Reviews and Prospectives of Co₃O₄‐Based Nanomaterials for Supercapacitor Application

Abstract

Supercapacitors are considered to be one of the most promising development directions of energy storage systems because of their low cost, environmental protection and high energy density. The performance of supercapacitors is determined with the quality of electrode materials. Co3O4, a kind of electrode material for supercapacitor, has attracted more and more attention in recent years due to its advantages of high theoretical capacity, low cost and natural abundance. In this review, the synthesis and electrochemical properties of Co3O4‐based electrode materials are discussed in detail. Finally, the research and development prospect of Co3O4‐based electrode materials have been discussed.

Co2P decorated Co3O4 nanocomposites supported on carbon cloth with enhanced electrochemical performance for asymmetric supercapacitors

“…Among the multifarious TMOs, Co 3 O 4 has been regarded as a battery-type electrode for potential application in SCs owing to its high capacitance, high activity towards the faradaic redox reaction and excellent reversibility. 15,16 Until now, a series of Co 3 O 4 with various types of morphologies, such as nanoparticles, 17 nanowires, 18 nanosheets, 4,19 nanoflowers 20 and nanoboxes, 21 have been successfully synthesized as designed. However, the electrochemical performances of most of the pure Co 3 O 4 nanomaterials are relatively unsatisfactory because of the inherent poor electrical conductivity, leading to slow electron transfer and a low ion adsorption/desorption rate, resulting in low specific capacitance and poor rate performance.…”

Cobalt oxide-based nanomaterial for electrochemical sensor applications

“…This is the reason that p-type oxides material is the potential candidate for the development of new chemiresistors Amongst the p-type oxides catalyst spinal Co3O4 a mix valence oxide of CoO and Co2O3 with high oxygen contents have also been used extensively. Co3O4 has been investigated intensively in many studies such as energy storage and conversion applications [21], sensors [7], electrochemistry [22], and magnetism [23] as a potential catalyst. The spinal Co3O4 has proved itself as an attractive material for sensing application due to its higher theoretical surface area (2630 m 2 g -1 ) [24], charming optical, magnetic and transport properties [25], high surface to volume ratio [6] and higher theoretical capacity (890 mAhg -1 ) [26].…”

“…The spinal Co3O4 has proved itself as an attractive material for sensing application due to its higher theoretical surface area (2630 m 2 g -1 ) [24], charming optical, magnetic and transport properties [25], high surface to volume ratio [6] and higher theoretical capacity (890 mAhg -1 ) [26]. Recent studies proved that cobalt oxides' morphological tuning can further enhance their electrochemical properties [21]. Co3O4, magnetic p-type semiconductors, have direct and indirect band gaps of 2.10 eV and 1.60 eV, respectively [27].…”

Dandelion‐like CoO/Co3O4/Carbon Composites as Anode Materials for a High‐Performance Lithium Ion Battery

“…[5,6] However, biomass-derived carbons cannot be directly used as electrode materials due to its low capacity, and the hybrid with metal oxides with the high specific capacity is always adopted to make up for its low capacity, such as CoO, Co 3 O 4 , etc. [7][8][9] The metal oxides also have some disadvantages such as poor conductivity and easy volume expansion during charging/ discharging, which is not conducive to the stability of the electrode. [10][11][12] It has been proven that the biomass-derived carbons could alleviate the disadvantages of metal oxides and lead to better distribution of metal oxides.…”

“…Therefore, biomass‐derived carbons show great potential in LIBs [5,6] . However, biomass‐derived carbons cannot be directly used as electrode materials due to its low capacity, and the hybrid with metal oxides with the high specific capacity is always adopted to make up for its low capacity, such as CoO, Co 3 O 4 , etc [7–9] . The metal oxides also have some disadvantages such as poor conductivity and easy volume expansion during charging/discharging, which is not conducive to the stability of the electrode [10–12] .…”