A study of charge density distribution and enhanced electrochemical properties of zinc cobaltite/polyaniline nanocomposite for supercapacitor application

Recent progress in ZnCo2O4 and its composites for energy storage and conversion: a review

“…Several carbonaceous materials can be derived from ZnCo2O4 as composites encompassing carbon nanotubes (CNTs) 129,134 , carbon nanoparticles 97,100 , N-doped carbon 132 , reduced graphene oxide (rGO) 106,130,133 , polyaniline (PANI) 131,136 and graphitic-carbon nitride (g-C3N4) 135 in slurry-casted electrodes, and carbon 143 , N-doped carbon 138,140 , rGO 109,137,139,141,142 , polyvinylpyrrolidone (PVP) 66 and polypyrrole (PPy) 57,144 in binder-free electrodes.…”

“…ZnCo 2 O 4 /carbon material composite electrodes. Several carbonaceous materials can be derived from ZnCo 2 O 4 as composites encompassing carbon nanotubes (CNTs), 129,134 carbon nanoparticles, 97,100 N-doped carbon, 132 reduced graphene oxide (rGO), 106,130,133 polyaniline (PANI) 131,136 and graphitic-carbon nitride (g-C 3 N 4 ) 135 in slurry-cast electrodes, and carbon, 143 N-doped carbon, 138,140 rGO, 109,137,139,141,142 polyvinylpyrrolidone (PVP) 66 and polypyrrole (PPy) 57,144 in binderfree electrodes. Accordingly, is should be possible to explore the combined effects of electric double-layer capacitance (EDLC) from carbonaceous materials, and pseudocapacitance from transition metal oxide materials.…”

“…They can hinder charge transfer, resulting in low capacitance and poor rate capability, including cyclability, in accordance with theoretical expectations. 100 Polymers, e.g., PANI, 131,136 g-C 3 N 4 135 and PVP, 66 can act as support materials for ZnCo 2 O 4 , while PPy 57,144 has been explored as a shell material in core@shell architectures. Embedding ZnCo 2 O 4 in g-C 3 N 4 , a mesoporous sheet-like soft polymer, can produce g-C 3 N 4 @ZnCo 2 O 4 (1386 F g À1 at 4 A g À1 ) 135 (Fig.…”

“…Polymers, e.g., PANI 131,136 , g-C3N4 135 and PVP 66 , can act as support materials for ZnCo2O4, while PPy 57,144 has been explored as shell materials in core@shell architectures.…”

“…As a result, nanosheet-like ZnCo2O4/N-GO/PANI (720 F g -1 at 1.5 A g -1 ) 131 (Figure 10C), based on ZnCo2O4/N-GO coverage with multifaceted PANI, and PANI/ZnCo2O4 nanoparticles (867 F g -1 at 0.5 A g -1 ) 136 (Figure 10D) slurry-casted electrodes exhibited significant changes in size, shape, specific surface area, bond length, electron density, and other parameters. Both delivered excellent cyclability and specific capacitance in comparison to the ZnCo2O4/N-GO nanocomposite 131 and pristine ZnCo2O4 NPs 136 .…”