Significantly improved conductivity of spinel Co₃O₄ porous nanowires partially substituted by Sn in tetrahedral sites for high-performance quasi-solid-state supercapacitors

Abstract

Porous spinel-structured Co3O4 nanowires partially substituted by Sn in octahedral sites (CSO) were grown on multi-layered graphene film (CSO@GF) with a high specific surface area (SSA) through a simple and...

Water-based asymmetric supercapacitors with 2.5 V wide potential and high energy density based on Na0.6CoO2 nanoarray formed via electrochemical oxidation

“…In the XRD pattern of Co 3 O 4 /CC, except for the characteristic peak of CC at 2 q ¼ 25.7 , other diffraction peaks are well corresponding to spinel Co 3 O 4 (JCPDS No. 42e1467) [24], which proves that we have successfully synthesized spinel Co 3 O 4 with high purity on CC substrate. After 600 cycles of EO, all characteristic peaks of Co 3 O 4 disappear and new diffraction peaks appear instead.…”

Facile Access to Ni/Co-Based Nanoscale Coordination Polymers for the Boosted Electrochemical Performance of Asymmetric Supercapacitors

“…Both profiles show conspicuous redox peaks, implying a typical behavior of pseudocapacitance . The current density and larger curve area of Ni/Co-nCPs are higher than those of Ni-nCPs, indicating that Ni/Co-nCPs with the mixed Ni and Co species have a higher specific capacitance . Moreover, the introduction of Co ions results in Ni/Co-nCPs having a lower oxidation potential and higher reduction potential compared to Ni-nCPs.…”

“…38 The current density and larger curve area of Ni/Co-nCPs are higher than those of Ni-nCPs, indicating that Ni/Co-nCPs with the mixed Ni and Co species have a higher specific capacitance. 39 Moreover, the introduction of Co ions results in Ni/Co-nCPs having a lower oxidation potential and higher reduction potential compared to Ni-nCPs. The lower oxidation potential and higher reduction potential mean that Ni/Co-nCPs can undergo oxidation reactions for charge storage at a lower potential and charge release at a higher potential, respectively, which suggests that Ni/Co-nCPs can perform charge storage and release more easily.…”

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

“…The characteristic redox peaks observed in the CV curves reveal that Co-based electrode materials are typical battery-type electrodes. 12,38 Fig. 3d is GCD curves of Co 2 P@Co 3 O 4 nanocomposite electrode at different current densities, respectively.…”

“…The characteristic redox peaks observed in the CV curves reveal that Co-based electrode materials are typical battery-type electrodes. 12,38…”