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Ultra-Thin Hollow Carbon Nanospheres for Pseudocapacitive Sodium-Ion Storage

Cited 61 time in Web of Science Cited 62 time in Scopus
Issue Date
2015-03
Citation
ChemElectroChem, Vol.2 No.3, pp.359-365
Keywords
asymmetric supercapacitorshollow nanocarbonnanostructurespseudocapacitorssodium-ion electrodes
Abstract
Ultra-thin hollow carbon nanospheres (UTH-CNs) are fabricated for use as anodes of asymmetric sodium ion pseudocapacitors. The similar to 3 nm thick amorphous carbon walls obtained from regenerated silk proteins as a template exhibit a well-defined porous structure suitable for reversible sodium-ion storage. The UTH-CNs show remarkable electrochemical activity with sodium via a pseudocapacitive reaction, delivering a large reversible capacity as well as superior rate performance for more than 1000 cycles. The pseudocapacitors based on UTH-CNs exhibit a capacitance of 186 Fg(-1), a specific energy of 43 Wh kg(-1) and a power density of 10 kW kg(-1). This represents the highest value yet reported for asymmetric sodium-ion storage pseudocapacitors.
ISSN
2196-0216
URI
https://hdl.handle.net/10371/165070
DOI
https://doi.org/10.1002/celc.201402359
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Materials Science and Engineering (재료공학부)Journal Papers (저널논문_재료공학부)
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