High-performance supercapacitor electrode materials from cellulose-derived carbon nanofibers
Data(s) |
18/07/2015
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Resumo |
Nitrogen-functionalized carbon nanofibers (N-CNFs) were prepared by carbonizing polypyrrole (PPy)-coated cellulose NFs, which were obtained by electrospinning, deacetylation of electrospun cellulose acetate NFs, and PPy polymerization. Supercapacitor electrodes prepared from N-CNFs and a mixture of N-CNFs and Ni(OH)2 showed specific capacitances of ∼236 and ∼1045 F g(-1), respectively. An asymmetric supercapacitor was further fabricated using N-CNFs/Ni(OH)2 and N-CNFs as positive and negative electrodes. The supercapacitor device had a working voltage of 1.6 V in aqueous KOH solution (6.0 M) with an energy density as high as ∼51 (W h) kg(-1) and a maximum power density of ∼117 kW kg(-1). The device had excellent cycle lifetime, which retained ∼84% specific capacitance after 5000 cycles of cyclic voltammetry scans. N-CNFs derived from electrospun cellulose may be useful as an electrode material for development of high-performance supercapacitors and other energy storage devices. |
Identificador | |
Idioma(s) |
eng |
Publicador |
ACS Publications |
Relação |
http://dro.deakin.edu.au/eserv/DU:30074828/niu-highperformance-2015.pdf http://www.dx.doi.org/10.1021/acsami.5b03757 http://www.ncbi.nlm.nih.gov/pubmed/26087346 |
Direitos |
2015, ACS Publications |
Palavras-Chave | #cellulose #electrospinning #nanofibers #nitrogen-functionalized carbon nanofiber #supercapacitor |
Tipo |
Journal Article |