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Method for preparing Mn0.12Co0.94Ni0.51O2 ultrathin nanosheet super capacitor material

A supercapacitor and nanosheet technology, applied in hybrid capacitor electrodes, electrolytic inorganic material coating, nanotechnology, etc., can solve the problems of poor rate cycle stability and complex preparation methods of multi-component composite materials, achieve excellent rate performance, and expand preparation methods. Simple effect with application field and preparation method

Inactive Publication Date: 2013-12-18
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, single transition metal oxide materials have the problem of poor rate capability or cycle stability [H.Jiang et al.Energy Environ.Sci., 2011,4,1813.], research on transition metal oxides has shifted When it comes to ternary or even multi-component composite materials, however, the preparation methods of multi-component composite materials are relatively complicated [J.P.Liu et al.Adv.Mater.,2011,18,2076], so developing a simple synthesis method has become an important challenge

Method used

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  • Method for preparing Mn0.12Co0.94Ni0.51O2 ultrathin nanosheet super capacitor material
  • Method for preparing Mn0.12Co0.94Ni0.51O2 ultrathin nanosheet super capacitor material
  • Method for preparing Mn0.12Co0.94Ni0.51O2 ultrathin nanosheet super capacitor material

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Experimental program
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Effect test

Embodiment 1

[0029] Mix the three solutions of 0.5M manganese nitrate, nickel nitrate and cobalt nitrate in equal volumes, add 5% (volume fraction) of dimethyl sulfoxide, and mix well to form the electrolyte. Relying on the Autolab electrochemical workstation platform, the constant potential method was used to electrodeposit the electrolyte at a voltage of -1V, and the deposition time was 40min. After the reaction is completed, rinse with deionized water for 2-3 times, send into a drying oven, and dry at 60° C. for 3 hours. Finally, it is sent into a tube furnace at 200°C and annealed for 2 hours to obtain Mn 0.12 co 0.94 Ni 0.51 o 2 Nanosheets.

Embodiment 2

[0031] Mix the three solutions of 0.5M manganese nitrate, nickel nitrate and cobalt nitrate in equal volumes, add 10% (volume fraction) of dimethyl sulfoxide, and mix well to form the electrolyte. Relying on the Autolab electrochemical workstation platform, the constant potential method was used to electrodeposit the electrolyte at a voltage of -1V, and the deposition time was 30min. After the reaction is completed, rinse with deionized water for 2-3 times, send into a drying oven, and dry at 60° C. for 3 hours. Finally sent to the tube furnace at 200 ℃, annealed for 3 hours to obtain Mn 0.12 co 0.94 Ni 0.51 o 2 Nanosheets.

Embodiment 3

[0033] Mix the three solutions of 0.5M manganese nitrate, nickel nitrate and cobalt nitrate in equal volumes, add 5% (volume fraction) of dimethyl sulfoxide, and mix well to form the electrolyte. Relying on the Autolab electrochemical workstation platform, the constant potential method was used to electrodeposit the electrolyte at a voltage of -1V, and the deposition time was 20min. After the reaction is completed, rinse with deionized water for 2-3 times, send into a drying oven, and dry at 70° C. for 3 hours. Finally sent to the tube furnace at 250 ℃, annealed for 3 hours to obtain Mn 0.12 co 0.94 Ni 0.51 o 2 Nanosheets.

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Abstract

The invention relates to a method for preparing a Mn0.12Co0.94Ni0.51O2 ultrathin nanosheet super capacitor material. The method comprises the following steps of mixing a manganese nitrate solution, a cobalt nitrate solution and a nickel nitrate solution, wherein the volume ratio of the manganese nitrate solution, the cobalt nitrate solution and the nickel nitrate solution is 1:1:1, adding an additive, then mixing uniformly, thus obtaining an electrolyte; under the condition of three electrode system electrochemical deposition technology, electrically depositing the electrolyte for 20-40 minutes by a potentiostatic method, after the reaction, sending the sample into a vacuum drying box for drying, in the following steps, annealing for 2-3 hours in a tubular furnace, thus obtaining the Mn0.12Co0.94Ni0.51O2 ultrathin nanosheet super capacitor material. The method is simple, economic and easy to operate, and the prepared Mn0.12Co0.94Ni0.51O2 ultrathin nanosheet has the potential of being used as materials of super capacitors and lithium ion batteries.

Description

technical field [0001] The invention belongs to the field of preparation of supercapacitor materials, in particular to a kind of Mn 0.12 co 0.94 Ni 0.51 o 2 Preparation method of ultrathin nanosheet supercapacitor material. Background technique [0002] In today's society, fossil energy is increasingly scarce, and human beings are facing serious energy and environmental problems. Research and development of environmentally friendly energy storage and recovery devices is one of the effective ways to solve energy problems. Supercapacitor is a new type of energy storage device developed in recent years, which has excellent characteristics such as high power density, long service life, wide operating temperature and rapid charge and discharge. It has huge application value and market potential in communication, automobile, electric power, railway, national defense, consumer electronics, etc., and has aroused extensive interest of scientists at home and abroad. As we all kn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D9/04H01G11/46B82Y40/00
CPCY02E60/13
Inventor 胡俊青李高李文尧徐开兵邹儒佳孙建庆王滕
Owner DONGHUA UNIV