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Preparation method and application of a metal-organic framework core-shell porous nickel sulfide electrode material

A metal-organic framework and electrode material technology, applied in the direction of hybrid capacitor electrodes, can solve the problems that cannot meet the needs of large-scale storage devices, and achieve good cycle characteristics, large capacity, and the effect of relieving physical stress

Active Publication Date: 2022-01-11
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there have been examples of using MOF as precursors to prepare materials such as sulfide and selenide, but they still cannot meet the needs of large-scale storage devices.

Method used

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  • Preparation method and application of a metal-organic framework core-shell porous nickel sulfide electrode material
  • Preparation method and application of a metal-organic framework core-shell porous nickel sulfide electrode material
  • Preparation method and application of a metal-organic framework core-shell porous nickel sulfide electrode material

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specific Embodiment approach 1

[0032]A preparation method based on a metal-organic framework core-shell porous nickel sulfide electrode material, comprising the steps of:

[0033] Step 1. Dissolve a certain quality of soluble nickel salt in a certain volume of anhydrous methanol, stir evenly, then add a certain quality of trimesic acid, and stir for a certain period of time to obtain a mixed solution A for use;

[0034] Step 2. Add the mixed solution A obtained in step 1 into a high-pressure reactor, place the reactor in an oven and heat it for a certain period of time, then cool it down to room temperature naturally, and centrifuge the obtained mixture for 3 times with anhydrous methanol and deionized water. Obtain spherical nickel metal organic framework material after drying, stand-by;

[0035] Step 3, ultrasonically dispersing a certain mass of the spherical nickel metal organic framework material prepared in step 2 in a certain volume of absolute ethanol, then slowly adding a certain volume of sodium s...

specific Embodiment approach 2

[0047] According to the preparation method of a metal-organic framework-based core-shell porous nickel sulfide electrode material described in the first embodiment, the metal-organic framework-based core-shell porous nickel sulfide electrode material is prepared, and the prepared Ni 3 S 4 materials for supercapacitor materials.

[0048] The cyclic voltammetry curve of the porous nickel sulfide electrode material based on the metal-organic framework core-shell described in this embodiment as a supercapacitor material is as follows Figure 9 As shown, the scanning speed of cyclic voltammetry is 5mv / s, 10mv / s, 20mv / s, 30mv / s, 50mv / s, and 80mv / s. It can be seen from the figure that at 5mv / s, 10mv / s , 20mv / s scanning speed, charging and discharging have obvious redox peaks.

[0049] The charge-discharge curve of the metal-organic framework-based core-shell porous nickel sulfide electrode material described in this embodiment is as follows: Figure 10 As shown, the charge and dis...

specific Embodiment approach 3

[0050] A preparation method based on a metal-organic framework core-shell porous nickel sulfide electrode material, comprising the steps of:

[0051] Step 1. Dissolve a certain quality of soluble nickel salt in a certain volume of anhydrous methanol, stir evenly, then add a certain quality of trimesic acid, and stir for a certain period of time to obtain a mixed solution A for use;

[0052] Step 2. Add the mixed solution A obtained in step 1 into a high-pressure reactor, place the reactor in an oven and heat it for a certain period of time, then cool it down to room temperature naturally, and centrifuge the obtained mixture for 3 times with anhydrous methanol and deionized water. Obtain spherical nickel metal organic framework material after drying, stand-by;

[0053] Step 3, ultrasonically dispersing a certain mass of the spherical nickel metal organic framework material prepared in step 2 in a certain volume of absolute ethanol, then slowly adding a certain volume of sodium ...

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Abstract

The invention discloses a preparation method and application of a metal-organic framework core-shell porous nickel sulfide electrode material, belonging to the field of metal-organic framework core-shell material preparation methods. The soluble nickel salt of the present invention is dissolved in anhydrous methanol, after stirring evenly, a certain quality of trimesic acid is added, after stirring, it is added into a high-pressure reaction kettle, after the reaction kettle is placed in an oven and heated for a certain period of time, it is naturally cooled to room temperature, After drying, the spherical nickel metal organic framework material was ultrasonically dispersed in absolute ethanol, and then slowly added sodium sulfide aqueous solution was placed in an oven and heated for a certain period of time, then naturally cooled to room temperature, and the obtained mixture was centrifuged with anhydrous methanol and deionized water After cleaning for three times, the powder obtained after vacuum drying was placed in a tube furnace and calcined for a certain period of time to obtain the metal-organic framework-based core-shell porous nickel sulfide electrode material. In the present invention, trimesic acid is used as an organic ligand to form Ni-MOF, and the pore diameter and porosity are controllable, which helps to obtain good cycle performance.

Description

technical field [0001] The invention belongs to the field of preparation methods of metal-organic framework core-shell materials; in particular, it relates to a preparation method and application of a metal-organic framework-based core-shell porous nickel sulfide electrode material. Background technique [0002] In recent years, due to the continuous acceleration of the world's industrialization process and the continuous increase in population, the global consumption of traditional energy such as fossil fuels has continued to increase and the ecological environment has deteriorated. Therefore, seeking a clean, stable, low-cost, high-efficiency alternative clean energy has become a research hotspot and development trend in the global energy field. New energy sources such as wind energy, solar energy, tidal energy, and geothermal energy that have attracted much attention have the advantages of being green, clean, environmentally friendly, and recyclable. However, the charact...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30
CPCH01G11/24H01G11/30Y02E60/13
Inventor 陈明华张鸿儒张家伟
Owner HARBIN UNIV OF SCI & TECH
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