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A kind of hollow core-shell structure supercapacitor material fe-co-s/nf and its preparation method and application

A supercapacitor, core-shell structure technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of difficult application, low capacitance and energy density, and achieve good electrochemical energy storage properties, The effect of reducing contact resistance and mild reaction conditions

Active Publication Date: 2020-09-18
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, commercial supercapacitors are mainly made of carbon materials with high specific surface area. This material mainly stores charges based on the principle of electric double layer and has a very high cycle life. However, the capacitance and energy density are relatively low, which is difficult to meet the actual requirements. application

Method used

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  • A kind of hollow core-shell structure supercapacitor material fe-co-s/nf and its preparation method and application
  • A kind of hollow core-shell structure supercapacitor material fe-co-s/nf and its preparation method and application
  • A kind of hollow core-shell structure supercapacitor material fe-co-s/nf and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for preparing a hollow core-shell structure supercapacitor material Fe-Co-S / NF, comprising the following steps:

[0043] (1) Preparation of Co-MOF / NF:

[0044] Dissolve 2mmol cobalt nitrate hexahydrate in 40ml deionized water to obtain solution A, which is set aside;

[0045] Dissolve 16mmol dimethylimidazole in 40ml deionized water to obtain solution B, set aside;

[0046] Slowly add the A solution to the B solution, stir for 5 minutes to obtain the C solution, and set aside;

[0047] Soak nickel foam in the C solution and react for 4 hours to obtain Co-MOF / NF, which is ready for use.

[0048] (2) Preparation of LDH@Co-MOF / NF:

[0049] Preparation of soluble ferrous sulfate (FeSO 4 ) aqueous solution, standby;

[0050] Soak Co-MOF / NF in the ferrous sulfate aqueous solution for 5 minutes, take out the sample, and dry to obtain LDH@Co-MOF / NF, which is ready for use.

[0051] (3) Preparation of Fe-Co-S / NF electrode material:

[0052] First, 120 mg of thioa...

Embodiment 2

[0062] A method for preparing a hollow core-shell structure supercapacitor material Fe-Co-S / NF, comprising the following steps:

[0063] (1) Preparation of Co-MOF / NF:

[0064] 2mmol cobalt chloride hexahydrate was dissolved in 40ml deionized water to obtain solution A, which was set aside;

[0065] Dissolve 16mmol of isophthalic acid in 40ml of deionized water to obtain solution B, which is set aside;

[0066] Slowly add the A solution to the B solution, stir for 5 minutes to obtain the C solution, and set aside;

[0067] Soak nickel foam in the C solution and react for 5 hours to obtain Co-MOF / NF, which is ready for use.

[0068] (2) Preparation of LDH@Co-MOF / NF:

[0069] Preparation of soluble ferrous sulfate (FeSO 4 ) aqueous solution, standby;

[0070] Soak the Co-MOF / NF in the ferrous sulfate aqueous solution for 2 minutes, take out the sample, and dry it to obtain LDH@Co-MOF / NF, which is ready for use.

[0071] (3) Preparation of Fe-Co-S / NF electrode material:

[...

Embodiment 3

[0077] A method for preparing a hollow core-shell structure supercapacitor material Fe-Co-S / NF, comprising the following steps:

[0078] (1) Preparation of Co-MOF / NF:

[0079] Dissolve 2 mmol of cobalt acetate tetrahydrate in 40 ml of deionized water to obtain solution A, which is set aside;

[0080] Dissolve 16mmol of 2,6-naphthalenedioic acid in 40ml of deionized water to obtain solution B, which is set aside;

[0081] Slowly add the A solution to the B solution, stir for 5 minutes to obtain the C solution, and set aside;

[0082] Soak nickel foam in the C solution and react for 2 hours to obtain Co-MOF / NF, which is ready for use.

[0083] (2) Preparation of LDH@Co-MOF / NF:

[0084] Preparation of soluble ferrous sulfate (FeSO 4 ) aqueous solution, standby;

[0085] Soak the Co-MOF / NF in the ferrous sulfate aqueous solution for 10 minutes, take out the sample, and dry to obtain LDH@Co-MOF / NF, which is ready for use.

[0086] (3) Preparation of Fe-Co-S / NF electrode mater...

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Abstract

The invention relates to the technical field of supercapacitor materials, and in particular relates to a hollow core-shell structure supercapacitor material Fe-Co-S / NF as well as a preparation methodand an application thereof. The method comprises the following steps of 1) preparing a cobalt source, an organic ligand and a solvent into a reaction solution, and soaking nickel foam in the reactionsolution to react to obtain Co-MOF / NF; 2) enabling the Co-MOF / NF to be soaked in a ferrous sulfate water solution, after completing, then taking out Co-MOF / NF and performing drying to obtain LDH@Co-MOF / NF; and (3) enabling a sulfur source, the solvent and the LDH@Co-MOF / NF to be reacted in a sealing condition, and drying the reaction product after the reaction is ended, so as to obtain the product. According to the preparation method disclosed by the invention, the cobalt-based MOF grows on the foamed nickel to serve as a template for in-situ synthesis of a Fe-Co-S electrode material with ultra-high-performance; and when the electrode material is used for constructing a high-performance supercapacitor self-supporting electrode material, super-high mass specific capacitance is shown.

Description

technical field [0001] The invention relates to the technical field of supercapacitor materials, in particular to a supercapacitor material (Fe-Co-S / NF) with a hollow core-shell structure and its preparation method and application. Background technique [0002] In the Background of the Invention, the disclosed information is only intended to increase the understanding of the general background of the present invention, and is not necessarily to be regarded as an acknowledgment or in any form to imply that the information constitutes the prior art already known to those skilled in the art. [0003] Supercapacitors are a power source between traditional capacitors and batteries, and have the advantages of high power density, short discharge time, long cycle life, and wide operating temperature range. Therefore, it can be widely used in different application scenarios such as auxiliary peak power, backup power supply, stored regenerative energy, and alternative power supply. M...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86
CPCH01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 刘久荣刘伟乐凯汪宙吴莉莉王凤龙
Owner SHANDONG UNIV