Oxalate nanosheet array thin-film electrode and preparation method thereof

A nanosheet array and thin-film electrode technology, applied in the direction of electrodes, nanotechnology, nanotechnology, etc., to achieve the effects of high electrochemical activity, small contact resistance, and simplified assembly steps

Active Publication Date: 2019-01-25
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the invention of a simple and general method for preparing highly ordered arrays of oxalate nanosheets (especially transition metal oxalates such as nickel oxalate or cobalt oxalate, etc.) has not been described in the literature.

Method used

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  • Oxalate nanosheet array thin-film electrode and preparation method thereof
  • Oxalate nanosheet array thin-film electrode and preparation method thereof
  • Oxalate nanosheet array thin-film electrode and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0035] Ultrasonic etching treatment of the conductive substrate: wash the foamed nickel with absolute ethanol and deionized water in sequence, place the foamed nickel after deionized water cleaning in a 3.0mol / L hydrochloric acid solution for 20 minutes, and ultrasonically etch The foamed nickel after etching is cleaned with deionized water;

[0036] Preparation of oxalate nanosheet array thin film electrodes:

[0037]Step 1. Add 70 mL of deionized water to a 100 mL hydrothermal kettle, then add 2 mmol of ammonium oxalate, stir magnetically for 30 minutes, then add 2 mmol of nickel nitrate, and stir magnetically for 20 minutes to obtain a mixed solution;

[0038] Step 2. Put the nickel foam treated by ultrasonic etching into the mixed solution of step 1, seal the hydrothermal kettle to carry out hydrothermal reaction; the temperature of hydrothermal reaction is 140°C, and the time of hydrothermal reaction is 4h;

[0039] Step 3, taking out the nickel foam, rinsing with deioni...

Embodiment 2

[0043] Ultrasonic etching treatment of the conductive substrate: wash the foamed nickel with absolute ethanol and deionized water in sequence, place the foamed nickel after deionized water cleaning in a 3.0mol / L hydrochloric acid solution for 20 minutes, and ultrasonically etch The foamed nickel after etching is cleaned with deionized water;

[0044] Preparation of oxalate nanosheet array thin film electrodes:

[0045] Step 1. Add 70 mL of deionized water to a 100 mL hydrothermal kettle, then add 2 mmol of ammonium oxalate, stir magnetically for 30 minutes, then add 2 mmol of nickel nitrate, and stir magnetically for 20 minutes to obtain a mixed solution;

[0046] Step 2. Put the nickel foam treated by ultrasonic etching into the mixed solution of step 1, seal the hydrothermal kettle to carry out hydrothermal reaction; the temperature of hydrothermal reaction is 140°C, and the time of hydrothermal reaction is 15h;

[0047] Step 3, taking out the nickel foam, rinsing with deio...

Embodiment 3

[0050] Ultrasonic etching treatment of the conductive substrate: wash the foamed nickel with absolute ethanol and deionized water in sequence, place the foamed nickel after deionized water cleaning in a 3.0mol / L hydrochloric acid solution for 20 minutes, and ultrasonically etch The foamed nickel after etching is cleaned with deionized water;

[0051] Preparation of oxalate nanosheet array thin film electrodes:

[0052] Step 1. Add 70 mL of deionized water to a 100 mL hydrothermal kettle, then add 2 mmol of ammonium oxalate, stir magnetically for 30 minutes, then add 2 mmol of cobalt nitrate, and stir magnetically for 20 minutes to obtain a mixed solution;

[0053] Step 2. Put the nickel foam treated by ultrasonic etching into the mixed solution of step 1, seal the hydrothermal kettle and carry out hydrothermal reaction. The temperature of hydrothermal reaction is 140°C, and the time of hydrothermal reaction is 4h;

[0054] Step 3, taking out the nickel foam, rinsing with deio...

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Abstract

The invention discloses an oxalate nanosheet array thin-film electrode comprising a conductive substrate and an oxalate nanosheet array thin-film attached to the conductive substrate, and further discloses a preparation method of the oxalate nanosheet array thin-film electrode. The oxalate nanosheet array thin-film electrode is characterized in that nickel oxalate or cobalt oxalate serves as an active material, and preparation of the active material and combination of the active material and the conductive substrate are completed synchronously; assembly steps of a traditional powder electrodematerial is simplified, and the preparation process is simple and convenient; and the obtained oxalate nanosheet array thin-film is highly ordered and has the characteristic of oriented growth perpendicular to the surface of the conductive substrate, and formed porous channels and ordered physical structures facilitate diffusion and migration of an electrolyte and electrons. The oxalate nanosheetarray thin-film electrode is high in electrochemical activity, and therefore can be directly used as an electrode material of supercapacitors or a catalytic material for electrolysis of water.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanometer materials, and in particular relates to an oxalate nanosheet array film electrode and a preparation method thereof. Background technique [0002] Energy shortage and environmental pollution are problems that plague the sustainable development of human society. Vigorously developing green and clean energy and related energy storage technology is an effective means to solve this problem. [0003] Electric energy is one of the clean energy sources. In addition to using wires for transmission, more convenient use depends on portable rechargeable and dischargeable power sources. Supercapacitor is a new type of green energy storage device between traditional electrostatic capacitors and secondary batteries. It has the advantages of high power density, fast charge and discharge speed, long cycle life and good reversibility. In addition to the backup power supply, it is especially suitable f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04C25B11/06C25B1/04H01G11/30H01G11/86B82Y30/00
CPCB82Y30/00C25B1/04C25B11/051C25B11/075H01G11/30H01G11/86Y02E60/13Y02E60/36
Inventor 李纲全学军胡学步齐学强白薇扬向小倩
Owner CHONGQING UNIV OF TECH
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