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Metal organic framework core-shell porous nickel sulfide electrode material preparation method and application thereof

A metal-organic framework and electrode material technology, applied in the direction of hybrid capacitor electrodes, etc., can solve problems such as the inability to meet large-scale storage devices, and achieve the effects of increasing electroactive sites, good cycle performance, and improving specific capacitance

Active Publication Date: 2019-11-12
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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  • Metal organic framework core-shell porous nickel sulfide electrode material preparation method and application thereof
  • Metal organic framework core-shell porous nickel sulfide electrode material preparation method and application thereof
  • Metal organic framework core-shell porous nickel sulfide electrode material preparation method and application thereof

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specific Embodiment approach 1

[0033]A preparation method based on a metal-organic framework core-shell porous nickel sulfide electrode material, comprising the steps of:

[0034] 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;

[0035] 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;

[0036] 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

[0049] 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.

[0050] 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.

[0051] 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

[0053] A preparation method based on a metal-organic framework core-shell porous nickel sulfide electrode material, comprising the steps of:

[0054] 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;

[0055] 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;

[0056] 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 metal organic framework core-shell porous nickel sulfide electrode material preparation method and application thereof, which belong to the field of metal organic framework core-shell material preparation. Soluble nickel salt is dissolved in anhydrous methanol, a certain amount of trimesic acid is added after uniform stirring, the mixture is added to a high-pressure reaction kettle after stirring, the reaction kettle is placed in an oven and heated for a certain period of time, a spherical nickel metal organic framework material is obtained after drying and is ultrasonically dispersed in absolute ethanol, a sodium sulfide aqueous solution is then slowly added, placement in the oven for heating for a certain period of time is carried out, natural cooling to room temperature is carried out, the obtained mixture is centrifugally cleaned for three times by using the anhydrous methanol and deionized water, the obtained powder after vacuum drying is placed in a tubefurnace for calcination for a certain period of time, and the metal organic framework core-shell porous nickel sulfide electrode material is obtained. The trimesic acid is used as an organic ligand to form Ni-MOF, the pore size and the porosity can be controlled, and good cycle performance is obtained conveniently.

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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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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