Preparation method of nickel-based metal organic framework derived nickel diselenide/reduced graphene oxide composite material

A nickel diselenide, organic framework technology, applied in the directions of metal selenide/telluride, binary selenium/tellurium compound, graphene, etc., can solve problems such as application limitation, poor conductivity, shedding, etc. The effect of small size and large specific surface area

Pending Publication Date: 2021-10-19
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, its application in electrochemical energy storage materials is limited due to its poor conductivity.
Transition metal selenides, as a class of electrode materials, have high theoretical specific capacitance and higher conductivity compared with the same group of sulfides, but they will also fall off due to the expansion and contraction of the electrode material during the charge-discharge cycle.

Method used

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  • Preparation method of nickel-based metal organic framework derived nickel diselenide/reduced graphene oxide composite material
  • Preparation method of nickel-based metal organic framework derived nickel diselenide/reduced graphene oxide composite material
  • Preparation method of nickel-based metal organic framework derived nickel diselenide/reduced graphene oxide composite material

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Embodiment 1

[0036] This embodiment provides a method for preparing a nickel diselenide / reduced graphene oxide composite material derived from a nickel-based metal organic framework, the preparation method comprising the following steps:

[0037] (1) Add 133mg nickel nitrate hexahydrate and 146mg hexa(4-carboxyphenoxy)cyclotriphosphazene (CTP-COOH) into 28mL N-N dimethylformamide solution and stir at room temperature for 10min to obtain mixed solution A ;

[0038] Take 5mL of graphene oxide solution (2mg / mL) and add it to 23mL of N-N dimethylformamide solution, sonicate the probe in an ice bath for 20min to obtain solution B;

[0039] (2) Add 20mL of solution B into the mixed solution A, and reflux and stir at 160°C for 2h to obtain the mixed solution C;

[0040](3) The mixed solution C was washed and centrifuged three times with N-N dimethylformamide and tetrahydrofuran solutions respectively, and then vacuum-dried at room temperature for 6 hours to obtain a precursor, which was mixed wi...

Embodiment 2

[0042] This embodiment provides a method for preparing a nickel diselenide / reduced graphene oxide composite material derived from a nickel-based metal organic framework, the preparation method comprising the following steps:

[0043] (1) Add 133mg nickel nitrate hexahydrate and 146mg hexa(4-carboxyphenoxy)cyclotriphosphazene (CTP-COOH) into 28mL N-N dimethylformamide solution and stir at room temperature for 10min to obtain mixed solution A ;

[0044] Take 5mL of graphene oxide solution (2mg / mL) and add it to 23mL of N-N dimethylformamide solution, sonicate the probe in an ice bath for 20min to obtain solution B;

[0045] (2) Add 20mL of solution B into mixed solution A, and stir at reflux at 160°C for 2 hours to obtain mixed solution C;

[0046] (3) The mixed solution C was washed with N-N dimethylformamide and tetrahydrofuran solutions, centrifuged three times, and vacuum-dried at room temperature for 6 hours, and selenium powder (mass ratio 1:5) was mixed with selenium pow...

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Abstract

The invention provides a preparation method of a nickel-based metal organic framework derived nickel diselenide / reduced graphene oxide composite material, and the nickel diselenide / reduced graphene oxide composite material prepared by the method has a nano-particle structure and a large specific surface area, can effectively improve the ion transmission rate, and improves the specific capacitance. The problems of poor conductivity, poor cycle performance and the like of nickel-containing electrodes are solved.

Description

technical field [0001] The invention relates to a preparation method of a nickel diselenide / reduced graphene oxide composite material derived from a nickel-based metal organic framework. Background technique [0002] Supercapacitor is a new type of energy storage device, which has the characteristics of high power density, short charging time, long service life, good temperature characteristics, energy saving and environmental protection, so it has a wide range of uses. The excellent electrochemical properties of transition metal oxides make them ideal candidates for high-performance pseudocapacitive electrode materials. Among them, the excellent electrochemical stability and high theoretical specific capacitance of nickel oxide-based materials, coupled with their advantages of low toxicity, low cost and abundant resources, are regarded as very promising electrode materials. However, its application in electrochemical energy storage materials is limited due to its poor cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01B19/04H01G11/30B82Y40/00B82Y30/00
CPCC01B32/184C01B19/007H01G11/30B82Y30/00B82Y40/00C01P2004/80C01P2006/40C01P2004/03C01P2002/72C01P2004/64
Inventor 史晓艳刘秋南朱崇泽庄明训孙志鹏邵涟漪余锦超
Owner GUANGDONG UNIV OF TECH
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