119th General Meeting of the KCS

Type Poster Presentation
Area 재료화학
Room No. 포스터발표장
Time 4월 21일 (금요일) 13:00~14:30
Code MAT.P-371
Subject Li3VO4/Carbon Composite with Enhanced Electrochemical Performances as an Anode Material for Lithium–Ion Batteries
Authors 제우진, 박한솔, 김종식*
동아대학교 화학과, Korea
Abstract In recent years, lithium-ion batteries (LIBs) have been attractive as energy storage devices because of the development of eco-friendly energy, electric transportation, and electronic devices. LIBs have many advantages such as high power density, low environmental impact, and long cycle life. Despite these advantages, graphite, which is commercially used as an anode material in LIBs, has drawbacks of its low theoretical capacity (374 mAh g-1) and poor stability in charge/discharge processes. Recently, lithium vanadium oxide (Li3VO4) has become attractive as an alternative anode material for the LIBs because Li3VO4 has a high theoretical capacity (394 mAh g-1 at 0.0-3.0 V), fast ionic conductivity, and the lower working voltage range than those of the other metal oxide anode materials. However, Li3VO4 suffers from poor electronic conductivity, large band gap, and low Coulombic efficiency, which cause poor the undesirable reversible capacity and rate performance. In this study, we synthesized Li3VO4/VGCF composites by using highly conductive vapor grown carbon fiber (VGCF) to overcome the drawbacks of Li3VO4. Li3VO4/VGCF composites exhibited enhanced electrochemical performance with the reversible capacity of about 310 mAh g-1 after 100 cycle at a rate of 0.5 C in the voltage range of 0.0-3.0 V compared to bare Li3VO4(about 180 mAh g-1).
E-mail dkrnahs003@gmail.com