ANM
2010
3rd
International Conference on Advanced Nano Materials
12-15 September 2010 - Agadir, Morocco
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Abstract
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ANMM220 |
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NANOMATERIALS FOR SUPERCAPACITOR ELECTRODES |
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Jae Kook Yun, D.-Y Park, Jeong Ho Park, Yong Joo Kim, Jang Myoun Ko |
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Department of Applied Chemistry & Biotechnology
and Applied Materials Engineering, Hanbat National University, Daejeon
305-719, South Korea |
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A
supercapcitor is a significant energy storage device that has attracted
much attention due to its high-power capability and long cycle life,
compared to conventional batteries. Supercapacitors have been employed
in many applications such as memory back-up in electronic devices and
hybrid electric vehicles that use a fuel cell or battery.
Supercapacitors may be classified into carbon-based electric double
layer capacitors and electrically conducting polymer- and metal
oxide-based pseudocapacitors. In a pseudocapacitor, the charge can be
concurrently stored on the electrode surface through a double layer and
in the bulk of active material via a faradic reaction. Various metal
oxides, including RuO2, MnO2] and NiOx, have been studied to evaluate
the charge storage behaviors in supercapacitor electrodes. Among the
metal oxides, MnO2 appeared to be one of the most attractive electrode
materials for supercapacitors, due to its low cost, availability,
environmental friendliness, and higher capacitance. However, the
supercapacitive performance of a MnO2 electrode depends on the particle
size of the active material, electrode morphology, and its crystal
structure. In addition, the nanostructured active material for
the supercapacitor electrode is a critical issue in overcoming the
intrinsically low electronic conductivity and clustered morphology of
MnO2.
In the present work, different kinds of metal oxide electrode materials
including nanowire-structured MnO2 are prepared and their
supercapacitive properties are investigated by means of cyclic
voltammetry. Details will be presented.
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