Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

NiCo2O4@NiMoO4 core-shell structure and preparation method thereof

A core-shell structure and shell technology is applied in the field of NiCo2O4@NiMoO4 core-shell structure and its preparation, which can solve the problems of lack of and affecting the electrochemical performance of core-shell structure materials.

Active Publication Date: 2019-06-21
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventors of the present invention have found that the thickness of the shell layer will affect the electrochemical performance of the core-shell structure material; however, the prior art has not yet proposed a NiCo 2 o 4 @NiMoO 4 The preparation method of the core-shell structure, which can control NiMoO in a simple way during the preparation process 4 The thickness of the shell layer, and thus the lack of optimization of NiCo by adjusting the thickness of the shell layer 2 o 4 @NiMoO 4 A means for the electrochemical performance of core-shell structures

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • NiCo2O4@NiMoO4 core-shell structure and preparation method thereof
  • NiCo2O4@NiMoO4 core-shell structure and preparation method thereof
  • NiCo2O4@NiMoO4 core-shell structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0047] On the one hand, the embodiment of the present invention provides a kind of NiCo 2 o 4 @NiMoO 4 A method for preparing a core-shell structure, comprising the steps of:

[0048] Step 1): NiCo growth on the current collector 2 o 4After the precursor nanostructure, the NiCo on the current collector 2 o 4 Precursor converted to NiCo 2 o 4 , to get NiCo 2 o 4 / Collector.

[0049] Specifically, the step 1) includes the following steps:

[0050] Step 11): transfer the current collector and the hydrothermal reaction solution into the hydrothermal reaction device, perform hydrothermal reaction, and grow NiCo on the current collector 2 o 4 Precursor nanowire structure, resulting in NiCo 2 o 4 Precursor / Current Collector.

[0051] Preferably, step 11) is specifically: preparing Ni(NO 3 ) 2 , Co(NO 3 ) 2 and the mixed solution of urea, stir evenly, transfer the mixed solution to the high-pressure reactor, put it vertically into the cleaned carbon cloth (the curr...

Embodiment 1

[0074] Step 1) hydrothermal reaction solution (the composition of this hydrothermal reaction solution is: 0.5mmol Ni(NO 3 ) 2 +1mmol Co(NO 3 ) 2 +2.5mmol urea+10mL deionized water) was poured into the autoclave, and the carbon cloth was soaked in the hydrothermal reaction solution. After the reaction kettle is sealed, it is placed in an oven for hydrothermal reaction. The temperature of the hydrothermal reaction is 160 ° C, and the time of the hydrothermal reaction is 4 hours. The nanowire-like NiCo grown on the surface of the carbon cloth is obtained. 2 o 4 Precursors (i.e., NiCo 2 o 4 precursor / carbon cloth). NiCo with deionized water and ethanol 2 o 4 After the precursor / carbon cloth was washed three times, it was dried in an oven at 60 °C for 24 hours. The dried NiCo 2 o 4 The precursor / carbon cloth was placed in a tube furnace and heat-treated under the protection of argon at a temperature of 300 °C for 2 hours to make nanowire-like NiCo 2 o 4 Precursor trans...

Embodiment 2

[0079] Step 1) hydrothermal reaction solution (the composition of this hydrothermal reaction solution is: 1mmol Ni(NO 3 ) 2 +2 mmol Co(NO 3 ) 2 +10mmol urea+20mL deionized water) was poured into the autoclave, and the carbon cloth was soaked in the hydrothermal reaction solution. After the reaction kettle is sealed, it is placed in an oven for hydrothermal reaction. The temperature of the hydrothermal reaction is 140 ° C, and the time of the hydrothermal reaction is 8 hours. The nanowire-shaped NiCo grown on the surface of the carbon cloth is obtained. 2 o 4 Precursors (i.e., NiCo 2 o 4 precursor / carbon cloth). NiCo with deionized water and ethanol 2 o 4 After the precursor / carbon cloth was washed three times, it was dried in an oven at a drying temperature of 80 °C for 12 hours. The dried NiCo 2 o 4 The precursor / carbon cloth was placed in a tube furnace and heat-treated under the protection of argon at a temperature of 400 °C for 1 hour to make nanowire-like NiCo ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a NiCo2O4@NiMoO4 core-shell structure and a preparation method thereof. The preparation method comprises following steps: after a NiCo2O4 precursor grows on a current collector, the NiCo2O4 precursor is converted into NiCo2O4, and a NiCo2O4 / current collector is obtained; a hydrothermal reaction solution and the NiCo2O4 / current collector are placed in a hydrothermal reaction device and subjected to a hydrothermal reaction, and a NiCo2O4@NiMoO4 precursor core-shell structure is obtained; a NiMoO4 precursor is converted into NiMoO4, and the NiCo2O4@NiMoO4 core-shell structure is obtained. The urea concentration of the hydrothermal reaction solution is controlled, so that the NiCo2O4@NiMoO4 core-shell structure with set shell thickness is obtained. The shell thicknesscan be regulated and controlled with a simple method in the preparation process of the NiCo2O4@NiMoO4 core-shell structure.

Description

technical field [0001] The invention relates to the technical field of preparation of electrode materials, in particular to a NiCo 2 o 4 @NiMoO 4 Core-shell structure and method for its preparation. Background technique [0002] Among the components of a supercapacitor, the electrode material is one of the important factors affecting its electrochemical performance. Metal oxides are a kind of pseudocapacitive electrode materials, which have higher specific capacitance than carbonaceous materials and higher cycle stability than conductive polymers. Among them, the double metal oxide NiCo 2 o 4 Inexpensive and environmentally friendly, its electrical conductivity is higher than that of single metal oxides NiO and Co 3 o 4 , so its electrochemical activity is higher, and it is a potential electrode material for supercapacitors. However, the double metal oxide NiCo 2 o 4 The structural strain generated during the electrochemical reaction will lead to rapid capacity fad...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01G53/00C01G51/00B82Y30/00H01G11/46H01G11/86
CPCY02E60/13
Inventor 吕春祥张惠芳袁淑霞
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com