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Research of super-capacitor electrode material based on graded flowerlike NiCo2O4

A technology of supercapacitors and electrode materials, which is used in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors.

Inactive Publication Date: 2015-06-10
JILIN INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In recent years, various approaches have been used to control the synthesis of NiCo with favorable morphology and tunable functions. 2 o 4 Electrode materials, among nanowire arrays, nanosheets, sea urchins, etc., hierarchical flower-like porous materials are rarely reported. Among them, the simple, energy-saving, and efficient synthesis methods and precise control of the synthesis of transition metal oxides still need further exploration

Method used

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  • Research of super-capacitor electrode material based on graded flowerlike NiCo2O4
  • Research of super-capacitor electrode material based on graded flowerlike NiCo2O4
  • Research of super-capacitor electrode material based on graded flowerlike NiCo2O4

Examples

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Embodiment 1

[0016] Example 1: After ultrasonically mixing 1 mmol cobalt nitrate, 2 mmol nickel nitrate, 4 mmol ammonium fluoride and 8 mmol urea in distilled water, move them into a polytetrafluoro-lined autoclave, react at 120°C for 5 hours, and wash The final conductive substrate nickel mesh was placed in the solution. After the reaction was completed, the substrate was taken out and washed with water and dried in vacuum to obtain the precursor of tricobalt tetroxide. The precursor of tricobalt tetroxide was heat-treated at 350°C for 1.5h in the air atmosphere to obtain the hierarchical flower-shaped NiCo 2 o 4 .

Embodiment 2

[0017] Example 2: After ultrasonically mixing 1 mmol cobalt nitrate, 3 mmol nickel nitrate, 4 mmol ammonium fluoride and 8 mmol urea in distilled water, move them into a polytetrafluoro-lined autoclave, react at 120°C for 5 hours, and wash The final conductive substrate nickel mesh was placed in the solution. After the reaction was completed, the substrate was taken out and washed with water and dried in vacuum to obtain the precursor of tricobalt tetroxide. The precursor of tricobalt tetroxide was heat-treated at 350°C for 1.5h in the air atmosphere to obtain the hierarchical flower-shaped NiCo 2 o 4 .

Embodiment 3

[0018] Example 3: After ultrasonically mixing 1 mmol cobalt nitrate, 4 mmol nickel nitrate, 4 mmol ammonium fluoride and 8 mmol urea in distilled water, move them into a polytetrafluoro-lined autoclave, react at 120°C for 5 hours, and wash The final conductive substrate nickel mesh was placed in the solution. After the reaction was completed, the substrate was taken out and washed with water and dried in vacuum to obtain the precursor of tricobalt tetroxide. The precursor of tricobalt tetroxide was heat-treated at 350°C for 1.5h in the air atmosphere to obtain the hierarchical flower-shaped NiCo 2 o 4 .

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Abstract

The invention discloses a super-capacitor electrode material based on graded flowerlike NiCo2O4. The super-capacitor electrode material is graded flowerlike NiCo2O4 which is directly grown on the nickel mesh of a conductive substrate by a hydrothermal method. The flowerlike structure prepared by the method for preparing NiCo2O4 is formed by assembling nanometer sheets, and in-situ growth on the three-dimensional nickel mesh is realized by selecting experiment conditions; the preparation process is easy to operate and products are regular in shape; because the electrode material directly grows on the conductive substrate, thereby avoiding to add a conductive agent and a binding agent, greatly reducing electrode impedance, increasing the contact action between the graded structure electrode material and the conductive substrate, and increasing osmosis of electrolyte by loosely assembling the nanometer sheets.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor devices, in particular to hierarchical flower-shaped NiCo 2 o 4 Research on electrode materials for supercapacitors. Background technique [0002] With the advent of the world's energy crisis, the production and manufacture of power supply equipment with excellent performance (such as supercapacitors, lithium-ion batteries, etc.) has become more and more important. Due to their diverse valence electronic structures, rich physical and chemical properties, and applications in photoelectricity, catalysis, magnetism, and supercapacitors, transition metal oxides have become a hot research topic today. [0003] The electrochemical activity of electrode materials directly determines the capacitive performance of devices. Therefore, the development of active electrode materials has become the focus of ECs research and application. Generally, electrode materials for ECs include three categories: ...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/46H01G11/26
CPCY02E60/13H01G11/86H01G11/26H01G11/46
Inventor 韩丹丹徐鹏程史晋宜沈启慧于江微张立平
Owner JILIN INST OF CHEM TECH