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제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Fe2O3 Nanoparticles Coated by N-doped Graphitic Carbon Using Dopamine as an Anode Material for Sodium-Ion Batteries

2019년 8월 22일 13시 40분 27초
ELEC.P-416 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 17일 (목요일) 11:00~12:30
저자 및
Jungwook Song, Jongsik Kim*
Department of Chemistry, Dong-A University, Korea
The increasing studies about the renewable energy technologies have been urged the development of the new power supplying systems to surpass lithium-ion batteries (LIBs) due to the limited nature abundance and regionally unbalanced reserves of lithium. Recently, sodium-ion batteries (SIBs) have been considered as one of the attractive next generation energy storage devices due to sufficient resources, low price, and similar electrochemical properties of sodium to those of lithium. However, because of the larger size and heavier atomic weight of sodium than lithium, graphite, the most common anode in LIBs, is difficult to be used in SIBs. Therefore, it is necessary to explore suitable high-performance anode materials for SIBs. Iron oxide (Fe2O3) has the merits as an anode material in SIBs due to the high theoretical capacity (about 1007.0 mA h g-1), low cost, and non-toxicity. However, it suffered from severe volume changes during charge-discharge processes, mainly caused by the pulverization and agglomeration of Fe2O3 particles in the conversion reactions with sodium ions. Thus, low reversible capacity and cycle stability are frequently observed. To alleviate these problems, we synthesized Fe2O3 coated by N-doped graphitic carbon (Fe2O3/NGC) using dopamine as carbon and nitrogen sources. The Fe2O3/NGC composite shows enhanced electrochemical performances with an excellent reversible capacity of about 497.66 mA h g-1 at 100.7 mA g-1 after 150 cycles in the voltage range of 0.01-3.0 V, which value is significantly higher than those of the bare Fe2O3 sample.