Pseudocapacitive charge storage in single-step-synthesized CoO-MnO2-MnCo2O4 hybrid nanowires in aqueous alkaline electrolytes
A new pseudocapacitive combination, viz. CoO-MnO2-MnCo2O4 hybrid nanowires (HNWs), is synthesized using a facile single-step hydrothermal process, and its properties are benchmarked with conventional battery-type flower-shaped MnCo2O4 obtained by similar processing. The HNWs showed high electrical c...
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2017
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my.utp.eprints.198672018-04-22T13:11:53Z Pseudocapacitive charge storage in single-step-synthesized CoO-MnO2-MnCo2O4 hybrid nanowires in aqueous alkaline electrolytes Harilal, M. Krishnan, S.G. Yar, A. Misnon, I.I. Reddy, M.V. Yusoff, M.M. Dennis, J.O. Jose, R. A new pseudocapacitive combination, viz. CoO-MnO2-MnCo2O4 hybrid nanowires (HNWs), is synthesized using a facile single-step hydrothermal process, and its properties are benchmarked with conventional battery-type flower-shaped MnCo2O4 obtained by similar processing. The HNWs showed high electrical conductivity and specific capacitance (Cs) (1650 F g-1 or 184 mA h g-1 at 1 A g-1) with high capacity retention, whereas MnCo2O4 nanoflower electrode showed only one-third conductivity and one-half of its capacitance (872 F g-1 or 96 mA h g-1 at 1 A g-1) when used as a supercapacitor electrode in 6 M KOH electrolyte. The structure-property relationship of the materials is deeply investigated and reported herein. Using the HNWs as a pseudocapacitive electrode and commercial activated carbon as a supercapacitive electrode we achieved battery-like specific energy (Es) and supercapacitor-like specific power (Ps) in aqueous alkaline asymmetric supercapacitors (ASCs). The HNWs ASCs have shown high Es (90 Wh kg- ) (volumetric energy density Ev 0.52 Wh cm- ) with Ps up to ~104 W kg-1 (volumetric power density Pv 5 W cm-3) in 6 M KOH electrolyte, allowing the device to store an order of magnitude more energy than conventional supercapacitors. © 2017 American Chemical Society. American Chemical Society 2017 Article PeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85032893914&doi=10.1021%2facs.jpcc.7b06630&partnerID=40&md5=8673628f1dc7d96d92bee50f25aa0f59 Harilal, M. and Krishnan, S.G. and Yar, A. and Misnon, I.I. and Reddy, M.V. and Yusoff, M.M. and Dennis, J.O. and Jose, R. (2017) Pseudocapacitive charge storage in single-step-synthesized CoO-MnO2-MnCo2O4 hybrid nanowires in aqueous alkaline electrolytes. Journal of Physical Chemistry C, 121 (39). pp. 21171-21183. http://eprints.utp.edu.my/19867/ |
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A new pseudocapacitive combination, viz. CoO-MnO2-MnCo2O4 hybrid nanowires (HNWs), is synthesized using a facile single-step hydrothermal process, and its properties are benchmarked with conventional battery-type flower-shaped MnCo2O4 obtained by similar processing. The HNWs showed high electrical conductivity and specific capacitance (Cs) (1650 F g-1 or 184 mA h g-1 at 1 A g-1) with high capacity retention, whereas MnCo2O4 nanoflower electrode showed only one-third conductivity and one-half of its capacitance (872 F g-1 or 96 mA h g-1 at 1 A g-1) when used as a supercapacitor electrode in 6 M KOH electrolyte. The structure-property relationship of the materials is deeply investigated and reported herein. Using the HNWs as a pseudocapacitive electrode and commercial activated carbon as a supercapacitive electrode we achieved battery-like specific energy (Es) and supercapacitor-like specific power (Ps) in aqueous alkaline asymmetric supercapacitors (ASCs). The HNWs ASCs have shown high Es (90 Wh kg- ) (volumetric energy density Ev 0.52 Wh cm- ) with Ps up to ~104 W kg-1 (volumetric power density Pv 5 W cm-3) in 6 M KOH electrolyte, allowing the device to store an order of magnitude more energy than conventional supercapacitors. © 2017 American Chemical Society. |
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Article |
author |
Harilal, M. Krishnan, S.G. Yar, A. Misnon, I.I. Reddy, M.V. Yusoff, M.M. Dennis, J.O. Jose, R. |
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Harilal, M. Krishnan, S.G. Yar, A. Misnon, I.I. Reddy, M.V. Yusoff, M.M. Dennis, J.O. Jose, R. Pseudocapacitive charge storage in single-step-synthesized CoO-MnO2-MnCo2O4 hybrid nanowires in aqueous alkaline electrolytes |
author_facet |
Harilal, M. Krishnan, S.G. Yar, A. Misnon, I.I. Reddy, M.V. Yusoff, M.M. Dennis, J.O. Jose, R. |
author_sort |
Harilal, M. |
title |
Pseudocapacitive charge storage in single-step-synthesized CoO-MnO2-MnCo2O4 hybrid nanowires in aqueous alkaline electrolytes |
title_short |
Pseudocapacitive charge storage in single-step-synthesized CoO-MnO2-MnCo2O4 hybrid nanowires in aqueous alkaline electrolytes |
title_full |
Pseudocapacitive charge storage in single-step-synthesized CoO-MnO2-MnCo2O4 hybrid nanowires in aqueous alkaline electrolytes |
title_fullStr |
Pseudocapacitive charge storage in single-step-synthesized CoO-MnO2-MnCo2O4 hybrid nanowires in aqueous alkaline electrolytes |
title_full_unstemmed |
Pseudocapacitive charge storage in single-step-synthesized CoO-MnO2-MnCo2O4 hybrid nanowires in aqueous alkaline electrolytes |
title_sort |
pseudocapacitive charge storage in single-step-synthesized coo-mno2-mnco2o4 hybrid nanowires in aqueous alkaline electrolytes |
publisher |
American Chemical Society |
publishDate |
2017 |
url |
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85032893914&doi=10.1021%2facs.jpcc.7b06630&partnerID=40&md5=8673628f1dc7d96d92bee50f25aa0f59 http://eprints.utp.edu.my/19867/ |
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1738656130605776896 |
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13.18916 |