Mesoporous 3D network Ce-doped NiO nanoflakes as high performance electrodes for supercapacitor applications

Abstract

In the present study, pristine NiO- and Ce (0.5, 1.0, 1.5, and 2%)-doped NiO nanoflakes were synthesised using the sol–gel method for supercapacitor applications.

Hydrothermal synthesis of cerium‐doped Co 3 O 4 nanoflakes as electrode for supercapacitor application

“…The above-mentioned observations suggest that Ce 3+ ions (with ionic radius 114 pm) have substituted Co 3+ ions (ionic radius 63 pm). 33,38 Further doping of Ce, that is, 7.0 at. % failed to reveal any further change in diffracted peaks suggesting that the optimum concentration of Ce for doping in Co 3 O 4 crystal lattice is upto 5.0 at.…”

“…Due to this characteristic, Ce can be used as a dopant to advance the electrochemical properties of some TMOs/hydroxides. 5,33,34 They also observed that conductivity of manganese oxide was significantly enhanced due to doping of cerium ions. Moreover, the appropriate doping of cerium atoms has modified the morphology of manganese oxide particles resulting into shortening of ions transportation path, which provided much better conductivity.…”

“…31 In addition to this, the metal doping into Co 3 O 4 can also increase the conductivity of a nanomaterial, which is highly beneficial for enhanced performance of supercapacitor. [32][33][34][35] Electronic, physical and chemical characteristics of TMOs-based materials can be significantly improved by doping with an appropriate metallic element. [30][31][32] Recently, Huiyu Chen et al 13 reported that Mn-doped Co 3 O 4 delivers improved specific capacitance, that is, 773 F/g and excellent capacitance retention.…”

Facile preparation and characterization of novel manganese doped nickel oxide based nanostructured electrode materials for application in electrochemical supercapacitors

“…Ni 0.95 Co 0.025 Mn 0.025 O 1−δ showed a specific capacitance of 673.33 F g −1 at a current density of 0.5 A g −1 [19]. Ce-doped NiO nanoflakes were synthesized by sol-gel method and they exhibited a specific capacitance of 2444 F g −1 which is three times that of the pure NiO materials [20]. La 3+ -doped NiO microspheres with porous structure was prepared simple hydrothermal method.…”

Organic template-based ZnO embedded Mn3O4 nanoparticles: synthesis and evaluation of their electrochemical properties towards clean energy generation

“…Zinc oxide is an interesting transition metal oxide due to its chemical stability, abundance and wide applications in optical and electronic devices making it the best t for wide application, 13 but its poor electric conductivity and high resistance limits its use as electrode material. [14][15][16] To overcome this problem, a principle approach is to tailor the morphology in order to enhance the surface area of ZnO. It is well known that high surface area improves the chargetransfer capability and enriches the interaction of electrolyte with the electrode surface thus enhancing the diffusion of ions.…”