| Development of graphite felt for all vanadium redox flow battery |
| graphite felt |
Among all kinds of electrode materials of vanadium redox flow battery, graphite felt is the best comprehensive performance of electrode material, but it still needs to be activated to enhance its performance.
Wind, solar and other renewable energy power generation instability and discontinuity problem, need equipped with battery storage device, in order to achieve continuous and stable electrical energy output, avoid the local grid impact caused large-scale accidents. Large scale storage reservoir in all vanadium redox flow battery for energy device has been developed rapidly in recent years, as one of the most important parts of vanadium battery, electrode and its related characteristics, including cost and processing technology, have become the key aspects of the research and development of vanadium battery system.
Vanadium battery electrode materials are carbon, such as graphite, carbon cloth, carbon felt and so on. Choosing appropriate electrode materials can improve the electrochemical activity of the electrode, and ultimately improve the energy efficiency of vanadium battery.
From the point of reducing the cost of the electrode and reducing the quality of the battery, the results of the study of various carbon materials show that the effect of PAN based graphite felt is best. However, the performance of PAN based graphite felt can not meet the needs of vanadium battery, and it needs to be processed on the graphite felt surface to improve its performance.
Although the comprehensive performance of graphite felt is superior, the electrochemical activity of the electrode can not meet the requirement of vanadium battery, so it needs to be processed to improve its electrochemical performance.
In order to improve the electrochemical performance of graphite felt, in the graphite felt surface by ion exchange and ion etching or infiltration method for deposition of metals and metal oxides, usually choose transition metal or semiconductor compounds. |
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