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A kind of activation method of nickel salt etching graphite felt electrode

An activation method, graphite felt technology, applied in battery electrodes, electrochemical generators, circuits, etc., can solve the problems of further improvement of hydrophilicity and electrochemical activity, achieve low price, reduce preparation cost, and enhance stability Effect

Active Publication Date: 2021-10-29
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its hydrophilicity and electrochemical activity still need to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing an active graphite felt electrode for a nickel salt-etched liquid flow battery. The graphite felt is used as a base material, and the surface of the graphite felt is etched by coating a nickel salt solution and stepwise heating and sintering to obtain a nickel salt-etched liquid electrode. Active graphite felt electrodes for flow batteries, the specific operations are as follows:

[0021] 1) In terms of mass percentage, weigh 5% of the mass of graphite felt as nickel salt crystals with a purity of 99.0%, add an appropriate amount of water, and magnetically stir for 20 minutes until completely dissolved to obtain a nickel salt solution;

[0022] 2) uniformly coating the prepared nickel salt solution on the clean graphite felt surface;

[0023] 3) Place the graphite felt coated with the nickel salt solution in a high-temperature furnace, raise the temperature to 300°C at a heating rate of 10°C / min, keep it warm for 60 minutes, then raise the tempera...

Embodiment 2

[0026] A method for activating graphite felt electrodes etched by nickel salts. Using graphite felt as a base material, the surface of graphite felt is etched by coating a nickel salt solution and sintering in stages, and a large amount of oxygen functional groups and catalyst nickel are introduced to obtain nickel salt etched electrodes. Active graphite felt electrodes for corrosion flow batteries, the specific operation steps are as follows:

[0027] 1) In terms of mass percentage, weigh 10% of the mass of graphite felt as nickel salt crystals with a purity of 99.0%, add an appropriate amount of water, and magnetically stir for 20 minutes until completely dissolved to obtain a nickel salt solution;

[0028] 2) uniformly coating the prepared nickel salt solution on the clean graphite felt surface;

[0029] 3) Place the graphite felt coated with the nickel salt solution in a high-temperature furnace, raise the temperature to 300°C at a heating rate of 10°C / min, keep it warm fo...

Embodiment 3

[0032] A method for activating graphite felt electrodes etched by nickel salts. Using graphite felt as a base material, the surface of graphite felt is etched by coating a nickel salt solution and sintering in stages, and a large amount of oxygen functional groups and catalyst nickel are introduced to obtain nickel salt etched electrodes. Active graphite felt electrodes for corrosion flow batteries, the specific operation steps are as follows:

[0033] 1) In terms of mass percentage, weigh 15% analytically pure nickel salt crystals of graphite felt mass, add an appropriate amount of water, and magnetically stir for 20 minutes until completely dissolved to obtain a nickel salt solution;

[0034] 2) uniformly coating the prepared nickel salt solution on the clean graphite felt surface;

[0035] 3) Place the graphite felt coated with the nickel salt solution in a high-temperature furnace, raise the temperature to 300°C at a heating rate of 10°C / min, keep it warm for 60 minutes, t...

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Abstract

The invention relates to a method for activating graphite felt electrodes etched by nickel salts. Using graphite felt as a base material, the surface of the graphite felt is etched by coating nickel salt and sintering at elevated temperatures in stages, and a large amount of oxygen functional groups and catalyst nickel are introduced to obtain Active graphite felt electrodes for flow batteries etched by nickel salts. The advantages are: the invention is simple and quick to operate, low in price, and has relatively low requirements on the preparation environment, thereby reducing the preparation cost of the liquid flow battery. The active graphite felt prepared by the method of the invention is used as the electrode of the iron-chromium flow battery, the efficiency of the battery is improved, and the capacity loss is reduced, so that the electrochemical performance and stability of the iron-chromium flow battery are improved.

Description

technical field [0001] The invention belongs to the field of redox flow batteries, in particular to an activation method for nickel salt etching graphite felt electrodes. Background technique [0002] Environmental pollution and energy shortages have gradually become a major obstacle to the sustainable development of my country's economy and society. Strengthening the development and utilization of renewable energy such as solar energy, wind energy, and nuclear energy, as well as energy conservation and consumption reduction are important ways to solve these two problems. Wind energy , Solar energy and other renewable energy technologies have made breakthroughs and achieved large-scale applications. Redox flow batteries are the best supporting energy storage systems for these renewable energy power generation systems. The redox flow battery has fast starting speed, large energy storage capacity, complete charge and discharge, and is environmentally friendly and pollution-fre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/96H01M8/18
CPCH01M4/8882H01M4/96H01M8/188Y02E60/50
Inventor 张欢陈娜罗旭东
Owner UNIV OF SCI & TECH LIAONING
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