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나노 구조 물리 연구단
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TLM-PSD model for optimization of energy and power density of vertically aligned carbon nanotube supercapacitor

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Title
TLM-PSD model for optimization of energy and power density of vertically aligned carbon nanotube supercapacitor
Author(s)
Arunabha Ghosh; Viet Thong Le; Jung Jun Bae; Lee, Young Hee
Publication Date
2013-10
Journal
SCIENTIFIC REPORTS, v.3, no., pp.2939 -
Publisher
NATURE PUBLISHING GROUP
Abstract
Electrochemical capacitors with fast charging-discharging rates are very promising for hybrid electric vehicle industries including portable electronics. Complicated pore structures have been implemented in active materials to increase energy storage capacity, which often leads to degrade dynamic response of ions. In order to understand this trade-off phenomenon, we report a theoretical model based on transmission line model which is further combined with pore size distribution function. The model successfully explained how pores length, and pore radius of active materials and electrolyte conductivity can affect capacitance and dynamic performance of different capacitors. The powerfulness of the model was confirmed by comparing with experimental results of a micro-supercapacitor consisted of vertically aligned multiwalled carbon nanotubes (v-MWCNTs), which revealed a linear current increase up to 600â€...Vs -1 scan rate demonstrating an ultrafast dynamic behavior, superior to randomly entangled singlewalled carbon nanotube device, which is clearly explained by the theoretical model.
URI
http://pr.ibs.re.kr/handle/8788114/1238
DOI
10.1038/srep02939
ISSN
2045-2322
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
Files in This Item:
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