Uniform growth of Zn-Mn-Co ternary oxide nanoneedles for high-performance energy-storage applications

This paper reports the facile synthesis of a novel electrode material for high-performance supercapacitor. The binder-free Zn-Mn-Co ternary oxide nanoneedles with highly exposed active sites to electrolyte were examined by multiple characterizations. Zn-Mn-Co ternary oxide nanoneedle electrode exhib...

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Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2019-03, Vol.837, p.39-47
Main Authors: Hussain, Iftikhar, Mohamed, Saad G., Ali, Awais, Abbas, Nadir, Ammar, Syed Muhammad, Al Zoubi, Wail
Format: Article
Language:English
Subjects:
Activated carbon
Binder-free
Cobalt
Current density
Electrode materials
Electrodes
Energy storage
Flux density
Hybrid supercapacitor device
Nanoneedles
Supercapacitors
Synergistic effect
Zinc
Zn-Mn-Co ternary oxide
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Summary:This paper reports the facile synthesis of a novel electrode material for high-performance supercapacitor. The binder-free Zn-Mn-Co ternary oxide nanoneedles with highly exposed active sites to electrolyte were examined by multiple characterizations. Zn-Mn-Co ternary oxide nanoneedle electrode exhibited a high specific capacity of 849Cg−1 at a current density of 1Ag−1 in three electrode measurements. Furthermore, it showed an excellent cycling stability after 8000cycles and a very high coulombic efficiency. Moreover, hybrid supercapacitor device was assembled using Zn-Mn-Co ternary oxide nanoneedles as a positive electrode and activated carbon as a negative electrode. The hybrid supercapacitor device showed a high specific capacity of 158Cg−1 at a current density of 1Ag−1. The device delivered a high energy density of 35.5Whkg−1 and a high power density of 7.5kWkg−1. Interestingly, the hybrid supercapacitor device showed 100% initial capacitance retention over 7000cycles. All these attractive results demonstrate the importance of this electrode material towards practical application. [Display omitted] •This paper reports the growth of novel electrode material Zn-Mn-Co oxide on Ni foam.•Zn-Mn-Co oxide showed higher capacity and rate capability than ZnCo2O4 and Co3O4.•The hybrid supercapacitor device delivered an energy density of 35.5Whkg−1.•The HSC device exhibited a high power density of 7.5kWkg−1.•The HSC device showed exceptional stability (100%) after 7000cycles.
ISSN:1572-6657
1873-2569
DOI:10.1016/j.jelechem.2019.01.052