In order to provide users with clean energy such as solar energy and wind power, when sunlight or wind power is insufficient, a reliable backup energy storage system is needed to provide electricity.
The solution to this problem may be to use excess solar energy and wind energy to store energy. Now we are developing a compound that can provide significant storage capacity. This compound can provide excess energy in the absence of sunlight and wind. Store it for use. In converting energy stored energy into electrical energy, the oppositely charged chemical solution can be pumped into the solid electrode to generate electron exchange to provide electricity.
The key to this technology, called a redox flow battery, is to look for chemicals that not only “carry†enough charge, but also store it for long periods without degrading, thereby maximizing energy storage and power generation, and maximizing Reduce the cost of charging the system.
Researchers at the University of Rochester in the United States collaborated with researchers at the State University of New York at Buffalo and announced that they have developed a compound that is likely to change the pattern of energy storage.
Ellen Matson, an assistant professor of chemistry at the laboratory's research staff, described a metal oxide cluster developed in a paper published in the chemical top journal Chemicals Science. It has very good electrochemical properties and its energy storage capacity is almost twice that of current electrochemical cell materials for redox flow batteries.
The main author of the report, Lauren Van Gelder, a third-year Ph.D. student in the Matterson Laboratory, said: "In the literature, the energy storage of polyoxometalates is very rare. In our research and development Before the results were introduced, there may be one or two examples, and there is no real potential for these results."
"This is actually an untapped area of ​​molecular development," Matson added.
Flow batteries for wind and solar energy
This metal oxide cluster was first developed in the laboratory of the German chemist Johann Spandl and studied its magnetic properties. Van Golder's tests showed that this compound can store charge in a redox flow battery, but it is not as stable as one might expect.
However, Matson described "simple molecular modification" by replacing ethanol-derived methanol salt clusters of compounds with ethanol-based oxides. The research team was able to expand the cluster's stable potential window, which could be stored more in the cell. Electric energy.
Mattson said: "This work is really cool. We can produce ethoxide and methoxide clusters by using methanol and ethanol. These two kinds of reagents are inexpensive, easy to obtain, and safe to use. The rest of the metal components Oxygen atoms and oxygen atoms are abundant elements of the earth. This system can be synthesized directly and efficiently, and is a new direction for the development of charge carriers. We believe that this will set a new standard in the field of energy storage."
The electrochemical tests performed in this study employed Matson equipment and techniques used in the laboratory. Therefore, Timothy Cook, an assistant professor of chemistry at Buffalo University, and Anjula Kosswattaarachchi, a fourth-year graduate student at Cooke University, also participated in the study. Van Golde conducts training on test equipment in Cook's lab and helps Kosvattarac to synthesize compounds.
The two research teams applied for funding from the National Science Foundation as part of an ongoing collaborative project to further refine clusters used in commercial redox flow batteries.
Mattson emphasized the “critical role†Vangold played in conducting preliminary tests and experiments on the cluster. “As a third-year graduate student, she has done an incredible job and played an important role in promoting research in the laboratory,†Mattson said.
Last year, Mattson received a university biotechnology fund that enabled the lab to purchase the electrochemical devices needed for the study. Patrick Forrestal of the Mattson Laboratory also participated in the study.
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