Recently, Zhang Huamin, a researcher in the Department of Energy Storage Technology of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and a research team led by Li Xianfeng have made new progress in the research of electrode materials for zinc bromide flow batteries. Zinc-bromide flow battery has the advantages of high theoretical energy density and low electrolyte cost, and has a good application prospect in the field of large-scale energy storage. However, its lower Br/Br-reactive activity leads to a lower operating current density (~20mA/cm2), which results in a low power density and high material cost, which seriously restricts its development. In order to increase the reaction rate of the Br/Br-electron stack and further increase the power density of the zinc-bromine flow battery, the research team developed a highly ordered mesoporous carbon cathode material through structural design and applied it to the zinc-bromine flow battery. . The electrode material provides more active sites for the reaction of Br2/Br-, which increases the reaction kinetics rate; at the same time, the highly ordered pore structure can effectively reduce the bromine diffusion resistance. With its assembled single cell operating at a current density of 80 mA/cm2, the energy efficiency exceeds 80%, breaking the bottleneck of low power density constraints, and laying a good foundation for the development of high power density, low cost zinc-bromine flow batteries. basis. The relevant research results were published online at Nano Energy, 2016, 21, 217-227. The above research work has been funded by the National Natural Science Foundation of China, the Collaborative Innovation Center for Energy Materials Chemistry of the Ministry of Education, the Dalian Chemical Industry Institute-Israeli Chemical Group Cooperation Project and other related projects.
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