Trisodium citrate assisted synthesis of hierarchical NiO nanospheres with improved supercapacitor performance

A facile hydrothermal reflux synthesis of Ni(OH)2/GF electrode for supercapacitor application

“…4a shows the CV curves of Ni(OH) 2 and Ni(OH) 2 /GF electrodes at a sweep rate of 10 mV s oxidation reaction of Ni(OH) 2 to NiOOH, and the cathodic peak showed the reverse process. The reaction process can be expressed as [39]: Fig. 4a clearly shows that Ni(OH) 2 /GF has higher enclosed area, signifying its superior current response and thus its better electrochemical performance [40].…”

Synthesis of Mn3O4 nanoparticles via chemical precipitation approach for supercapacitor application

“…Therefore, the transition metal oxides can greatly improve the energy density of supercapacitor. Various transition metal oxides were used as the electrode materials for supercapacitors, such as RuO 2 [14], NiO [15], Co 3 O 4 [16], SnO 2 [17] and manganese based oxides [18][19][20][21][22]. Among these materials, RuO 2 was the most widely studied metal oxide due to its high conductivity and high specific capacitance as well as its excellent chemical stability [23].…”

Efficient and Flexible Supercapacitors Assembled on Metal Spikes

“…Figure 3e shows that different nickel oxides workedw ell on the spike electrode, and that the capacitance first increased and then decreased as the amount of ethanol increased.T he capacitance of different nickel oxides follows the order nanospheres < nanoworms < nanopetals,w hichi s similart ot hat of traditional flat electrodes. [32][33][34] Although previously reported capacitive materials have been optimized by basing them mainlyo nf lat electrodes, [13][14][15][16][17] they could not only inherit ah igh capacity after being assembled on the spike electrode, but also take advantage of the high specific area of the electrode. This process providesasupplementary method for furtherm ultiplying the capacitive performance of the electrode.…”