Preparation method of cobalt nickel sulfide/foam nickel super capacitor electrode

A supercapacitor, cobalt-nickel sulfide technology, used in hybrid capacitor electrodes, hybrid/electrical double-layer capacitor manufacturing, etc., to achieve the effects of high specific surface area, good rate performance, and high-efficiency electron transport channels

Inactive Publication Date: 2016-11-23
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes an improved type of catalyst used during chemical reactions that have many advantages such as faster response times or better efficiency than traditional methods like heating up water molecules inside them. It allows for quicker movement of charged particles towards the active sites within the catalytic layers compared with other types of materials currently available. Additionally, this new method simplifies production processes while maintaining their effectiveness over longer periods of use. Overall, these technical improvements make possible applications where fast electronic transfer rates are needed without compromising energy storage capacity.

Problems solved by technology

This patented technical problem addressed by the present inventers relates to developing better ways to increase the specific capacity and speed capabilities of ultracapaces while also reducing their cost per unit area due to increased production costs associated therewith.

Method used

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  • Preparation method of cobalt nickel sulfide/foam nickel super capacitor electrode
  • Preparation method of cobalt nickel sulfide/foam nickel super capacitor electrode
  • Preparation method of cobalt nickel sulfide/foam nickel super capacitor electrode

Examples

Experimental program
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Embodiment 1

[0014] Dissolve 1 mmol of cobalt nitrate, 0.5 mmol of nickel nitrate, 0.25 mmol of thiourea, 0.25 mmol of ammonium fluoride, and 25 mg of polyvinylpyrrolidone in 30 mL of deionized water under magnetic stirring to form a homogeneous mixed solution, and then transfer the homogeneous mixed solution to a hydrothermal In the reactor, at the same time, the nickel foam substrate (10mm×10mm×1mm) was etched with a nitric acid solution with a molar concentration of 0.1mol / L for 5 minutes, washed and dried, then immersed in the reaction solution in the hydrothermal reactor, at 100°C After hydrothermal reaction for 5 hours, ultrathin sheets were grown and deposited on the nickel foam substrate to assemble a honeycomb hierarchical structure of cobalt nickel sulfide to form an active electrode. The prepared active electrode was used as the working electrode, the platinum sheet was used as the auxiliary electrode, and the HgO / Hg electrode was used as the reference electrode, immersed in 2mol...

Embodiment 2

[0016] Dissolve 0.75 mmol of cobalt nitrate, 0.75 mmol of nickel nitrate, 0.5 mmol of thiourea, 0.5 mmol of ammonium fluoride and 50 mg of polyvinylpyrrolidone in 30 mL of deionized water under magnetic stirring to form a homogeneous mixed solution, and then transfer the homogeneous mixed solution to water In the thermal reaction kettle, at the same time, the foamed nickel substrate (10mm×10mm×1mm) was etched with a nitric acid solution with a molar concentration of 0.1mol / L for 5min, washed and dried, then immersed in the reaction solution in the hydrothermal reaction kettle, at 130 ℃ hydrothermal reaction for 2 hours, and then grow and deposit ultra-thin sheets on the nickel foam substrate to assemble a honeycomb multi-level structure cobalt nickel sulfide to form an active electrode. The prepared active electrode was used as the working electrode, and the three-electrode system was assembled according to Example 1 to test the electrochemical performance. The specific capacit...

Embodiment 3

[0018] Dissolve 0.5 mmol of cobalt nitrate, 1 mmol of nickel nitrate, 0.5 mmol of thiourea, 0.25 mmol of ammonium fluoride, and 25 mg of polyvinylpyrrolidone in 30 mL of deionized water under magnetic stirring to form a homogeneous mixed solution, and then transfer the homogeneous mixed solution to a hydrothermal In the reaction kettle, at the same time, the nickel foam substrate (10mm×10mm×1mm) was etched with a nitric acid solution with a molar concentration of 0.1mol / L for 5 minutes, washed and dried, then immersed in the reaction solution in the hydrothermal reaction kettle, at 150°C Hydrothermal reaction for 5 hours, growth and deposition of ultra-thin lamellar honeycomb hierarchical cobalt nickel sulfide on the foamed nickel substrate (such as figure 1 shown) to form an active electrode. This type of electrode material has abundant pores, which is suitable for the rapid diffusion of electrolyte and is conducive to obtaining higher rate performance. The prepared electrod...

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Abstract

The invention discloses a preparation method of a cobalt nickel sulfide/foam nickel super capacitor electrode. According to the method, foam nickel, cobalt nitrate, nickel nitrate and thiocarbamide are used as raw materials; ammonium fluoride is used as an etching agent; polyvinylpyrrolidone is used as a morphology control agent; a hydrothermal reaction is performed in a hydrothermal reaction kettle at 100 to 180 DEG C for 2 to 8h; and nickel cobalt sulfide of an ultra-thin sheet layer-assembled cellular multi-stage structure deposits and grows on a foam nickel substrate, so that an active electrode is formed. The cobalt nickel sulfide electrode prepared by the preparation method provided by the invention can provide high pseudocapacitance, and has high electron and ion conductivity and excellent structure toughness at the same time, so that the specific capacitance and the rate capability of the capacitor can be comprehensively improved.

Description

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Claims

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Application Information

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Owner HENAN NORMAL UNIV
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