Recent Advance in Co3O4 and Co3O4-Containing Electrode Materials for High-Performance Supercapacitors

Abstract

Among the popular electrochemical energy storage devices, supercapacitors (SCs) have attracted much attention due to their long cycle life, fast charge and discharge, safety, and reliability. Transition metal oxides are one of the most widely used electrode materials in SCs because of the high specific capacitance. Among various transition metal oxides, Co3O4 and related composites are widely reported in SCs electrodes. In this review, we introduce the synthetic methods of Co3O4, including the hydrothermal/solvothermal method, sol–gel method, thermal decomposition, chemical precipitation, electrodeposition, chemical bath deposition, and the template method. The recent progress of Co3O4-containing electrode materials is summarized in detail, involving Co3O4/carbon, Co3O4/conducting polymer, and Co3O4/metal compound composites. Finally, the current challenges and outlook of Co3O4 and Co3O4-containing composites are put forward.

Hydrothermal synthesis of cerium‐doped Co 3 O 4 nanoflakes as electrode for supercapacitor application

“…A large number of TMOs based materials including CeO 2, 9 MnO 2, 10 NiO, 11 Fe 2 O 3 12 and Co 3 O 4 are being used for supercapacitor applications 13 . Among of these TMOs‐based materials, Co 3 O 4 is cost‐effective, environmental‐friendly and offers large theoretical specific capacitance of 3560 F/g 14,15 . This material (cobalt oxide) can exist in three forms known as cobaltosic oxide (Co 3 O 4 ), cobaltic oxide (Co 2 O 3 ) and cobaltous oxide (CoO).…”

“…13 Among of these TMOs-based materials, Co 3 O 4 is cost-effective, environmental-friendly and offers large theoretical specific capacitance of 3560 F/g. 14,15 This material (cobalt oxide) can exist in three forms known as cobaltosic oxide (Co 3 O 4 ), cobaltic oxide (Co 2 O 3 ) and cobaltous oxide (CoO). In comparison to others, the cobaltosic oxide (Co 3 O 4 ) possesses more stable structure, and it is easier to fabricate and catalytically more active; hence, on the bases of these interesting behavior, it is widely studied and used for electrochemical applications.…”

Low-Dimensional Nanostructures Based on Cobalt Oxide (Co3O4) in Chemical-Gas Sensing

“…Both the techniques are executed in steel autoclaves with or without Teflon liners under specific growth conditions such as pressure, temperature, reactant concentration, and duration which are known to tune morphology and crystal structure as shown in Figure 9a-h. Additionally, a comprehensive comparison on each method is found in Wang et al [58].…”

Synthesis and Characterization of Zinc Vanadate Nanostructures for Supercapacitor Applications

“…In recent years, many research groups have used metal vanadates (Mn, Zn, Cu, Ni, Co, Fe, etc.) as electrodes, and considerable effort has been made to synthesize various kinds of nanocomposite capacitive materials as mixed metal oxides [18][19][20]. V 2 O 5 layered structure allows for more interlayer locations for various guest species to intercalate [21].…”