e-Article
High Performance Electrode Material for Supercapacitors Based on α-Co(OH)2 Nano-Sheets Prepared Through Pulse Current Cathodic Electro-Deposition (PC-CED)
Document Type
Article
Source
(2018): 37-45.
Subject
Language
Korean
ISSN
17388090
Abstract
In this paper, the well-defined nano-sheets of α-Co(OH)2 were preparedthrough the cathodic electrosynthesis from an additive-free aqueous cobaltnitrate bath. The pulse current cathodic electro-deposition (PC-CED) was usedas the means for the controlling the OH− electrogeneration on the cathodesurface. The characteristics and electrochemical behavior of the prepared cobalthydroxide were also assessed through SEM, TEM, XRD, BET, and IR. Theresults proved the product to be composed of crystalline pure α phase of cobalthydroxide with sheet-like morphology at nanoscale. Evaluations of theelectrochemical behaviour of the α-Co(OH)2 nano-sheets revealed that they arecapable to delivering the specific capacitance of 1122 F g−1 at a discharge loadof 3 A g−1 and SC retention of 84% after 4000 continues discharging cycles,suggesting the nano-sheets as promising candidates for use in electrochemicalsupercapacitors. Further, the method used for the preparation of the compoundsenjoys the capability of being scaled up.
In this paper, the well-defined nano-sheets of α-Co(OH)2 were preparedthrough the cathodic electrosynthesis from an additive-free aqueous cobaltnitrate bath. The pulse current cathodic electro-deposition (PC-CED) was usedas the means for the controlling the OH− electrogeneration on the cathodesurface. The characteristics and electrochemical behavior of the prepared cobalthydroxide were also assessed through SEM, TEM, XRD, BET, and IR. Theresults proved the product to be composed of crystalline pure α phase of cobalthydroxide with sheet-like morphology at nanoscale. Evaluations of theelectrochemical behaviour of the α-Co(OH)2 nano-sheets revealed that they arecapable to delivering the specific capacitance of 1122 F g−1 at a discharge loadof 3 A g−1 and SC retention of 84% after 4000 continues discharging cycles,suggesting the nano-sheets as promising candidates for use in electrochemicalsupercapacitors. Further, the method used for the preparation of the compoundsenjoys the capability of being scaled up.
In this paper, the well-defined nano-sheets of α-Co(OH)2 were preparedthrough the cathodic electrosynthesis from an additive-free aqueous cobaltnitrate bath. The pulse current cathodic electro-deposition (PC-CED) was usedas the means for the controlling the OH− electrogeneration on the cathodesurface. The characteristics and electrochemical behavior of the prepared cobalthydroxide were also assessed through SEM, TEM, XRD, BET, and IR. Theresults proved the product to be composed of crystalline pure α phase of cobalthydroxide with sheet-like morphology at nanoscale. Evaluations of theelectrochemical behaviour of the α-Co(OH)2 nano-sheets revealed that they arecapable to delivering the specific capacitance of 1122 F g−1 at a discharge loadof 3 A g−1 and SC retention of 84% after 4000 continues discharging cycles,suggesting the nano-sheets as promising candidates for use in electrochemicalsupercapacitors. Further, the method used for the preparation of the compoundsenjoys the capability of being scaled up.