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Ce-Co-S composite material as well as preparation method and application thereof

A composite material, ce-co-s technology, used in Ce-Co-S composite material and its preparation, the application field of super capacitor, can solve the problems of poor electrochemical stability, poor conductivity, hindering practical application, etc. Environmentally friendly, high energy density and power density, the effect of shortening synthesis time

Active Publication Date: 2020-06-12
SHANGHAI INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor electrical conductivity and poor electrochemical stability of these materials seriously hinder their practical applications.

Method used

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  • Ce-Co-S composite material as well as preparation method and application thereof
  • Ce-Co-S composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of Ce-Co-S composite material, comprising the following steps:

[0029] 1mmol Co(NO 3 ) 2 ·6H 2 O, 1mmol Ce(NO 3 ) 3 ·6H 2 O, 6 mmol NH 4 F, 5mmol of urea was dissolved in 40mL of water, after magnetically stirring evenly, 0.3g of thioacetamide was added to it and quickly transferred to an 80mL polytetrafluoroethylene-lined stainless steel autoclave for one-step hydrothermal reaction. The hydrothermal reaction temperature was 180°C, the hydrothermal reaction time is 16h; the sample after hydroheating is taken out and cooled, then centrifuged, washed, and vacuum-dried at 60°C for 12h to obtain Ce-Co-S powder. After the active material is ground, it is evenly mixed with carbon black and polytetrafluoroethylene in a mass ratio of 8:1:1, pressed onto a nickel foam sheet (1cm×1cm), and dried in an oven at 60°C for 12h to obtain Ce-Co-S working electrode (note CCS-1).

[0030] Jingchenhua CHI760e electrochemical workstation adopts cyclic voltammet...

Embodiment 2

[0034] A preparation method of Ce-Co-S composite material, comprising the following steps:

[0035] 1mmol Co(NO 3 ) 2 ·6H 2 O, 0.5mmol Ce(NO 3 ) 3 ·6H 2 O, 6 mmol NH 4 F, 5mmol of urea was dissolved in 40mL of water, after magnetically stirring evenly, 0.3g of thioacetamide was added to it and quickly transferred to an 80mL polytetrafluoroethylene-lined stainless steel autoclave for one-step hydrothermal reaction. The hydrothermal reaction temperature was 180°C, the hydrothermal reaction time is 16h; the sample after hydroheating is taken out and cooled, then centrifuged, washed, and vacuum-dried at 60°C for 12h to obtain Ce-Co-S powder. After the active material is ground, it is evenly mixed with carbon black and polytetrafluoroethylene in a mass ratio of 8:1:1, pressed onto a nickel foam sheet (1cm×1cm), and dried in an oven at 60°C for 12h to obtain Ce-Co-S working electrode (note CCS-2).

[0036] Jingchenhua CHI760e electrochemical workstation adopts cyclic voltammet...

Embodiment 3

[0038] A preparation method of Ce-Co-S composite material, comprising the following steps:

[0039] 1mmol Co(NO 3 ) 2 ·6H 2 O, 2mmol Ce(NO 3 ) 3 ·6H 2 O, 6 mmol NH 4 F, 5mmol of urea was dissolved in 40mL of water, after magnetically stirring evenly, 0.3 thioacetamide was added to it and quickly transferred to an 80mL polytetrafluoroethylene-lined stainless steel autoclave for one-step hydrothermal reaction, the hydrothermal reaction temperature was 180 °C, the hydrothermal reaction time is 16h; the hydrothermal sample is taken out to cool, then centrifuged, washed, and vacuum-dried at 60°C for 12h to obtain Ce-Co-S powder. After the active material is ground, it is evenly mixed with carbon black and polytetrafluoroethylene in a mass ratio of 8:1:1, pressed onto a nickel foam sheet (1cm×1cm), and dried in an oven at 60°C for 12h to obtain Ce-Co-S working electrode (note CCS-3).

[0040] Jingchenhua CHI760e electrochemical workstation adopts the method of cyclic voltamm...

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Abstract

The invention relates to a Ce-Co-S composite material and a preparation method and application thereof. The preparation method of the composite material comprises the steps that soluble cobalt salt, soluble cerium salt, urea and ammonium fluoride are dissolved in water, and then thioacetamide is added for a hydrothermal reaction; and after the thermal reaction is finished, cooling, centrifuging, washing and drying to obtain the Ce-Co-S composite material. The composite material is prepared into a working electrode which is used in a supercapacitor. Compared with the prior art, the Ce-Co-S composite material is synthesized through one-step hydrothermal synthesis, the preparation method is environmentally friendly, simple and convenient, large-scale production is facilitated, and the Ce-Co-Scomposite material has the advantages of being high in specific surface area, very high in specific capacitance, good in cycle performance and high energy density, excellent in electrochemical performance and the like.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry and nanometer materials, and in particular relates to a Ce-Co-S composite material, a preparation method thereof and an application in a supercapacitor. Background technique [0002] With the increasing demand for wearable electronic devices, highly flexible and lightweight energy storage devices have attracted extensive attention in recent years. Supercapacitors, especially flexible supercapacitors, are widely regarded as one of the most promising power sources for wearable electronic devices due to their good electrochemical performance, high flexibility and environmental friendliness. Supercapacitors have attracted extensive attention due to their excellent properties such as fast charge and discharge time, high power density, and good cycle life. Moreover, flexible supercapacitors have also been widely used with the increasing demand for portable and wearable electronic devices such ...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30
CPCH01G11/86H01G11/30Y02E60/13
Inventor 韩生胡晓敏刘顺昌马健王露露孙瑶馨蒋继波陈宇凯
Owner SHANGHAI INSTITUTE OF TECHNOLOGY
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