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Hierarchically-structured Co 3 O 4 nanowire arrays grown on carbon nanotube fibers as novel cathodes for high-performance wearable fiber-shaped asymmetric supercapacitors
Sun J.5; Man P.5; Zhang Q.5; He B.5; Zhou Z.5; Li C.5; Wang X.5; Guo J.5; Zhao J.5; Xie L.5; Li Q.5; Sun J.4; Hong G.3; Yao Y.5
2018-07-31
Source PublicationApplied Surface Science
ISSN01694332
Volume447Pages:795-801
AbstractFiber-shaped supercapacitors (FSCs) are lightweight and flexible energy storage devices that have potential applications in portable and wearable electronics. However, FSCs have flawed energy density stemming from a small specific capacitance and low operating voltage, which limits their practical application. This study puts forth a simple and effective approach to grow well-aligned three-dimensional cobalt oxide nanowire arrays (Co O NWAs) directly on carbon nanotube fibers (CNTFs). The hybrid fibers obtained an ultrahigh specific capacitance of 734.25 F cm (2210 mF cm ) in a three-electrode system. Benefiting from their intriguing features, we successfully fabricated an all-solid-state fiber-shaped asymmetric supercapacitor (FASC) prototype with a stable potential window of 1.6 V. Where the vanadium nitride nanowires/carbon nanotube fibers (VN NWAs/CNTFs) acted as negative electrode and the KOH poly(vinyl alcohol) (PVA) worked as the gel electrolyte. The electrochemical results suggested that the device possessed a high energy density of 13.2 mWh cm at a current density of 1.0 A cm . Besides, the FASC exhibited excellent mechanical flexibility and structural stability. Therefore, this device has great potential for next-generation wearable energy-storage devices.
KeywordCarbon nanotube fibers Co 3 O 4 Fiber-shaped asymmetric supercapacitor Specific capacitance
DOI10.1016/j.apsusc.2018.03.244
URLView the original
Language英語
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Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.ShanghaiTech University
2.University of Chinese Academy of Sciences
3.Universidade de Macau
4.Shanghai Institute of Ceramics Chinese Academy of Sciences
5.Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Sun J.,Man P.,Zhang Q.,et al. Hierarchically-structured Co 3 O 4 nanowire arrays grown on carbon nanotube fibers as novel cathodes for high-performance wearable fiber-shaped asymmetric supercapacitors[J]. Applied Surface Science,2018,447:795-801.
APA Sun J..,Man P..,Zhang Q..,He B..,Zhou Z..,...&Yao Y..(2018).Hierarchically-structured Co 3 O 4 nanowire arrays grown on carbon nanotube fibers as novel cathodes for high-performance wearable fiber-shaped asymmetric supercapacitors.Applied Surface Science,447,795-801.
MLA Sun J.,et al."Hierarchically-structured Co 3 O 4 nanowire arrays grown on carbon nanotube fibers as novel cathodes for high-performance wearable fiber-shaped asymmetric supercapacitors".Applied Surface Science 447(2018):795-801.
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