Battery energy storage capacity is essential for the use of clean energy such as wind energy and solar energy. Researchers at Harvard University in the United States have newly discovered an organic molecule that is expected to be used in long-term, high-quality flow batteries, which is safer and cheaper than the batteries currently used.
The flow battery is an electrochemical energy storage device, which is safer and more economical than traditional lithium batteries in storing large-scale clean energy. At present, a vanadium flow battery using a vanadium salt solution for the positive and negative electrodes is common, but the cost and maintenance cost of this battery are relatively high.
Research published in the American "Joule" magazine on the 23rd showed that a molecule called "masalaquinone" can be charged and discharged tens of thousands of times over a period of several years. "Mashara" is taken from the longevity patriarch in the "Bible Old Testament", and quinone is a key molecule in natural processes such as photosynthesis and cellular respiration.
Researchers from Harvard University in materials science and chemistry cooperated to analyze the aging process of quinones in liquid batteries. On this basis, the quinone molecules were modified and modified to develop a "massara" that improved the life of the flow battery. Quinone "molecule.
Studies have shown that under laboratory conditions, the aging rate of "masalaquinone" molecules is less than 0.01% per day, the aging rate caused by each charge and discharge is less than 0.0001%, and the overall annual aging rate is expected to be less than 3% It is expected to be able to charge and discharge tens of thousands of times effectively. In addition, the "masalaquinone" molecule is highly soluble and can store more energy in a smaller space. Because the "masalaquinone" molecule plays a role in a weakly alkaline electrolyte, a cheaper sealing material and a polymer membrane can be used to separate the positive and negative electrodes, further reducing costs.
Corresponding author of the paper, Hartz University professor of materials and energy technology Michael Aziz said that the flow battery prepared by using this newly discovered molecule has longer-term stability and has commercial capabilities. David Carby, a co-first author of the paper and a postdoctoral researcher at Harvard University, said that this organic molecule is expected to replace expensive vanadium flow batteries. (Reporter Zhou Zhou)
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