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Electrode material treating method for electrochemical flow cell

A technology of electrode material and liquid flow battery, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of reducing the stability and service life of electrode materials, the oxidation reaction process is not easy to control, and the oxidation reaction of fiber surface is violent, etc., to achieve treatment The effect of short time, easy large-scale production, and low cost

Active Publication Date: 2014-05-28
DALIAN RONGKE POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of acid activation treatment is good, but a large amount of waste acid needs to be produced during the treatment process, causing environmental pollution
The heat treatment operation process requires high requirements, and the oxidation reaction process is not easy to control, and excessive oxidation will reduce the stability and service life of the electrode material
The equipment cost of the electrochemical treatment method is high, and the use of sulfuric acid as the electrolyte will lead to a more severe oxidation reaction on the fiber surface, serious etching on the fiber surface, and reduce the service life of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Place the graphite felt on the platform of the plasma generating device, adopt low-temperature plasma technology, and adjust the parameters of the plasma generator as follows: the gas source uses 99.99% oxygen, the flow rate is 0.5m3 / h, the distance between the nozzle and the surface of the graphite felt is 5mm, The moving speed of the nozzle is 20mm / s, and the exposure time of the electrode material is not less than 5s. Apply treated graphite felt to assemble 1kW all-vanadium redox flow cell, at 80mA / cm 2 Operate under the same conditions, evaluate the energy conversion efficiency of the battery (energy efficiency: the battery is charged and discharged at the rated power, the energy released by the battery is divided by the energy charged), and compared with the performance of the graphite felt battery without surface treatment, as shown in the table below Show:

[0028] sample

[0029] It can be seen from the above table that the energy efficiency of the ba...

Embodiment 2

[0031] Place the carbon felt on the platform of the plasma generator, adopt low-temperature plasma technology, adjust the parameters of the plasma generator as follows: the gas source uses 99.9% oxygen, the flow rate is 2.5m3 / h, the distance between the nozzle and the surface of the graphite felt is 8mm, The moving speed of the nozzle is 50mm / s, and the exposure time of the electrode material is not less than 5s. Apply treated graphite felt to assemble 1kW all-vanadium redox flow cell, at 80mA / cm 2 Operate under the same conditions, evaluate the energy conversion efficiency of the battery (energy efficiency: the battery is charged and discharged at the rated power, the energy released by the battery is divided by the energy charged), and compared with the performance of the carbon felt battery without surface treatment, as shown in the table below Show:

[0032] sample

[0033] It can be seen from the above table that the energy efficiency of the battery before trea...

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PUM

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Abstract

The invention discloses an electrode material treating method for an electrochemical flow cell. In the method, low temperature and normal pressure plasma technology is adopted for conducting surface treatment on electrode materials, gas flow is adopted to adjust the intensity of the plasma, and the surface treatment effect is adjusted through adjusting the relative motion speeds and the distance between the electrode materials and the nozzle of a low temperature plasma electric discharging device. The method provided by the invention has the benefits that etching in electrode materials treatment is conducted under room temperature, and damage on the electrode materials caused by high temperature is avoided; the surface treatment effect can be effectively controlled solely by adjusting the distance between the gas flow and the nozzle through the adoption of the plasma technology; continuous treatment on materials is realized without arranging a vacuum environment or an airtight cavity; no inorganic or organic solvent is required during a treating process, and as only electric energy and oxygen are consumed, the method is low in energy consumption, safe and environmental-friendly; the material surface is treated uniformly, the treatment time is short, the electrode material treating method is extremely easy to be used for mass production, and is simple in technology and low in cost.

Description

technical field [0001] The invention relates to the technical field of liquid flow batteries, in particular to a method for processing electrode materials for a liquid flow battery. Background technique [0002] Electric energy is an indispensable secondary energy for human life and production in modern society. With the development of social economy and the improvement of people's living standards, the demand for electricity is increasing day by day. For the sustainable development of the whole society, the full development and utilization of renewable energy has become a very urgent need. In order to ensure the stable power supply of the renewable energy power generation system and make full and effective use of its power generation capacity, it must be regulated by means of electric storage and energy storage. In addition, the peak-shaving and valley-filling and load balancing of the power grid also urgently require us to develop large-scale energy storage technologies....

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/96
CPCH01M4/8878H01M4/96Y02E60/50
Inventor 刘宗浩张华民高新亮王晓丽林则青李颖
Owner DALIAN RONGKE POWER