The construction of a sandwich structured Co₃O₄@C@PPy electrode for improving pseudocapacitive storage

Abstract

The fabrication of sandwich structural CO3O4@C@PPy electrode for improving rate capability and areal capacitance.

MoS2 Nanosheet-Polypyrrole Composites Deposited on Reduced Graphene Oxide for Supercapacitor Applications

“…The two binding energies at 401.4 and 398.5 eV are corresponding to −NH + − and N− in the pyrrole ring (Figure 4c). 44,45 The binding energies in the C 1s spectrum at 287.8, 285.4, and 284.8 eV are associated to carbon functional groups of CO, C−N, and C−C, respectively (Figure 4d). 46 Thus, the XPS spectra also confirm the three components of MoS 2 , PPy, and rGO in the MP-rGO composite.…”

Recent Progress in Co3O4‐Based Nanomaterials for Supercapacitors

“…Figure 27b depicts Co 3 O 4 @C@PPy morphology structure can be seen Co 3 O 4 @C@PPy nanowire arrays were uniformly grown on the surface of nickel foam substrate. Figure 27c∼f compares Co 3 O 4 , Co 3 O 4 @C and Co 3 O 4 @C@PPy electrochemical properties, indicating that Co 3 O 4 @C@PPy performs best in specific capacitance, rate capability and cycle stability [182] . Through the above discussion and analysis, in order to improve the electrochemical performance of Co 3 O 4 base, the conduction of conductive polymer provides a large surface area and a short diffusion path for ion transfer, contributing more pseudo capacitance.…”

“…[181] rate capability and cycle stability. [182] Through the above discussion and analysis, in order to improve the electrochemical performance of Co 3 O 4 base, the conduction of conductive polymer provides a large surface area and a short diffusion path for ion transfer, contributing more pseudo capacitance. Ternary composite of organic polymer with metal oxide or carbon material.…”

Mixed ionic–electronic conduction and defect chemistry of (Na0.5Bi0.5TiO3)1−x(BiCoO3)x (0 ≤ x ≤ 0.06) solid solutions

“…From the literature, BE for Co 3+ 2p 3/2 is usually ∼780 eV, and that for Co 2+ lies between 781 and 782 eV. [41][42][43] Yu et al 44 assigned the peak at 781.1 eV to a mixed state of Co 2+ and Co 3+ , and Wu et al 45 assigned the peak at 780.1 eV to Co 3 O 4 . Nevertheless, the presence of Co 2+ is evident considering the BE value, albeit quantitative analysis of the relative fraction of Co 2+ and Co 3+ is not possible based on the Co 2p spectrum.…”