Foamed-nickel-base loaded ZnCo2O4/ZnWO4 composite material synthesized according to hydrothermal method and application thereof

A composite material and a hydrothermal method are applied in the field of synthesizing foamed nickel-based ZnCo2O4/ZnWO4 composite materials by a hydrothermal method to achieve the effects of low cost and low toxicity of raw materials, reduction of energy consumption and cost, and improvement of electrochemical performance.

Inactive Publication Date: 2018-10-02
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, no ZnWO 4 with ZnCo 2 o 4 Preparation and Properties of Composite Electrode Materials Compositely Supported on Nickel Foam

Method used

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  • Foamed-nickel-base loaded ZnCo2O4/ZnWO4 composite material synthesized according to hydrothermal method and application thereof
  • Foamed-nickel-base loaded ZnCo2O4/ZnWO4 composite material synthesized according to hydrothermal method and application thereof
  • Foamed-nickel-base loaded ZnCo2O4/ZnWO4 composite material synthesized according to hydrothermal method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Hydrothermal Synthesis of Foamed Nickel-Based Supported ZnCo 2 o 4 / ZnWO 4 Composite materials, including the following steps:

[0040] (1) Cut the nickel foam into an appropriate size (1×2cm), wash the nickel foam in the order of hydrochloric acid, ethanol, and deionized water to remove impurities on the surface of the nickel foam, and dry it for later use.

[0041] (2) 1mmol zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O), 2mmol cobalt nitrate hexahydrate (Co (NO 3 ) 2 ·6H 2 O), 2mmol ammonium fluoride (NH 4 F), 5mmol urea (CO(NH 2 ) 2 ) was dissolved in 40ml deionized water, stirred evenly and ultrasonicated for 30min. Then transfer this solution together with the cleaned nickel foam to a 50ml polytetrafluoroethylene-lined reactor, conduct a hydrothermal reaction at 120°C for 5 hours, cool naturally, take out the nickel foam, wash and dry. The nickel foam after the hydrothermal reaction was then calcined at 400°C for 2 hours to obtain ZnCo supported on the...

Embodiment 2

[0044] Hydrothermal Synthesis of Foamed Nickel-Based Supported ZnCo 2 o 4 / ZnWO 4 Composite materials, including the following steps:

[0045] (1) Cut the nickel foam into an appropriate size (1×2cm), wash the nickel foam in the order of hydrochloric acid, ethanol, and deionized water to remove impurities on the surface of the nickel foam, and dry it for later use.

[0046] (2) 1mmol zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O), 2mmol cobalt nitrate hexahydrate (Co (NO 3 ) 2 ·6H 2 O), 2mmol ammonium fluoride (NH 4 F), 5mmol urea (CO(NH 2 ) 2 ) was dissolved in 60ml deionized water, stirred evenly and ultrasonicated for 30min. Then transfer this solution together with the cleaned nickel foam to a 50ml polytetrafluoroethylene-lined reactor, conduct a hydrothermal reaction at 130°C for 6 hours, cool naturally, take out the nickel foam, wash and dry. The nickel foam after the hydrothermal reaction was then calcined at 500°C for 3 hours to obtain ZnCo supported on the...

Embodiment 3

[0049] Hydrothermal Synthesis of Foamed Nickel-Based Supported ZnCo 2 o 4 / ZnWO 4 Composite materials, including the following steps:

[0050] (1) Cut the nickel foam into an appropriate size (1×2cm), wash the nickel foam in the order of hydrochloric acid, ethanol, and deionized water to remove impurities on the surface of the nickel foam, and dry it for later use.

[0051] (2) 1mmol zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O), 2mmol cobalt nitrate hexahydrate (Co (NO 3 ) 2 ·6H 2 O), 2mmol ammonium fluoride (NH 4 F), 5mmol urea (CO(NH 2 ) 2 ) was dissolved in 50ml deionized water, stirred evenly and ultrasonicated for 30min. Then transfer this solution together with the cleaned nickel foam to a 50ml polytetrafluoroethylene-lined reactor, conduct a hydrothermal reaction at 110°C for 4 hours, cool naturally, take out the nickel foam, wash and dry. The nickel foam after the hydrothermal reaction was then calcined at 300°C for 1 h to obtain ZnCo supported on the nic...

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Abstract

The invention belongs to the technical field of preparation of metal oxide composite materials, relates to the preparation of a foamed-nickel-based composite material, and particularly relates to a foamed-nickel-based ZnCo2O4/ZnWO4 composite material synthesized according to a hydrothermal method and an application thereof. The process comprises the steps of dissolving zinc nitrate hexahydrate, cobalt nitrate hexahydrate, ammonium fluoride and urea, immersing foamed nickel into the solution, performing a hydrothermal reaction for 4-6h at a temperature of 110-130 DEG C, and calcining to obtainZnCo2O4 loaded on the foamed nickel; and then placing the foamed nickel loaded with ZnCo2O4 into a mixed solution of zinc nitrate hexahydrate, sodium tungstate dihydrate and ammonium fluoride, performing the hydrothermal reaction for 5-7h at a temperature of 160-200 DEG C, and calcining to obtain a ZnCo2O4/ZnWO4 composite material loaded on the foamed nickel. The foamed-nickel-based ZnCo2O4/ZnWO4composite material is simple in process, good in repeatability, the raw materials are low in price and low in toxicity, and the production cycle is short, so that the energy consumption and cost are reduced, and the large-scale production is facilitated. The prepared composite material shows excellent electrochemical performance and has high energy density and power density. The prepared foamed-nickel-based ZnCo2O4/ZnWO4 composite material is utilized to prepare an asymmetric supercapacitor which can still keep a specific capacity of 98.5% after being charged and discharged for 5000 times, thereby conforming the requirement of being environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of preparation of metal oxide composite materials, and relates to the preparation of foamed nickel-based composite materials, in particular to the hydrothermal synthesis of foamed nickel-based ZnCo 2 o 4 / ZnWO 4 Composite materials and their applications. Background technique [0002] Since entering the 21st century, with the rapid development of science and technology and society, the demand for high-performance power supplies has been increasing. These power supply devices must not only have high energy density, but also have high power density. Although the traditional electrostatic capacitor has a large power density, its energy density is small, which cannot meet the actual needs. At the same time, the power requirements of electric vehicles are gradually increasing, and the current batteries cannot meet the requirements due to their low power density. In this context, supercapacitors have attracte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/86H01G11/24
CPCH01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 施伟东谢力夏腾孙林张科伟
Owner JIANGSU UNIV
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