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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 4
BKCSDE 30(4)
April 20, 2009 

A Novel Hybrid Supercapacitor Using a Graphite Cathode and a Niobium(V) Oxide Anode
Gum Jae Park, D Kalpana, Arjun Kumar Thapa, Hiroyoshi Nakamura, Yun Sung Lee*, Masaki Yoshio*
Novel energy storage system, Graphite, Niobium(V) oxide, Intercalation/de-intercalation
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.
817 - 820
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