Engineered NiCo-LDH nanosheets- and ZnFe2O4 nanocubes-decorated carbon nanofiber bonded mats for high-rate asymmetric supercapacitors

Electrical Conduction in CoWO4 Flanked by Carbon and ZnFe2O4 Nanoparticulate Assembly and a Poly(ethylene oxide) Gel for Enhanced Electrochemical Activity

“…The specific capacitances (SCs) for CoWO 4 and ZnFe 2 O 4 are 575 C g –1 and 578 F g –1 at 1 A g –1 , and they reduce by 3 and 3.6%, respectively, when current density is increased to 5 A g –1 . In the past, SCs of 1127, 128, and 271 F g –1 at 1 A g –1 have been reported for CoWO 4 based electrodes and 471 (at 5 mV s –1 ), 282, and 98 F g –1 (at 1 A g –1 ) for ZnFe 2 O 4 and composites. , Our values are superior to the reported values, and these are achieved for materials that are grown by direct oversimplified chemical routes. These results evidently validate the fabrication of a CoWO 4 @C//ZnFe 2 O 4 asymmetric supercapacitor for the two materials work very well independently over the positive and negative potential ranges.…”

Performance degradation study of NiCo2O4-based asymmetric supercapacitors

“…It can be seen from the full-frequency impedance spectrum that the internal resistance and charge transfer resistance of NiCo 2 O 4 electrode are very small, and the impedance is mainly determined by the Warburg impedance in the process of material transfer. 22,23…”

High-rate transition metal-based cathode materials for battery-supercapacitor hybrid devices

“…In addition, the in situ growth method avoids the use of polymer binders, which significantly improves electron transfer and ion diffusion. 48,68,103 Chen et.al reported a composite electrode consisting of a vertical, ordered arrangement of NiCo 2 S 4 nanoflakes covered by elongated nickel columns (Fig. 8a).…”