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Preparation method of supercapacitor electrode material NiCoMn-LDH/functionalized graphene

A technology for supercapacitors and electrode materials, applied in the field of electrochemical materials, can solve problems such as poor conductivity and limitations, achieve good power density, low cost, and improve the effect of interface charge transport

Active Publication Date: 2021-11-02
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its poor electrical conductivity and easy agglomeration and stacking, which affect its specific surface area and active sites, its application as an electrode material has been greatly limited.

Method used

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  • Preparation method of supercapacitor electrode material NiCoMn-LDH/functionalized graphene
  • Preparation method of supercapacitor electrode material NiCoMn-LDH/functionalized graphene
  • Preparation method of supercapacitor electrode material NiCoMn-LDH/functionalized graphene

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preparation example Construction

[0031] A preparation method of supercapacitor electrode material NiCoMn-LDH / functionalized graphene, comprising the following steps:

[0032] (1) Preparation of functionalized graphene

[0033] Graphene oxide was prepared by the improved Hummers method. After the tube furnace was heated to 800°C, about 0.1 g of ground graphene oxide was put into a crucible each time, and the crucible was placed in the tube furnace, and it was taken out after about 120 seconds to obtain thermally reduced graphene oxide (rGO).

[0034] Take p-aminobenzoic acid and put it into a beaker containing a certain amount of concentrated hydrochloric acid and deionized water, cool it to 0°C, and then add NaNO dropwise. 2 Solution, when the temperature drops to 0°C, stir for 10 minutes, take rGO and add it to the beaker, stop the reaction after stirring for 10-14 hours, centrifuge and wash with absolute ethanol, hydrochloric acid and deionized water respectively, after the washing is completed, at 60 °C ...

Embodiment 1

[0044] A preparation method of supercapacitor electrode material NiCoMn-LDH / functionalized graphene, comprising the following steps:

[0045] (1) Preparation of functionalized graphene

[0046] Graphene oxide was prepared by the modified Hummers method. After the tube furnace was heated to 800°C, about 0.1 g of ground graphene oxide was put into a crucible each time, and the crucible was placed in the tube furnace, and it was taken out after about 120 seconds to obtain thermally reduced graphene oxide (rGO).

[0047] Take 1.7g of p-aminobenzoic acid and put it into a 100mL beaker containing 5mL of concentrated hydrochloric acid and 10mL of deionized water and cool it to 0°C, then add 3 mL of 0.3g / ml NaNO 2 solution, when the temperature dropped to 0°C, after stirring for 10 minutes, take 60mg rGO and add it into the beaker, stop the reaction after stirring for 10h, centrifuge and wash with absolute ethanol, hydrochloric acid and deionized water respectively, after the washing i...

Embodiment 2

[0058] A preparation method of supercapacitor electrode material NiCoMn-LDH / functionalized graphene, comprising the following steps:

[0059] (1) Preparation of functionalized graphene

[0060] Graphene oxide was prepared by the modified Hummers method. After the tube furnace was heated to 800°C, about 0.1 g of ground graphene oxide was put into a crucible each time, and the crucible was placed in the tube furnace, and it was taken out after about 120 seconds to obtain thermally reduced graphene oxide (rGO).

[0061] Take 1.7g of p-aminobenzoic acid and put it into a 100mL beaker containing 5mL of concentrated hydrochloric acid and 10mL of deionized water and cool it to 0°C, then add 3 mL of 0.3g / ml NaNO 2 solution, when the temperature dropped to 0°C, after stirring for 10 minutes, take 60mg rGO and add it into the beaker, stop the reaction after stirring for 14h, centrifuge and wash with absolute ethanol, hydrochloric acid and deionized water respectively, after the washing...

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Abstract

The invention relates to a preparation method of a supercapacitor electrode material NiCoMn-LDH / functionalized graphene, and belongs to the technical field of electrochemical materials. The preparation method comprises the following three steps: (1) preparing functionalized graphene, (2) preparing NiCoMn-LDH, and (3) preparing the supercapacitor electrode material NiCoMn-LDH / functionalized graphene (FGN). The supercapacitor electrode material NiCoMn-LDH / functionalized graphene synthesized by the invention has relatively high capacity and excellent cycle stability, and meanwhile, the assembled asymmetric supercapacitor has relatively high energy density and power density and relatively good cycle stability; meanwhile, the synthesis method is simple, convenient and easy to operate, the cost is relatively low, few types of reagents are needed, the method is environment-friendly, and the problem of large-scale application of the LDH material in supercapacitors is solved.

Description

technical field [0001] The invention relates to a preparation method of a supercapacitor electrode material NiCoMn-LDH / functionalized graphene, belonging to the technical field of electrochemical materials. Background technique [0002] With the increasing consumption of fossil energy such as oil and coal, as well as the pollution and greenhouse effect brought about by their use, it is particularly important to seek a new type of energy with low consumption, high energy storage, and clean and pollution-free. Supercapacitors have the advantages of high specific capacity, high power density, high rate performance, and long cycle life. They have very broad prospects for energy storage applications. Supercapacitors are mainly composed of electrodes, electrolytes, and diaphragms. Among them, electrode materials play a decisive role in the performance of supercapacitors, and research and preparation of high-performance electrode materials play a vital role in the development of su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/30
CPCH01G11/86H01G11/30Y02E60/13
Inventor 田华来媛楠李旺王林于志凤
Owner YANSHAN UNIV