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제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Understanding the Electrochemical Reaction in the Polybromide Battery System

2019년 2월 14일 15시 57분 34초
PHYS.P-206 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (금요일) 11:00~12:30
Physical Chemistry
저자 및
Joo-Hee Lim, Cheol-Woo Yi*
Department of Chemistry, Sungshin University, Korea
Polyhalide species have been used in wide range of applications such as halogenation reactions, nanomaterial modification, and so on. Even though most of studies for polyhalide have been performed based on iodine, polyhalide species consisting of bromine have recently had an attraction due to their lower atomic mass in comparison with iodine. It indicates that polybromide species have higher energy density than polyiodide species when they are playing a role as an energy material. Hence, polybromide species have been received a great attention as an electrochemical energy storage (EES) material. In this study, we have been trying to prepare a novel type of battery system, polybromide battery (PBB), using polybromide species as an energy generation/storage material. Based on the initial discharging potential of PBB and the equilibrium reaction of bromine species in the aqueous media, we suggests that the reduction of bromine species in the polybromide is not a primary reaction on the electrode but an indirect reaction. After discharging tests for various polybromide species, we obtained Raman spectra of polybromide remained in the PBB system in order to investigate the variation in the main species of polybromide. The resulting Raman spectra were found that bromine weakly bound to the complexing agent in polybromide species is initially reacted on the carbon electrode in discharging reaction and the bromine strongly bound was not participated on the discharging reaction. Our results aid to understanding the mechanism of charging/discharging reactions of the PBB system.