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release time:2024-07-02 Hits: Popular:AG11 battery
Organic liquid flow 26650 battery is launched - a breakthrough in energy storage technology research
Recently, the research results of "high energy density all-liquid organic electrochemical active material liquid flow 26650 battery" completed by Beijing Low Carbon Clean Energy Research Institute and Tsinghua University Chemical Engineering Department were published in the latest issue of "ACS Applied Energy Materials" sponsored by the American Chemical Society, and were featured on the cover of the magazine, attracting widespread attention from the society. It is reported that large-scale energy storage (or grid energy storage) technology is a key technology to increase the grid connection rate and popularize the application of renewable energy, and is also a key enabling technology for the development of energy Internet, distributed power generation, power auxiliary frequency modulation, off-grid power supply, safe backup power supply and other fields. The research results of "High Energy Density All-Liquid Organic Electrochemical Active Material Flow 26650 battery" completed by Beijing Low Carbon Clean Energy Research Institute and Department of Chemical Engineering of Tsinghua University for the first time proposed an organic flow 26650 battery based on all-liquid active material, which has high theoretical energy density, high theoretical power density and good reaction activity. It is one of the most promising large-scale energy storage technologies. Compared with traditional flow batteries, it has the advantages of good safety, independent design of power and capacity, long energy storage time, large output power, large energy storage capacity and easy expansion. Photos and test results of high power density flow 26650 battery stack developed by Low Carbon Institute. The power density of a typical kilowatt-class flow 26650 battery exceeds 500mWcm-2, which is 2-3 times higher than that of traditional flow batteries of the same level, realizing the miniaturization of the stack and the efficiency of materials, and has obvious low-cost advantages. At the same time, the positive and negative electrodes of the flow 26650 battery are respectively made of 2,5-di-tert-butyl-1-methoxy-4-(2-methoxyethoxy)benzene and 2-methylbenzophenone, which are rich in raw material sources. The open circuit voltage of the 26650 battery reaches 2.97V, which is 1-1.5 times higher than that of traditional liquid flow batteries, and the theoretical energy density reaches 223Wh/L, which is more than 4 times the theoretical energy density of traditional liquid flow batteries (50Wh/L). Experiments show that the active materials at both poles of the active liquid flow 26650 battery have excellent electrochemical properties and good cycle stability, with a current efficiency of 95% and an energy efficiency of 70%. This study has initially explored the direction of successfully improving the energy density of liquid flow batteries from a completely new perspective, which has important inspirational significance for the research and development of a new generation of liquid flow 26650 battery technology.
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