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NiCo2O4 nano flower-like composite material and preparation method thereof

A composite material, nickel cobalt oxide technology, used in nickel compounds, nanotechnology, chemical instruments and methods, etc., to achieve the effect of enhancing the ability to store electrons

Inactive Publication Date: 2019-10-18
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the porous nickel cobalt oxide nanosheet flower-like structure material (NiCo 2 o 4 -NF), and used as the counter electrode of dye-sensitized solar cells and supercapacitor electrode materials are rarely reported

Method used

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  • NiCo2O4 nano flower-like composite material and preparation method thereof
  • NiCo2O4 nano flower-like composite material and preparation method thereof
  • NiCo2O4 nano flower-like composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A preparation method of nickel cobaltate nano-flower composite material, comprising the following steps:

[0043] (1) Slowly pour 1,3 propylene glycol and isopropanol into a beaker to prepare a mixed solution, and continue stirring with a magnetic stirrer for 0.4h, so that the mixed solution is evenly mixed; wherein, 1,3 propylene glycol and isopropanol in the mixed solution The volume ratio is 3:1;

[0044] (2) Slowly add nickel acetate tetrahydrate and cobalt acetate tetrahydrate into the mixed solution of step (1) in sequence, and continue to stir for 0.8h with a magnetic stirrer, so that the mixed solution is evenly mixed; wherein, nickel acetate tetrahydrate and nickel acetate tetrahydrate The mass ratio of cobalt acetate is 1:2;

[0045] (3) Transfer the mixed solution of step (2) to a Teflon autoclave lined with polytetrafluoroethylene, put the Teflon autoclave into a blast drying oven, and set 155°C to react for 13h ;

[0046] (4) After being cooled to room t...

Embodiment 2

[0050] A preparation method of nickel cobaltate nano-flower composite material, comprising the following steps:

[0051] (1) Slowly pour 1,3 propylene glycol and isopropanol into a beaker to prepare a mixed solution, and continue stirring with a magnetic stirrer for 0.5h, so that the mixed solution is evenly mixed; wherein, 1,3 propylene glycol and isopropanol in the mixed solution The volume ratio is 3:1;

[0052] (2) Slowly add nickel acetate tetrahydrate and cobalt acetate tetrahydrate into the mixed solution of step (1) in sequence, and continue to stir for 1 hour with a magnetic stirrer, so that the mixed solution is evenly mixed; wherein, nickel acetate tetrahydrate and acetic acid tetrahydrate The mass ratio of cobalt is 1:2;

[0053] (3) Transfer the mixed solution of step (2) to a Teflon autoclave lined with polytetrafluoroethylene, put the Teflon autoclave into a blast drying oven, and set the reaction temperature at 160°C for 12 hours ;

[0054] (4) to be cooled ...

Embodiment 3

[0058] A preparation method of nickel cobaltate nano-flower composite material, comprising the following steps:

[0059](1) Slowly pour 1,3 propylene glycol and isopropanol into a beaker to prepare a mixed solution, and continue stirring with a magnetic stirrer for 0.6h, so that the mixed solution is evenly mixed; wherein, 1,3 propylene glycol and isopropanol in the mixed solution The volume ratio is 3:1;

[0060] (2) Slowly add nickel acetate tetrahydrate and cobalt acetate tetrahydrate into the mixed solution of step (1) successively, and continue stirring with a magnetic stirrer for 0.8-1.2h, so that the mixed solution is evenly mixed; wherein, nickel acetate tetrahydrate and The mass ratio of cobalt acetate tetrahydrate is 1:2;

[0061] (3) Transfer the mixed solution of step (2) to a Teflon autoclave lined with polytetrafluoroethylene, and put the Teflon autoclave into a blast drying oven, set 165°C for 11 hours ;

[0062] (4) to be cooled to room temperature, the solu...

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Abstract

The invention discloses a NiCo2O4 nano flower-like composite material (NiCo2O4-NF). The composite material is a flower-like structural material with loose NiCo2O4 nanosheets uniformly distributed at the surface. A cell assembled by using the composite material as a counter electrode exhibits superior photoelectric conversion performance: under the same conditions, photoelectric conversion efficiency of the dye-sensitized solar cell containing the NiCo2O4-NF counter electrode material is as high as 7.90% and is higher than that of 7.45% of a conventional cell containing commonly-used counter electrode noble metal platinum (Pt); and in addition, the NiCo2O4-NF exhibits better faradaic pseudocapacitance performance when used as an active electrode material: the specific capacitance reaches 817.5 F*g<-1>. The composite material provided by the invention is prepared by the one-step hydrothermal method, and has a simple preparation process, a low price and no pollution, can replace the Pt asa counter electrode to be used in the dye-sensitized solar cell and be used as an excellent active electrode to be used for supercapacitors, and has great application prospects in terms of energy storage.

Description

technical field [0001] The invention relates to the field of counter electrode materials for dye-sensitized solar cells and the field of active materials for supercapacitors, in particular to a nickel cobaltate nano-flower composite material and a preparation method thereof. Background technique [0002] With the rapid development of human society and the continuous improvement of human living standards, human demand for energy is also increasing. The existing energy structure is mainly based on fossil energy, supplemented by new energy such as solar energy, wind energy, tidal energy, geothermal energy, etc. Because of the non-renewability of fossil fuels and their adverse impact on the environment, the development and utilization of new energy It is imminent. The development of new energy and energy storage research are of great value to both human society and the earth's ecology, and will be one of the most decisive technical fields in the future world economy. As the mos...

Claims

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Application Information

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IPC IPC(8): C01G53/00B82Y40/00
CPCC01G53/00B82Y40/00C01P2004/32C01P2004/62C01P2006/40C01P2002/72C01P2004/03C01P2004/04
Inventor 姚吉鑫王雯李广
Owner ANHUI UNIVERSITY
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