Direct synthesis of porous NiO nanowall arrays on conductive substrates for supercapacitor application

Solution growth of NiO nanosheets supported on Ni foam as high-performance electrodes for supercapacitors

“…The charging/discharging measurements are carried out in a 3 M KOH electrolyte at various current densities ranging from 5 to 25 A g -1 , as shown in Figure 6c. The specific capacitance of the electrode can be calculated from the CV curves according to the following equation [22]:…”

In situ preparation of flower-like α-Ni(OH)2 and NiO from nickel formate with excellent capacitive properties as electrode materials for supercapacitors

“…The flower-like NiO also shows a superior long cycling life with a pretty high capacitance retention of 86% after 1080 cycles. Besides, both a-Ni(OH) 2 and NiO experience the specific capacitance increase during the first 200 cycles and this is believed to be resulted from the surface activation process and micro-pore opening of the flowerlike electrode materials [5,14,15,17]. As a whole, flowerlike a-Ni(OH) 2 should be a better active material for supercapacitors in comparison with NiO with the same architecture owing to its better electrochemical properties.…”

Vapor-phase polymerization of poly(3,4-ethylenedioxythiophene) (PEDOT) on commercial carbon coated aluminum foil as enhanced electrodes for supercapacitors

“…Among the many examples, PEDOT has become one of the most successful materials for electronics applications. Compared with other polythiophene derivatives, PEDOT has several advantages: it is very stable in its oxidized state due to its low oxidation potential and moderate bandgap (~1.6 eV) [16]. The addition of two heteroatoms to the thiophene monomer has been suggested to stabilize the positive charge centered on the sulfur atom, while connecting these two atoms to form a second ring was intended to reduce steric hindrance and to allow the polymer to adopt the most favorable conformation, resulting in high conductivity [17].…”