A kind of preparation method of ternary metal oxide nanostructure supercapacitor electrode

A supercapacitor, nanostructured technology, applied in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, etc., to achieve the effects of high yield, increased surface area, and short reaction time

Active Publication Date: 2019-06-18
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are still deficiencies in the reported methods, and it is urgent to optimize and improve

Method used

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  • A kind of preparation method of ternary metal oxide nanostructure supercapacitor electrode
  • A kind of preparation method of ternary metal oxide nanostructure supercapacitor electrode
  • A kind of preparation method of ternary metal oxide nanostructure supercapacitor electrode

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1, Zn and Mo molar ratio are the Zn of 2:2 3 Mo 2 o 9 Electrode preparation

[0030] (1) Take 0.02M (NH 4 ) 6 Mo 7 o 24 4H 2 O solution and 2M HNO 3 The solution was mixed uniformly at a volume ratio of 2:1, then placed in a water bath at 85°C and heated for 60 minutes, and the resulting product was filtered and dried to obtain MoO 3 nano precursors;

[0031] (2) 0.288g (molar weight is 2mmol) MoO 3 The nano-precursor was placed on a heating stage at 350 °C, and 2 mL, 5 mM zinc acetate (Zn(CH 3 COO) 2 ) in ethanol solution, heated for 0.5h; the mixture was added to the mixed solution of 100mL zinc acetate and urotropine (the concentrations of zinc acetate and urotropine in the mixed solution were both 20mM), reacted at 95°C for 10h, and obtained The product is filtered and dried to obtain ternary Zn 3 Mo 2 o 9 Nano ring flake material;

[0032] (3) The ternary Zn 3 Mo 2 o 9The nano-annular flake material is mixed and dissolved in N-methylpy...

Embodiment 2

[0036] Embodiment 2, Zn and Mo molar ratio are the Zn of 3:2 3 Mo 2 o 9 Electrode preparation

[0037] (1) Take 0.02M (NH 4 ) 6 Mo 7 o 24 4H 2 O solution and 2M HNO 3 The solution was mixed uniformly at a volume ratio of 2:1, then placed in a water bath at 85°C and heated for 60 minutes, and the resulting product was filtered and dried to obtain MoO 3 nano precursors;

[0038] (2) 0.288g MoO 3 The nano-precursor was placed on a heating stage at 350 °C, and 2 mL, 5 mM zinc acetate (Zn(CH 3 COO) 2 ) in ethanol solution, heated for 0.5h; the mixture was added to the mixed solution of 150mL zinc acetate and urotropine (the concentrations of zinc acetate and urotropine in the mixed solution were both 20mM), reacted at 95°C for 10h, and obtained The product is filtered and dried to obtain ternary Zn 3 Mo 2 o 9 Nano ring flake material;

[0039] (3) The ternary Zn 3 Mo 2 o 9 The nano-annular flake material is mixed and dissolved in N-methylpyrrolidone as an active ...

Embodiment 3

[0048] Embodiment 3, the Zn that Zn and Mo molar ratio are 4:2 3 Mo 2 o 9 Electrode preparation

[0049] (1) Take 0.02M (NH 4 ) 6 Mo 7 o 24 4H 2 O solution and 2M HNO 3 The solution was mixed uniformly at a volume ratio of 2:1, then placed in a water bath at 85°C and heated for 60 minutes, and the resulting product was filtered and dried to obtain MoO 3 nano precursors;

[0050] (2) 0.288g MoO 3 The nano-precursor was placed on a heating stage at 350 °C, and 2 mL, 5 mM zinc acetate (Zn(CH 3 COO) 2 ) in ethanol solution, heated for 0.5h; the mixture was added to the mixed solution of 200mL zinc acetate and urotropine (the concentrations of zinc acetate and urotropine in the mixed solution were both 20mM), reacted at 95°C for 10h, and obtained The product is filtered and dried to obtain ternary Zn 3 Mo 2 o 9 Nano ring flake material;

[0051] (3) The ternary Zn 3 Mo 2 o 9 The nano-annular flake material is mixed and dissolved in N-methylpyrrolidone as an activ...

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Abstract

The invention discloses a preparation method of a ternary metal oxide nanometer structure supercapacitor electrode. The method comprises the steps that firstly, MoO3 is prepared through a hydrothermalmethod, then, a ternary Zn3Mo2O9 nanometer annular sheet material is prepared through MoO3, and finally Zn3Mo2O9 is adopted as active materials to be mixed with conductive materials and an adhesive to obtain the electrode. The specific capacitance of the Zn3Mo2O9 electrode prepared through the method reaches up to 1184.6 Fg<-1>, and is the highest value reported in public under the same testing condition currently on the basis of the material; the retention ratio of the specific capacitance of the electrode obtained after 1000-time constant current charging and discharging can still reach 71.3%, and the capacitance retention rate is high.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor preparation methods using ternary metal oxides as electrode materials, and in particular relates to high-performance ternary Zn applied to electrodes of supercapacitors. 3 Mo 2 o 9 Preparation of nano-annular flake materials. Background technique [0002] Society's need for cleaner, safer, and more efficient energy sources has inspired researchers to seek innovative ways to use nanomaterials for energy applications, including energy storage devices such as lithium-ion batteries and supercapacitors. Supercapacitors, also known as electrochemical capacitors, are promising energy storage devices due to their high power density, high energy density, good cycle stability, and long service life. However, the energy density of carbon-based supercapacitors currently in commercial use is not high, which greatly limits the development of supercapacitors. Nanomaterials have become a research hotsp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/46
CPCY02E60/13
Inventor 李国华晋华东操梦雅李盼盼李婉青陈志成
Owner ANHUI UNIVERSITY
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