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제125회 대한화학회 학술발표회 및 총회 Enhance Cycling Performance of FeF2 Nanoparticles@N-Doped Graphitic Carbon as a Sodium-Ion Cathode Material

2020년 2월 5일 18시 24분 50초
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저자 및
Achmad Yanuar Maulana, Da Won Lee1, Jongsik Kim*
Department of Chemistry, Dong-A University, Korea
1Chemistry, Dong-A University, Korea
Over the last two years, the growth of electric vehicles (EV) is achieving at tipping point, which stimulates the development of new generation of energy storage. Lithium-ion batteries (LIBs) as commercial energy storage in EV suffering some issues such as low availability and high cost of lithium, resulting in difficulty to apply it into large-scale energy storage systems (ESS). Sodium-ion batteries (SIBs) have attracted substantial attention to become the next generation of energy storage due to high availability and economic benefits of sodium. Iron difluoride (FeF2) represents good prospect as one of conversion-typed cathode materials in SIBs because of low-cost materials and high theoretical capacity (about 571 mAh g-1). In addition, it is less affected by the large size of sodium ion compared to insertion-typed cathodes. However, FeF2 exhibits low rate capability and cycling stability due to its poor electrical conductivity. In this work, we successfully synthesized FeF2 nanoparticles wrapped by nitrogen-doped graphitic carbon (FeF2@NGC) using dopamine as single source of carbon and nitrogen sources. The FeF2@NGC shows the enhanced initial discharge capacity of about 461.4 mAh g-1 at a current density of 50 mA g-1 with an excellent cyclability compared to bulk FeF2.