High-performance supercapacitors based on vertically aligned carbon nanotubes and nonaqueous electrolytes
Identifieur interne : 000221 ( Main/Exploration ); précédent : 000220; suivant : 000222High-performance supercapacitors based on vertically aligned carbon nanotubes and nonaqueous electrolytes
Auteurs : Byungwoo Kim [Corée du Sud] ; Haegeun Chung [Corée du Sud] ; Woong Kim [Corée du Sud]Source :
- Nanotechnology [ 0957-4484 ] ; 2012-04-20.
Abstract
We demonstrate the high performance of supercapacitors fabricated with vertically aligned carbon nanotubes and nonaqueous electrolytes such as ionic liquids and conventional organic electrolytes. Specific capacitance, maximum power and energy density of the supercapacitor measured in ionic liquid were 75Fg1, 987kWkg1 and 27Whkg1, respectively. The high power performance was consistently indicated by a fast relaxation time constant of 0.2s. In addition, electrochemical oxidation of the carbon nanotubes improved the specific capacitance (158Fg1) and energy density (53Whkg1). Both high power and energy density could be attributed to the fast ion transport realized by the alignment of carbon nanotubes and the wide operational voltage defined by the ionic liquid. The demonstrated carbon-nanotube-and nonaqueous-electrolyte-based supercapacitors show great potential for the development of high-performance energy storage devices.
Url:
DOI: 10.1088/0957-4484/23/15/155401
Affiliations:
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Specific capacitance, maximum power and energy density of the supercapacitor measured in ionic liquid were 75Fg1, 987kWkg1 and 27Whkg1, respectively. The high power performance was consistently indicated by a fast relaxation time constant of 0.2s. In addition, electrochemical oxidation of the carbon nanotubes improved the specific capacitance (158Fg1) and energy density (53Whkg1). Both high power and energy density could be attributed to the fast ion transport realized by the alignment of carbon nanotubes and the wide operational voltage defined by the ionic liquid. The demonstrated carbon-nanotube-and nonaqueous-electrolyte-based supercapacitors show great potential for the development of high-performance energy storage devices.</div></front></TEI><affiliations><list><country><li>Corée du Sud</li></country><region><li>Région capitale de Séoul</li></region><settlement><li>Séoul</li></settlement></list><tree><country name="Corée du Sud"><region name="Région capitale de Séoul"><name sortKey="Kim, Byungwoo" sort="Kim, Byungwoo" uniqKey="Kim B" first="Byungwoo" last="Kim">Byungwoo Kim</name></region><name sortKey="Chung, Haegeun" sort="Chung, Haegeun" uniqKey="Chung H" first="Haegeun" last="Chung">Haegeun Chung</name><name sortKey="Kim, Woong" sort="Kim, Woong" uniqKey="Kim W" first="Woong" last="Kim">Woong Kim</name><name sortKey="Kim, Woong" sort="Kim, Woong" uniqKey="Kim W" first="Woong" last="Kim">Woong Kim</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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