Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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A Novel Hybrid Supercapacitor Using a Graphite Cathode and a Niobium(V) Oxide Anode

  • Park, Gum-Jae (Department of Applied Chemistry, Saga University) ;
  • Kalpana, D. (Faculty of Applied Chemical Engineering, Chonnam National University) ;
  • Thapa, Arjun Kumar (Department of Applied Chemistry, Saga University) ;
  • Nakamura, Hiroyoshi (Department of Applied Chemistry, Saga University) ;
  • Lee, Yun-Sung (Faculty of Applied Chemical Engineering, Chonnam National University) ;
  • Yoshio, Masaki (Department of Applied Chemistry, Saga University)
  • Published : 2009.04.20
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Abstract

To meet the high current load requirement from the high energy density realized by metal oxide and high power density graphite, we propose a novel hybrid supercapacitor consisting of Nb2O5 and KS6 graphite in 1.0 M LiPF6-EC:DEC (1:2). This new system exhibits a sloping voltage profile from 2.7 to 3.5 V during charging and presents a high operating voltage plateau between 1.5 and 3.5 V during discharging. The cell was tested at a current density of 100 mA/g with a cut-off voltage between 3.0 and 1.0 V. This novel energy storage system delivers the highest initial discharge capacity of 55 mAh/g and exhibits a good cycle performance.

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References

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