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Metal oxide micro nanotube capable of being used as electrode material of supercapacitor and preparation method thereof

A supercapacitor, micro-nanotube technology, applied in hybrid capacitor electrodes, oxide/hydroxide preparation, hybrid/electric double-layer capacitor manufacturing, etc. and other problems, to achieve the effect of long cycle life, strong electron transport ability and good conductivity

Inactive Publication Date: 2015-03-11
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of poor conductivity, slow charge and discharge speed, fast capacitance attenuation and low cycle life of metal oxide electrode materials mentioned in the above background technology during the charging and discharging process of batteries or capacitors, and provide A metal oxide micro-nanotube with high porosity, fast charge and discharge speed, long cycle life, and strong electron transport capability that can be used as an electrode material for supercapacitors, and also provides a low production cost, simple operation, and easy industrial production Preparation method of metal oxide micro-nanotube

Method used

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  • Metal oxide micro nanotube capable of being used as electrode material of supercapacitor and preparation method thereof
  • Metal oxide micro nanotube capable of being used as electrode material of supercapacitor and preparation method thereof
  • Metal oxide micro nanotube capable of being used as electrode material of supercapacitor and preparation method thereof

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Embodiment 1

[0035] a kind of like figure 1 The NiO nanotubes that can be used as supercapacitor electrode materials according to the present invention are shown, and the metal oxide component in the NiO nanotubes is mainly NiO. The diameter of the NiO nanotube is 100nm-200nm, the length is 10μm-15μm, and the ratio of the hollow part of the NiO nanotube to the diameter of the NiO nanotube is 0.3-0.4:1.

[0036] A method for preparing the above-mentioned NiO nanotubes of the present embodiment, comprising the following steps:

[0037] (1) Add 4g of polyvinylpyrrolidone (the average molecular weight of polyvinylpyrrolidone is 630000) into 20g of dehydrated alcohol, and fully dissolve the polyvinylpyrrolidone in dehydrated alcohol by fully stirring at room temperature for 10 hours to obtain PVP solution;

[0038] (2) 2g of nickel acetate is added to the above-mentioned PVP solution, then the viscosity of the PVP solution is adjusted by adding 2g of deionized water, and the spinning solution i...

Embodiment 2

[0043] a kind of like image 3 The α-Fe that can be used for supercapacitor electrode material of the present invention shown 2 o 3 / Co 3 o 4 / NiO composite microtubes, the α-Fe 2 o 3 / Co 3 o 4 The metal oxide composition in NiO composite microtubes is mainly α-Fe 2 o 3 、Co 3 o 4 and NiO. The α-Fe 2 o 3 / Co 3 o 4 / NiO composite microtubes have a diameter of 1-2 μm and a length of 10 cm-15 cm. The α-Fe 2 o 3 / Co 3 o 4 / NiO composite microtube hollow part and α-Fe 2 o 3 / Co 3 o 4 The diameter ratio of the / NiO composite microtube is 0.6-0.7:1.

[0044] A kind of α-Fe mentioned above in this embodiment 2 o 3 / Co 3 o 4 The preparation method of / NiO composite microtube comprises the following steps:

[0045] (1) Add 4g of polyvinylpyrrolidone (the average molecular weight of polyvinylpyrrolidone is 150,000) into 18g of dehydrated alcohol, and fully dissolve the polyvinylpyrrolidone in dehydrated alcohol by fully stirring at room temperature for 10 hours ...

Embodiment 3

[0051] a kind of like Figure 4 Shown in the present invention can be used for the Co 3 o 4 Nanotubes (also known as Co 3 o 4 porous nanofibers), the Co 3 o 4 The metal oxide composition in nanotubes is mainly Co 3 o 4 . The Co 3 o 4 The diameter of the nanotube is 100-200nm, the length is 10-25μm, the Co 3 o 4 The hollow part of the nanotube and the Co 3 o 4 The ratio of the diameters of the nanotubes is 0.3-0.4:1.

[0052] A kind of Co as described above in this embodiment 3 o 4 A method for preparing nanotubes, comprising the steps of:

[0053] (1) Add 2g of polyvinylpyrrolidone (the average molecular weight of polyvinylpyrrolidone is 300,000) into 18g of dehydrated alcohol, and fully dissolve the polyvinylpyrrolidone in dehydrated alcohol by fully stirring at room temperature for 6 hours to obtain PVP solution;

[0054] (2) 1g of cobalt nitrate is added in the above-mentioned PVP solution, then the viscosity of the PVP solution is adjusted by adding 5g of...

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Abstract

The invention discloses a metal oxide micro nanotube capable of being used as an electrode material of a supercapacitor. Metal oxide components in the tube are mainly one or the compound of alpha-Fe2O3, Co3O4 and NiO. A preparation method for the metal oxide micro nanotube comprises the following steps of adding polyvinylpyrrolidone into absolute ethyl alcohol; fully mixing to fully dissolve; adding at least one of ferric salts, cobalt salts and nickel salts into the dissolved PVP (Polyvinyl Pyrrolidone) solution; then adjusting the viscosity and fully stirring to obtain spinning solution; stretching the spinning solution in an electrostatic spinning machine to form silks; placing the silks in a baking oven for drying and sintering to obtain the metal oxide micro nanotube. The metal oxide micro nanotube disclosed by the invention has the advantages of high porosity, high charging / discharging speed, long cycle life, high electronic transmission capacity and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic micro-nano materials and electrode materials, and in particular relates to a metal oxide micro-nano tube and a preparation method thereof. Background technique [0002] With the intensification of global environmental pollution and the excessive consumption of fossil fuels, the use of electrochemistry for energy storage has become an effective solution. Supercapacitors have attracted much attention due to their advantages such as high-efficiency storage, high cycle life, and safety. As electrode materials for supercapacitors, transition metal oxides use quasi-capacitance obtained from redox reactions to store energy. It is stable and has a good cycle life, so it has attracted much attention in the application of electrode materials. Studies have shown that micro-nano one-dimensional materials have more advantages because of their special confinement, high specific surface area an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/24H01G11/86
CPCY02E60/13H01G11/46C01B13/14C01P2004/13C01P2004/61C01P2004/62C01P2004/64H01G11/24H01G11/86
Inventor 沈湘黔王秋菊邹联立姚山山习小明
Owner CHANGSHA RES INST OF MINING & METALLURGY
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