Recent development in spinel cobaltites for supercapacitor application

Abstract

Precious metal oxides exhibit impressive characteristics that caught worldwide attention due to their promising capacitive performance, excellent electrochemical stability and low resistance, and these metal oxides have been extensively employed in supercapacitor application. This type of supercapacitors is known as redox supercapacitors or pseudocapacitors which applied faradaic process in storing energy in their systems. Thus, new materials with impressive electrochemical performance are highly demanded. In this aspect, cobaltite system with spinel structure has been the subject of intense research due to its established applications in electrochemistry. Besides, carbonaceous materials like activated carbons, carbon nanotubes, graphites, graphenes and fullerenes utilize electric double-layer capacitance whereby energy is stored by charge separation at an electrode/electrolyte interface. With greater development conducted on metal oxides and carbonaceous materials for supercapacitor application, introduction of hybrid and composite electrodes comprise of these two types of materials have been well received.

Mesoporous composite nickel cobalt oxide/graphene oxide synthesized via a template-assistant co-precipitation route as electrode material for supercapacitors

“…1c), like 2q ¼ 32 (220), 36.7 (311), 44.6 (400), 60.0 (511), 64.7 (440) are consistent with the standard powder diffraction patterns of NiCo 2 O 4 rock salt structure (JCPDS card no. 73-1702) [17,28,29]. No other peaks were Scheme 1.…”

Efficient degradation of sulfamethazine with CuCo2O4 spinel nanocatalysts for peroxymonosulfate activation

“…Thus, the mechanism for PMS activation by "Cu 2þ deserves further research. Spinel cobaltites, one kind of spinel with cobalt at the B-sites, have gained worldwide recognition for their super electrochemical properties [24]. These properties are significant in the interfacial processes with redox reactions.…”

Synthesis Characterization of Nanostructured ZnCo2O4 with High Sensitivity to CO Gas

“…Among the p-type semiconductors, zinc cobaltite (ZnCo 2 O 4 ) is a material with spinel-type structure, which has been mainly used as electrode for Li-ion batteries [7][8][9][10][11] and supercapacitors [12][13][14][15], due to its higher electrochemical performances and higher conductivities. To date, sensor devices based on nanostructured spinel ZnCo 2 O 4 have particularly exhibited an excellent sensitivity toward liquefied petroleum gas [16][17][18], ethanol [19,20], acetone [21], Cl 2 [22], formaldehyde [23], and Xylene [24].…”