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Carbon nanotube array electrode loaded with MnO<2> nanosheets on surface, and preparation method and application therefor

A carbon nanotube array, surface-loaded technology, applied in nanotechnology for materials and surface science, fuel cell-type half-cell and secondary battery-type half-cell, battery electrodes, etc., can solve electrode passivation, Carbon material side reactions, uncontrollable growth and other problems, to achieve the effect of reducing polarization, low cost, and conducive to wetting

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

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Problems solved by technology

But since Li 2 o 2 Growth is often uncontrollable and cannot fundamentally solve the problem
In addition, Li 2 o 2 Side reactions with carbon materials will cause electrode passivation
[0005] The ideal situation is to grow an effective catalyst on the surface of carbon tubes, such as transition metal oxides. This type of electrode design has important theoretical significance and practical application value for solving the problems of lithium-air batteries, but there is no such aspect at present. literature reports

Method used

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  • Carbon nanotube array electrode loaded with MnO&lt;2&gt; nanosheets on surface, and preparation method and application therefor
  • Carbon nanotube array electrode loaded with MnO&lt;2&gt; nanosheets on surface, and preparation method and application therefor
  • Carbon nanotube array electrode loaded with MnO&lt;2&gt; nanosheets on surface, and preparation method and application therefor

Examples

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Embodiment 1

[0044] Zinc nitrate hexahydrate and hexamethylenetetramine (with zinc nitrate hexahydrate molar ratio being 1) were dissolved in deionized water, then ammoniacal liquor (25wt%) was added, and the volume of ammoniacal liquor was 1 / 25 of the deionized volume, Stir evenly to prepare Zn 2+ A solution with a concentration of 0.04mol / L; soak nickel foam in a 0.5mol / L potassium permanganate solution for 1 hour, take it out, wash it repeatedly with deionized water, and then immerse it in a solution containing Zn 2+ In the solution, undergo hydrothermal reaction at 90°C for 6 hours, then wash and dry to obtain foamed nickel (Ni / ZnO) with zinc oxide nanorods on the surface; soak Ni / ZnO in 0.07mol / L glucose solution for 5 hours , take out and heat-treat at 600°C for 4 hours to obtain foamed nickel (Ni / ZnO / CNT) with zinc oxide and carbon nanotubes on the surface; then soak Ni / ZnO / CNT in 1.5mol / L NaOH solution for 48 hours Remove ZnO, wash and dry to obtain foamed nickel (Ni / CNT) loaded w...

Embodiment 2

[0054] Zinc nitrate hexahydrate and hexamethylenetetramine (with the zinc nitrate hexahydrate molar ratio being 1) were dissolved in deionized water, and then ammoniacal liquor (25wt%) was added, and the volume of ammoniacal liquor was 1 / 25 of the deionized volume, Stir evenly to prepare Zn 2+ A solution with a meter concentration of 0.01mol / L; soak nickel foam in a 0.5mol / L potassium permanganate solution for 1 hour, take it out, wash it repeatedly with deionized water, and then immerse it in a solution containing Zn 2+ In the solution, undergo a hydrothermal reaction at 80°C for 10 hours, then wash and dry to obtain foamed nickel (Ni / ZnO) with zinc oxide nanorods on the surface; immerse Ni / ZnO in 0.07mol / L glucose solution for 5 hours , take out and heat-treat at 600°C for 4 hours to obtain foamed nickel (Ni / ZnO / CNT) with zinc oxide and carbon nanotubes on the surface; then soak Ni / ZnO / CNT in 1.5mol / L NaOH solution for 48 hours Remove ZnO, and after washing and drying, nick...

Embodiment 3

[0058] Zinc nitrate hexahydrate and hexamethylenetetramine (with the zinc nitrate hexahydrate molar ratio being 1) were dissolved in deionized water, and then ammoniacal liquor (25wt%) was added, and the volume of ammoniacal liquor was 1 / 25 of the deionized volume, Stir well, prepare Zn 2+ A solution with a meter concentration of 0.02mol / L; the nickel foam is soaked in a 0.5mol / L potassium permanganate solution for 1 hour, taken out, washed repeatedly with deionized water, and immersed in a Zn-containing 2+In the solution, undergo hydrothermal reaction at 100°C for 4 hours, then wash and dry to obtain foamed nickel (Ni / ZnO) with zinc oxide nanorods on the surface; soak Ni / ZnO in 0.07mol / L glucose solution for 5 hours , take out and heat-treat at 600°C for 4 hours to obtain foamed nickel (Ni / ZnO / CNT) with zinc oxide and carbon nanotubes on the surface; then soak Ni / ZnO / CNT in 1.5mol / L NaOH solution for 48 hours Remove ZnO, and after washing and drying, nickel foam (Ni / CNT) loa...

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Abstract

The invention discloses a carbon nanotube array electrode loaded with MnO<2> nanosheets on the surface. Three-dimensional porous foamed nickel is taken as the substrate; the carbon nanotube array loaded with the MnO<2> nanosheets is directly grown on the substrate; and the MnO<2> nanosheets are grown on the surfaces of the carbon nanotubes to form a core-shell structure. The invention also discloses a preparation method and an application for the carbon nanotube array electrode loaded with the MnO<2> nanosheets. The carbon nanotube array electrode has the advantages of simple preparation process, low cost, short period, low energy consumption and the like, and is suitable for large-scale industrial production; the prepared core-shell structured array type electrode does not contain a binder; and due to the special three-dimensional porous structure of the foamed nickel and the porous structure and the catalytic performance of the MnO<2> nanosheets, the lithium air battery shows relatively low polarity and relatively high cyclic stability when the array electrode is used as a catalytic positive electrode.

Description

technical field [0001] The invention relates to the field of catalytic electrodes for lithium-air batteries, in particular to a surface loaded with MnO 2 Nanosheet carbon nanotube array electrode and its preparation method and application. Background technique [0002] Lithium-ion batteries are now widely used in mobile electronic devices, such as smartphones, laptops, etc., and have huge markets in grid energy storage, electric vehicles. However, the low energy density of lithium-ion batteries limits their application in the field of large-scale energy storage, such as large-scale use in electric vehicles. In contrast, the energy density of lithium-air batteries is higher than that of traditional lithium-ion batteries, but it has attractive application prospects in the field of large-scale energy storage, especially in electric vehicles. [0003] Different from the (Li-ion) shuttle mechanism of conventional Li-ion batteries, Li-air batteries work based on lithium peroxide...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/86H01M4/90H01M12/08B82Y30/00B82Y40/00
CPCH01M4/8657H01M4/8803H01M4/8825H01M4/8882H01M4/9016H01M4/9083H01M12/08B82Y30/00B82Y40/00Y02E60/10
Inventor 谢健屠芳芳曹灿唐之初曹高劭赵新兵
Owner ZHEJIANG UNIV