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A kind of silver/cobalt sulfide supercapacitor electrode material and preparation method thereof

A technology for supercapacitors, electrode materials, applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, nanotechnology for materials and surface science, etc.

Active Publication Date: 2018-04-24
法拉德节能技术(北京)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, no reports have been found on the preparation of Ag / CoS supercapacitor electrode materials by solvothermal and photoreduction methods. The CoS used has stable chemical and physical properties, cheap and easy-to-obtain raw materials, and is non-toxic, and Ag / CoS composite materials are prepared using it as a carrier. The reaction process is simple, the production process of the resulting product is green and environmentally friendly, and the capacitor has excellent properties

Method used

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  • A kind of silver/cobalt sulfide supercapacitor electrode material and preparation method thereof
  • A kind of silver/cobalt sulfide supercapacitor electrode material and preparation method thereof
  • A kind of silver/cobalt sulfide supercapacitor electrode material and preparation method thereof

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Experimental program
Comparison scheme
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Embodiment 1

[0025] Embodiment 1: Preparation of CoS nanosheets:

[0026] The synthesis of CoS nanosheets adopts the method of solvothermal reaction: weigh 0.8mmol of CoCl 2 ·H 2 0 and 1.6mmol of thiourea in a 100mL beaker, add 37mL of absolute ethanol, and magnetically stir for 30min to completely dissolve it, then add 3.75mL of ethylenediamine, stir for another 10min, then add the resulting solution to a 50mL liner for poly Put it into a reaction kettle of tetrafluoroethylene, put it into an oven, and conduct a solvothermal reaction at 180°C for 12 hours. After the reaction is completed and cool to room temperature, centrifuge out the precipitate and wash it with water and alcohol three times, put it in an oven, dry it, and grind it to obtain CoS nanosheets .

Embodiment 2

[0027] Embodiment 2: Preparation of 2%Ag / CoS composite nanomaterial:

[0028] The synthesis of 2% Ag / CoS composite nanomaterials adopts the light reduction method: Weigh 0.1g CoS powder into a 250mL beaker, add 100mL of distilled water, place it in an ultrasonic machine with a power of 100W for 30min, add 0.0032gAgNO 3 And stir for 30min, wait for AgNO 3 After completely dissolving, place the beaker next to the 500W tungsten lamp light source, continuously stir and turn on the tungsten lamp light source, centrifuge the precipitate after 4 hours of light, wash with water and alcohol for 3 times each, put it in an oven, dry it, and grind it to get 2 %Ag / CoS composite.

Embodiment 3

[0029] Embodiment 3: Preparation of 1%Ag / CoS composite nanomaterial:

[0030] The synthesis of 1% Ag / CoS composite nanomaterials uses the photoreduction method: Weigh 0.1g of CoS powder into a 250mL beaker, add 100mL of distilled water, place it in an ultrasonic machine with a power of 100W for 30min, and then add 0.0016g of AgNO 3 And stir for 30min, wait for AgNO 3 After completely dissolving, place the beaker next to the 500W tungsten lamp light source, continuously stir and turn on the tungsten lamp light source, centrifuge out the precipitate after 4 hours of light, wash with water and alcohol for 3 times, put it in an oven, dry it, and grind it to get 1 %Ag / CoS composite.

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Abstract

The invention belongs to the technical field of preparation of supercapacitor materials, and relates to a method for preparing silver / cobalt sulfide nanosheet supercapacitor electrode materials. Weigh the CoS nanosheets and dissolve them in distilled water, ultrasonically disperse them, then add AgNO3, stir magnetically until the AgNO3 is completely dissolved, then expose the dispersion to the irradiation of a tungsten lamp, and use the photochemical reduction method to prepare in-situ loaded silver nanoparticles on the surface of the CoS nanosheets. The particles are continuously stirred, and the obtained product is washed with distilled water and absolute ethanol, centrifuged and dried to obtain a silver / cobalt sulfide composite nanometer material. The Ag / CoS composite nanomaterial, acetylene black and polyvinylidene fluoride solution were stirred and mixed, and the mixed solution was evenly added dropwise on the nickel foam, dried and pressed into tablets, and the experimental capacitor was assembled, and the electrochemical workstation was used for cyclic voltammetry and Constant current charge and discharge test.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of supercapacitor materials, and relates to a preparation method of a silver / cobalt sulfide nanosheet supercapacitor electrode material, in particular, a preparation process is simple, and has good capacitance performance and excellent constant current charge and discharge stability method for the preparation of composite materials. technical background [0002] Today, energy saving and environmental protection are increasingly becoming the mainstay. As a new type of energy storage device, supercapacitors have the characteristics and advantages of fast charging and discharging, no pollution to the environment, and long cycle life. They can replace traditional batteries in some fields and become new energy storage devices. It is a new type of green energy in the century, and its application has attracted more and more attention from all over the world. [0003] Cobalt sulfide (CoS) is a non-t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/24B82Y30/00
CPCY02E60/13
Inventor 陈敏徐箐姜德立王天勇邵乐强
Owner 法拉德节能技术(北京)股份有限公司