventor 韩生余伟萍崔煜刘凡储磊邱丰喻宁波刘金宝江新泽付宁冯晨萁蔺华林薛原马鹏余焓于飞卢德力蒋继波李原婷裴素鹏祝俊何忠义熊丽萍
Owner SHANGHAI INST OF TECH
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