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Preparation method of one-dimensional NiCo2O4 nanorod as supercapacitor material

A supercapacitor, nanorod technology, applied in the fields of nanotechnology, chemical instruments and methods, and nanotechnology for materials and surface science, which can solve the problems of limited commercial production, high reaction temperature, long reaction time, etc. The effect of reducing energy consumption, simplifying the preparation process and simple process

Inactive Publication Date: 2014-12-17
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current synthetic methods, such as hydrothermal method and sol-gel method, limit the commercial production because of their long reaction time and high reaction temperature.

Method used

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  • Preparation method of one-dimensional NiCo2O4 nanorod as supercapacitor material
  • Preparation method of one-dimensional NiCo2O4 nanorod as supercapacitor material
  • Preparation method of one-dimensional NiCo2O4 nanorod as supercapacitor material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A supercapacitor material NiCo 2 o 4 The preparation method of one-dimensional nanorod, the steps are as follows:

[0024] 1) Mix 1.5 mL of n-pentanol, 35 mL of cyclohexane and 1 g of cetyltrimethylammonium bromide and stir for 1 hour as the oil phase;

[0025] 2) Add 1.25mL of Ni(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 The mixed solution of O mixed aqueous solution and 2mL oxalic acid aqueous solution is used as the aqueous phase, Ni(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 The molar ratio of O is 1:2, Ni(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 The concentration of O mixed aqueous solution is 0.05 mol / L, and the concentration of oxalic acid aqueous solution is 1 mol / L;

[0026] 3) Under the condition of constantly stirring the oil phase, add the water phase solution drop by drop to form a water-in-oil system, react at room temperature for 2 hours under stirring, and age for 2 hours. Washing three times, then drying the separated product to obtain a prec...

Embodiment 2

[0033] A supercapacitor material NiCo 2 o 4 The preparation method of one-dimensional nanorods, steps 1)-3) are the same as in the examples to obtain the precursor;

[0034] 4) Put 0.9 g of the precursor prepared above in a muffle furnace and heat it to 600 °C at a heating rate of 1 °C / min, and hold it for 3 hours to obtain a black supercapacitor material NiCo 2 o4 Nano stave.

[0035] NiCo 2 o 4 The XRD and SEM images of the one-dimensional nanorods are similar to Example 1.

[0036] The prepared supercapacitor material NiCo 2 o 4 One-dimensional nanorods are used to prepare supercapacitor pole pieces, the method is: the prepared NiCo 2 o 4 Nanorods, conductive agent and binder were mixed uniformly according to the mass percentage of 65%: 20%: 15% to obtain a mixture, and 0.9 mL of N-methylpyrrolidone (NMP) was added dropwise to 30 mg of the mixture, ground evenly and evenly coated on the edge On the square nickel foam with a length of 2 cm, the two sides are respect...

Embodiment 3

[0039] A supercapacitor material NiCo 2 o 4 The preparation method of one-dimensional nanorods, steps 1)-3) are the same as in the examples to obtain the precursor;

[0040] 4) Put 1.0 g of the precursor prepared above in a muffle furnace and heat it to 400 °C at a heating rate of 1 °C / min, and keep it warm for 3 hours to obtain a black supercapacitor material NiCo 2 o 4 Nano stave.

[0041] NiCo 2 o 4 The XRD and SEM images of the one-dimensional nanorods are similar to Example 1.

[0042] The prepared supercapacitor material NiCo 2 o 4 One-dimensional nanorods are used to prepare supercapacitor pole pieces, the method is: the prepared NiCo 2 o 4 The nanorods, conductive agent and binder were mixed uniformly according to the mass percentage of 50%: 30%: 20% to obtain a mixture, and 1.4 mL of N-methylpyrrolidone (NMP) was added dropwise to 30 mg of the mixture, ground evenly and evenly coated on the edge On the square nickel foam with a length of 1.5 cm, the two side...

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Abstract

The invention discloses a preparation method of a one-dimensional NiCo2O4 nanorod as a supercapacitor material. The preparation method comprises the following steps of (1) mixing n-pentanol, cyclohexane and cetyltrimethylammonium bromide, and stirring for 1 hour to obtain a mixture used as an oil phase; (2) taking a mixed liquid of a nickel nitrate and cobalt nitrate mixed water liquid and an oxalic acid water liquid as a water phase; (3) dropwise adding the water-phase liquid under the condition of continuously stirring the oil phase to form a water-in-oil system, reacting at normal temperature, ageing, separating, cleaning and drying to obtain a precursor; and (4) placing the precursor into a muffle furnace to heat, and preserving the heat to obtain a target product for preparing a supercapacitor pole piece. The preparation method of the one-dimensional nanorod is simple in process, easy to operate and capable of reducing the energy consumption; the particle size of the product is relatively narrow in distribution range and easy to control; the micro-nano NiCo2O4 has relatively high specific capacity and relatively good rate capability and cycle performance; and the preparation method is free of environment pollution in the preparation process, environment-friendly and suitable for large-scale production.

Description

technical field [0001] The present invention relates to the preparation method of double metal oxide, more specifically, relate to a kind of supercapacitor material NiCo 2 o 4 Preparation method of one-dimensional nanorods. Background technique [0002] Double metal oxides are an important class of multifunctional materials, and their applications in supercapacitors have attracted wide attention. Among them, NiCo 2 o 4 Because of its high specific capacity, high power density, and long cycle life, it has been widely studied and applied. Micronized NiCo 2 o 4 It exhibits higher specific capacity, better rate performance and cycle performance. However, the current synthetic methods, such as hydrothermal method and sol-gel method, limit the commercial production because of the long reaction time and high reaction temperature. Therefore, the development of a simple, low-cost, environmentally friendly synthetic micro-nano NiCo 2 o 4 The method of materials has importan...

Claims

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Application Information

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IPC IPC(8): C01G53/00B82Y40/00B82Y30/00
Inventor 王一菁焦丽芳袁华堂安翠华王俊婷黄娅楠陈程成
Owner NANKAI UNIV
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