Method of synthesizing mesoporous nickel cobalt oxide nanowire using hydrothermal method and application thereof

A technology of nickel cobaltate and nanowires, which is applied in the field of electrochemical energy storage, can solve the problems of high energy consumption, long reaction time, and easy introduction of impurities, and achieve high specific surface area, simple operation, and environmental friendliness

Inactive Publication Date: 2012-10-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the high-temperature solid-phase chemical reaction method is the traditional synthesis method of nickel cobaltate. Although the process is simple, the reaction time is long, the energy consumption is high, and the product particle size is large; a large amount of strain and defects are introduced in the mechanochemical synthesis process, and the dispersibility of the obtained product is poor; The particle size of the product obtained by the gel method is small and evenly distributed by adding a surfactant, but it is easy to introduce impurities; while the product synthesized by the liquid phase chemical precipitation method has an incomplete structure, and some metastable phases will be formed

Method used

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  • Method of synthesizing mesoporous nickel cobalt oxide nanowire using hydrothermal method and application thereof
  • Method of synthesizing mesoporous nickel cobalt oxide nanowire using hydrothermal method and application thereof
  • Method of synthesizing mesoporous nickel cobalt oxide nanowire using hydrothermal method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) 0.64g CoCl 2 ·6H 2 O, 0.32g NiCl 2 ·6H 2 O with 1.20g CO(NH 2 ) 2 Dissolve in 50ml deionized water, stir thoroughly with a magnetic stirrer to make the solution evenly mixed.

[0027] (2) Transfer the mixed solution in step (1) to a polytetrafluoroethylene-lined autoclave, heat to 100 °C, and keep the temperature constant for 10 hours to obtain a precursor solution.

[0028] (3) After the reactor is cooled to room temperature, filter the precursor solution obtained in step (2) to collect the precursor. Wash thoroughly with deionized water and dry in an oven at 60 °C to prepare the precursor.

[0029] (4) The dry precursor prepared in step (3) was placed in a muffle furnace and annealed at 250°C for 2 hours in an air atmosphere to obtain nickel cobaltate nanowires.

[0030] (5) The nickel cobaltate nanowires obtained in step (4) were characterized and tested for electrochemical properties. The results show that the nickel cobalt oxide nanowires synthesized by...

Embodiment 2

[0032] (1) 0.64g CoCl 2 ·6H 2 O, 0.32g NiCl 2 ·6H 2 O with 1.20g CO(NH 2 ) 2 Dissolve in 50ml deionized water, stir thoroughly with a magnetic stirrer to make the solution evenly mixed.

[0033] (2) Transfer the mixed solution in step (1) to a polytetrafluoroethylene-lined autoclave, heat to 100 °C, and keep the temperature constant for 10 hours to obtain a precursor solution.

[0034] (3) After the reactor is cooled to room temperature, filter the precursor solution obtained in step (2) to collect the precursor. Wash thoroughly with deionized water and dry in an oven at 60 °C to prepare the precursor.

[0035] (4) The dry precursor prepared in step (3) was placed in a muffle furnace and annealed at 200°C for 2 hours in an air atmosphere to obtain nickel cobaltate nanowires.

Embodiment 3

[0037] (1) 0.64g CoCl 2 ·6H 2 O, 0.32g NiCl 2 ·6H 2 O with 1.20g CO(NH 2 ) 2 Dissolve in 50ml deionized water, stir thoroughly with a magnetic stirrer to make the solution evenly mixed.

[0038] (2) Transfer the mixed solution in step (1) to a polytetrafluoroethylene-lined autoclave, heat to 100 °C, and keep the temperature constant for 10 hours to obtain a precursor solution.

[0039] (3) After the reactor is cooled to room temperature, filter the precursor solution obtained in step (2) to collect the precursor. Wash thoroughly with deionized water and dry in an oven at 60 °C to prepare the precursor.

[0040] (4) The dry precursor prepared in step (3) was placed in a muffle furnace and annealed at 300°C for 2 hours in an air atmosphere to obtain nickel cobalt oxide nanowires.

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Abstract

The invention relates to a method of synthesizing nickel cobalt oxide electrode material using a hydrothermal method and an application thereof. The method comprises dissolving CoCl2.6H2O, NiCl2.6H2O and CO(NH2)2 into an appropriate amount of deionized water, wherein the mole ratio of CoCl2.6H2O to NiCl2.6H2O is 1 : 2; uniformly stirring the mixed solution by using a magnetic stirrer, transferring the solution into an autoclave, heating the solution to 100 DEG C and keeping the temperature constant for 10 hours; cooling the solution to room temperature, filtering, washing and drying reactants, and then annealing the reactants for 2 hours in an air atmosphere of 250 DEG C. The method is simple to operate and environmental-friendly. The prepared nickel cobalt oxide nanowire is a spinel-type cubic phase and porous, has high purity and relatively high specific surface area, and can be used as electrode materials for super capacitors, with specific capacitance thereof being 722 F/g.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage, and in particular relates to a method for hydrothermally synthesizing mesoporous nickel cobaltate nanowires and an application thereof. Background technique [0002] Nickel cobalt oxide (NiCo 2 o 4 ) for the inverse spinel structure of AB 2 o 4 type composite oxide, in which nickel ions occupy the octahedral voids, and cobalt occupies all the tetrahedral voids and half of the octahedral voids. Its conductivity and electrochemical activity are much higher than those of single nickel and cobalt oxides, and the presence of Co 3+ / Co 2+ and Ni 3+ / Ni 2+ The redox pair, which has the advantages of low cost and environmental friendliness, can be used as a supercapacitor electrode material and has great application value. Therefore NiCo 2 o 4 The application of supercapacitors has gradually attracted people's attention. For example, Wei. et al [Te-Yu Wei et al., Adv. Mater., 2010...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00B82Y30/00H01G9/058
Inventor 王雪峰王雅兰王欢文
Owner TONGJI UNIV
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