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Incorporating Mn 2+ /Ni 2+ /Cu 2+ /Zn 2+ in the Co 3 O 4 Nanorod: To Investigate the Effect of Structural Modification in the Co 3 O 4 Nanorod and Its Electrochemical Performance
Author(s) -
Mary A Juliet Christina,
Bose A. Chandra
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803135
Subject(s) - nanorod , electrolyte , electrochemistry , supercapacitor , materials science , current density , electrode , cobaltite , nuclear chemistry , inorganic chemistry , analytical chemistry (journal) , chemical engineering , nanotechnology , chemistry , metallurgy , physics , quantum mechanics , chromatography , engineering
The major key component for developing a high‐efficiency supercapacitor device is electrode and electrolyte material. This research paper demonstrates the structural modification of Co 3 O 4 nanorod and the electrochemical behavior of Co 3 O 4 nanorod in different aqueous electrolytes such as KOH, PVA/KOH, NaOH, KCl, and Na 2 SO 4 . The pseudocapacitive behavior of Co 3 O 4 is varying in the order of KOH > NaOH > PVA/KOH > Na 2 SO 4 > KCl. The storage capability of MCo 2 O 4 (where M=Mn, Ni, Cu, and Zn) nanorods has been compared with Co 3 O 4 nanorod in the KOH electrolyte environment. The material in the form of nanorods is beneficial for an efficient pathway to penetrate an OH − ion into the electroactive material. Among other cobaltite (MCo 2 O 4 ), NiCo 2 O 4 nanorod exhibits the outstanding capacitance value of 2041.7 F g −1 at a current density of 1 A g −1 . NiCo 2 O 4 || NiCo 2 O 4 symmetric supercapacitor system delivers the maximum energy density of 25.42 W h kg −1 at a current density of 0.5 A g −1 .
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