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a mn 0.12 co 0.94 ni 0.51 o 2 Preparation method of ultrathin nanosheet supercapacitor material

A technology of supercapacitors and nanosheets, which is applied in hybrid capacitor electrodes, electrolytic inorganic material coatings, nanotechnology, etc., can solve problems such as poor rate cycle stability and complex preparation methods of multi-component composite materials, achieve excellent rate performance, and expand preparation methods Effects on the field of application and good electrochemical performance

Inactive Publication Date: 2016-09-07
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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.], the research on transition metal oxides has shifted When it comes to ternary or even multi-component composite materials, however, the preparation method of multi-component composite materials is 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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  • a mn <sub>0.12</sub> co <sub>0.94</sub> ni <sub>0.51</sub> o <sub>2</sub> Preparation method of ultrathin nanosheet supercapacitor material
  • a mn <sub>0.12</sub> co <sub>0.94</sub> ni <sub>0.51</sub> o <sub>2</sub> Preparation method of ultrathin nanosheet supercapacitor material
  • a mn <sub>0.12</sub> co <sub>0.94</sub> ni <sub>0.51</sub> o <sub>2</sub> Preparation method of ultrathin nanosheet supercapacitor material

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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 present invention relates to a kind of Mn 0.12 co 0.94 Ni 0.51 o 2 The preparation method of the ultra-thin nanosheet supercapacitor material comprises: mixing manganese nitrate solution, cobalt nitrate solution, and nickel nitrate solution with a volume ratio of 1:1:1, adding additives and mixing evenly to obtain an electrolyte; in a three-electrode system Under the conditions of electrochemical deposition technology, the constant potential method is used to electrodeposit the electrolyte for 20-40 minutes. After the reaction is completed, the sample is sent to a vacuum drying oven for drying, followed by annealing in a tube furnace for 2-3 hours to obtain . The method is simple, economical and easy to operate, and the prepared Mn 0.12 co 0.94 Ni 0.51 o 2 Ultrathin nanosheets have potential applications in supercapacitors, lithium-ion battery materials, etc.

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 Patents(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