A kind of electrode material nano-nickel oxide for supercapacitor and preparation method thereof

A nano-nickel oxide and supercapacitor technology, which is used in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, can solve the problems of cumbersome process and achieve the effects of reducing reaction temperature, good stability and increased conductivity.

Active Publication Date: 2017-07-07
RUYUAN YAO AUTONOMOUS COUNTY DONGYANGGUANG FORMED FOIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the intermediate product nickel hydroxide must be washed repeatedly to remove excess surfactant, and the process is cumbersome

Method used

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  • A kind of electrode material nano-nickel oxide for supercapacitor and preparation method thereof
  • A kind of electrode material nano-nickel oxide for supercapacitor and preparation method thereof
  • A kind of electrode material nano-nickel oxide for supercapacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Weigh 2.0g of nickel acetate and place it in the reaction vessel, then add 50ml of deionized water to it, stir to dissolve after ultrasonic dispersion, place the above solution in a closed high-temperature reactor, and then add 5ml of formic acid as an additive to 10℃min -1 The heating rate is increased to 500℃, and then kept at the corresponding temperature for 5h to obtain a green product;

[0033] (2) Filter and wash the cooled green products with deionized water and ethanol, and dry them at 50° C. for 6 hours to obtain green powder products.

Embodiment 2

[0035] (1) Weigh 3.0g of nickel acetate and place it in a reaction vessel, then add 50ml of deionized water to it, stir to dissolve after ultrasonic dispersion, place the above solution in a closed high-temperature reactor, and then add 7ml of acetic acid as an additive to 10℃min -1 The heating rate is increased to 400℃, and then kept at the corresponding temperature for 6h to obtain a green product;

[0036] (2) Filter and wash the cooled green product with deionized water and ethanol, and dry at 60°C for 6 hours to obtain a green powder product.

Embodiment 3

[0038] (1) Weigh 2.5g of nickel acetate and place it in a reaction vessel, then add 50ml of deionized water to it, stir to dissolve after ultrasonic dispersion, place the above solution in a closed high-temperature reactor, and add 10ml of acetic acid as an additive. 10℃min -1 The heating rate is increased to 300℃, and then kept at the corresponding temperature for 8h to obtain a green product;

[0039] (2) Filter and wash the cooled green product with deionized water and ethanol, and dry at 60° C. for 8 hours to obtain a green powder product.

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Abstract

The invention relates to a nano-nickel oxide electrode material for a supercapacitor and a preparation method thereof. Nickel acetate and water are added into a reaction container, dispersed evenly, transferred to a closed high-temperature reaction kettle, added with acetic acid, and reacted at 300-500°C. After 5-10h, powdery nickel oxide can be obtained by filtering, washing and drying. The prepared electrode material nano-nickel oxide for supercapacitor has a multi-layer stacked structure, its grain size is 5-10nm, and the thickness of the sheet is 20-50nm; The method is safe, non-toxic, easy to operate, high in efficiency, low in cost, and easy for industrial application, and the produced nano-nickel oxide has the characteristics of large specific capacitance, good conductivity, stable structure, good electrochemical cycle stability and the like.

Description

Technical field [0001] The invention relates to the field of preparation of inorganic nano materials, in particular to an electrode material nano nickel oxide for supercapacitors with excellent electrochemical performance and a preparation method thereof. Background technique [0002] The current large-scale applications are mainly "carbon-based electric double layer capacitors", which have high cycle life characteristics (10 6 Times), but there are problems such as low discharge capacity (less than 200F / g) and faster decay of large current charge and discharge capacitors. And another transition metal oxide-based "Faraday quasi-capacitance capacitor" has aroused great interest because of its high specific capacitance. The transition metal oxides include nickel oxide, ruthenium oxide, and manganese oxide. The charge storage process includes not only the storage on the electric double layer, but also the energy storage through the rapid redox reaction on the electrode, resulting in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/26H01G11/46H01G11/86
CPCY02E60/13
Inventor 何诚龙何凤荣张显郭义敏郭德超张啟文
Owner RUYUAN YAO AUTONOMOUS COUNTY DONGYANGGUANG FORMED FOIL CO LTD
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