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A composite of ternary cobalt-nickel-molybdenum oxide grown in situ on graphene and its two-step synthesis method

A nickel-molybdenum oxide, in-situ growth technology, applied in the direction of hybrid capacitor electrodes, etc., can solve the problem that the performance of electrode materials cannot meet the requirements of life and capacity at the same time, avoid invalid mass, avoid agglomeration, and facilitate uniform distribution. Effect

Active Publication Date: 2019-12-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The invention provides a composite material of in-situ growth of ternary cobalt-nickel-molybdenum oxide on graphene and its two-step synthesis method to solve the technical problem that the performance of existing electrode materials cannot meet the requirements of life and capacity at the same time

Method used

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  • A composite of ternary cobalt-nickel-molybdenum oxide grown in situ on graphene and its two-step synthesis method
  • A composite of ternary cobalt-nickel-molybdenum oxide grown in situ on graphene and its two-step synthesis method
  • A composite of ternary cobalt-nickel-molybdenum oxide grown in situ on graphene and its two-step synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1) Weighing 10 mg of graphene, fully stirring and ultrasonic;

[0050] 2) Weigh 1g of Co(NO 3 ) 2 , 50mg of urea and 50mg of NH 4 F powder is added to the graphene solution that has been sonicated, and stirred for 5 minutes;

[0051] 3) Weigh 20 mg of polyvinylpyrrolidone (PVP) powder and add it to the mixture, and stir for 5 minutes;

[0052] 4) react at 100°C for 6 hours;

[0053] 5) After the reaction is over, take the precipitate and wash it centrifugally with water and ethanol;

[0054] 6) Stir the washed precipitate with deionized water;

[0055] 7) Weigh 200mg of Ni(NO 3 ) 2 , 200 mg Na 2 MoO 4 The solid was added to the above solution and stirred;

[0056] 8) Measure 5mL of ethanol, add it dropwise to the mixture, and stir;

[0057] 9) Transfer to a polytetrafluoroethylene reactor and react at 100°C for 5 hours;

[0058] 10) After the reaction is over, take the precipitate and carry out centrifugal washing with water and ethanol;

[0059] 11) Dry in...

Embodiment 2

[0062] 1) Weighing 100mg of graphene and fully stirring and ultrasonic;

[0063] 2) Weigh 1g of Co(NO 3 ) 2 , 200mg of urea and 200mg of NH 4 F powder is added to the graphene solution that has been sonicated, and stirred for 5 minutes;

[0064] 3) Weigh 100 mg of polyvinylpyrrolidone (PVP) powder and add it to the above mixture, and stir for 5 minutes;

[0065] 4) react at 200°C for 12 hours;

[0066] 5) After the reaction is over, take the precipitate and wash it centrifugally with water and ethanol;

[0067] 6) Stir the washed precipitate with deionized water;

[0068] 7) Weigh 500mg of Ni(NO 3 ) 2 , 500mg Na 2 MoO 4 The solid was added to the above solution and stirred;

[0069] 8) Measure 15mL of ethanol, add it dropwise to the mixture, and stir;

[0070] 9) Transfer to a polytetrafluoroethylene reactor and react at 200°C for 10 hours;

[0071] 10) After the reaction is over, take the precipitate and carry out centrifugal washing with water and ethanol;

[00...

Embodiment 3

[0075] 1) Weighing 50mg of graphene, fully stirring and ultrasonic;

[0076] 2) Weigh 1g of Co(NO 3 ) 2 , 150mg of urea and 150mg of NH 4 F powder is added to the graphene solution that has been sonicated, and stirred for 5 minutes;

[0077] 3) Weigh 50 mg of polyvinylpyrrolidone (PVP) powder and add it to the mixture, and stir for 5 minutes;

[0078] 4) react at 150°C for 24 hours;

[0079] 5) After the reaction is over, take the precipitate and wash it centrifugally with water and ethanol;

[0080] 6) Stir the washed precipitate with deionized water;

[0081] 7) Weigh 300mg of Ni(NO 3 ) 2 , 300mg Na 2 MoO 4 The solid was added to the above solution and stirred;

[0082] 8) Measure 10mL of ethanol, add it dropwise to the mixture, and stir;

[0083] 9) Transfer to a polytetrafluoroethylene reactor and react at 150°C for 6 hours;

[0084] 10) After the reaction is over, take the precipitate and carry out centrifugal washing with water and ethanol;

[0085] 11) Dry ...

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Abstract

The invention provides a composite material of in-situ growth of ternary cobalt-nickel-molybdenum oxide on graphene and a two-step synthesis method thereof, and relates to the field of composite materials of graphene and metal oxides, and the composite material uses graphene as a substrate The cobalt oxide nanorods combined with the rod-like structure are grown in situ on the graphene substrate; the nickel-molybdenum oxide nanorods combined with the rod-like structure are grown in situ on the cobalt oxide nanorods. In the composite material provided by the present invention, the extremely thin graphene increases the specific surface area of ​​the material and increases the utilization rate of the active material; the graphene connects the cobalt oxide materials together to make the material conduct as a whole, avoiding the problem caused by the electrical conductivity. The failure of the material caused by weakness; the well-defined structure avoids the agglomeration of the material, forms a three-dimensional loose and porous morphology, further increases the specific surface area of ​​the material, and improves the capacitance of the material.

Description

technical field [0001] The invention relates to the field of graphene and metal oxide composite materials, in particular to a composite material in which ternary cobalt-nickel-molybdenum oxide is grown in situ on graphene and a two-step synthesis method thereof. Background technique [0002] With the rapid development of the global economy, the continuous consumption of fossil energy and the deteriorating environment, people urgently need to find an effective way to deal with the dual oppression of energy and the environment. How to carry out green regeneration of energy has become the primary issue for scientific researchers. . There is a serious shortage of various fossil energy reserves on the earth. It is predicted that oil will be exhausted around 2050, coal can still be used for another hundred years, and natural gas will no longer exist in thirty years. Yes, the environmental pollution problem caused by the use of fossil energy also forces people to actively search f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/46H01G11/32
CPCH01G11/32H01G11/46Y02E60/13
Inventor 王艳陈泽祥张继君闫欣雨周智雨吕慧芳
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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