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Ti3C2/NiCo2O4 composite electrode material and preparation method thereof

A composite electrode and hydrate technology, applied in hybrid capacitor electrodes, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as electrochemical performance needs to be improved, sheets are easy to accumulate and superimpose, and specific surface area is small , to achieve excellent electrochemical performance, low cost, and simple equipment

Inactive Publication Date: 2019-06-18
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with carbon materials, Ti 3 C 2 The conductivity of T is poor, the specific surface area is small, and its organ-like sheets are easy to accumulate and superimpose. These shortcomings indicate that Ti 3 C 2 The electrochemical performance needs to be improved, which greatly limits the Ti 3 C 2 Application as electrode material
And there is no information about Ti 3 C 2 / NiCo 2 o 4 Report on Composite Electrode and Its Synthetic Method

Method used

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  • Ti3C2/NiCo2O4 composite electrode material and preparation method thereof
  • Ti3C2/NiCo2O4 composite electrode material and preparation method thereof
  • Ti3C2/NiCo2O4 composite electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) 1g Ti 3 C 2 The powder was added to 200mL dimethyl sulfoxide and sonicated for 2 hours, centrifuged, washed with ethanol for 6 times, and dried in vacuum for later use;

[0029] (2) Weigh 0.481g (2.870mmol) of Ti which will be pretreated in step (1) 3 C 2 Add the powder into 80mL ethylene glycol, stir well for 1h to disperse; weigh 2mmol nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) and 4 mmol cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) join in the above-mentioned solution, continue to stir 2h; Take by weighing 2g polyvinylpyrrolidone (namely according to C 6 h 9 NO single molecule is calculated as mole 18mmol), joins in the above-mentioned solution, continues to stir 1h; Takes 18mmol urea and slowly adds in the solution, obtains suspension liquid; (illustration, in the embodiment of the present invention, molar ratio Ti 3 C 2 :Ni ion=1:0.348~2.091, to ensure Ti in the final product 3 C 2 and NiCo 2 o 4 The mass ratio is 1:0.5~3;)

[0030] (3...

Embodiment 2、3

[0038] Change the hydrothermal reaction temperature of step (3) in Example 1 to 160 and 200°C, and other operations are the same as in Example 1, and the product obtained is the same as in Example 1.

Embodiment 4、5

[0040] Change the hydrothermal reaction time of step (3) in Example 1 to 2 and 16h, and other other operations are the same as in Example 1, and the product obtained is the same as in Example 1.

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Abstract

The invention relates to a Ti3C2 / NiCo2O4 composite electrode material and a preparation method thereof. The mass ratio of Ti3C2 to NiCo2O4 in a composite electrode is 1 : 0.5 to 1 : 3. The preparationmethod comprises the steps of (1) dispersing pretreated Ti3C2 powder in an ethylene glycol solution; then adding cobalt salt, nickel salt and a surfactant, carrying out stirring, then adding urea, and continuing to carry out full stirring to obtain a turbid liquid; (2) carrying out a hydrothermal reaction on the turbid liquid obtained in the step (1) at 160-200 DEG C for 2-16 hours; and (3) calcining a product obtained in the step (2) at 300-400 DEG C for 1-4 hours to prepare the Ti3C2 / NiCo2O4 composite powder material. In the composite material prepared with the method, NiCo2O4 nanoparticlesare uniformly distributed on the surfaces and the interlayers of layered Ti3C2 particles to form a stable Ti3C2 / NiCo2O4 nano-composite structure; and the composite material has relatively large specific capacitance and relatively high charge-discharge stability.

Description

technical field [0001] The invention belongs to the technical field of composite electrode materials and preparation thereof, in particular to a Ti 3 C 2 / NiCo 2 o 4 Electrode material and its preparation method. Background technique [0002] A supercapacitor is an electrochemical energy storage device that combines the advantages of traditional battery high energy storage and traditional capacitor high power transmission, with higher power and longer cycle life. The electrode material is the key to determine the performance and cost of supercapacitors. [0003] HF etching method can be used from Ti 3 AlC 2 Materials prepared a new type of two-dimensional layered structure compound Ti 3 C 2 T(T=O,F,OH)(M.Naguib,M.Kurtoglu,V.Presser,J.Lu,J.J.Niu,M.Heon,L.Hultman,Y.Gogotsi,M.W.Barsoum.Two-dimensional nanocrystals produced by exfoliation ofTi 3 AlC 2 . Adv. Mater. 23 (2011) 4248–4253). This compound has a structure and properties similar to graphene, including excel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/46B82Y30/00B82Y40/00
Inventor 徐学文王显显葛晓丽刘鑫
Owner HEBEI UNIV OF TECH
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