High electrochemical performance of nanostructured CoOOH grown on nickel foam by hydrothermal deposition for application in supercapacitor

Abstract

In this work, nanostructured CoOOH grown on nickel foam as an electrode material for application in supercapacitor was prepared by a hydrothermal deposition strategy. The synthetic procedure includes formation of aCo(OH) 2 by epoxide precipitation, transformation of aCo(OH) 2 suspension to CoOOH colloidal solution and deposition of CoOOH particles on nickel foam by hydrothermal treatment. Due to the unique chemistry, the CoOOH particles deposited on nickel foam own extremely small size of about 3 nm. Induced by the small particle size and high conductivity of CoOOH, the as-prepared electrode material presents high electrochemical performance. It is demonstrated that the electrode material is capable of delivering high specific capacitance of 2165.1 F g -1 at scan rate of 5 mV s -1 with excellent cycle stability. It is surprising that this material presents high specific capacitance at very high current density (482.3 A g -1 at 63.9 A g -1 ).Graphical Abstract Nanostructured CoOOH was grown on nickel foam as an electrode material for application in supercapacitor through a hydrothermal deposition strategy. Due to the small particle-composed nanostructure and the high conductivity of CoOOH, the as-prepared electrode material presents high electrochemical performance.

Ionic liquids to monitor the nano-structuration and the surface functionalization of material electrodes: a proof of concept applied to cobalt oxyhydroxide

“…The capacity observed for HCoO 2 -PMIMBr is higher than most of those reported in the literature for nanostructured HCoO 2 and HCoO 2 hybridized with a conductive carbon material. [27][28][29][30][32][33][34]63 These results conrm the efficiency of the presented nano-structuration approach. Moreover, as shown in Fig.…”

Mechanism and performance of singlet oxygen dominated peroxymonosulfate activation on CoOOH nanoparticles for 2,4-dichlorophenol degradation in water

“…supercapacitor [18][19][20] and precursor for electrode materials [21,22] in industry. It turns out that CoOOH has good electronic transmission rate.…”

Two‐dimensional CoOOH as a Highly Sensitive and Selective H2S, HCN and HF Gas Sensor: A Computational Investigation

“…As another semiconducting 2D material, cobalt oxyhydroxide (CoOOH) is an emerging 2D nanomaterials with excellent light absorption capacity, high surface area, sufficient active sites, good water dispersibility and hydroxyl groups on the surface [32,33] has gained attention as an alternative gas sensor and it can be fabricated by a friendly and simple technique [34]. Moreover, CoOOH has been used as a precursor for electrode materials [35], supercapacitor [36] and gas sensor [37,38]. One unique application of CoOOH is a non-enzymatic sensor for biomolecule sensing [39].…”