Composite material for supercapacitor electrodes

A method of making a NiMoO4-CoMoO4 composite material synthesized via a facile one-step chemical bath deposition method followed by a heat treatment so as to produce flower-like NiMoO4—CoMoO4 nanosheet arrays, the method consisting of the steps of:

• mixing a nickel salt, a cobalt salt and a molybdenum oxide salt with urea and ammonium fluoride to form a mixture, wherein the nickel salt, the cobalt salt and the molybdenum oxide salt are Ni(NO3)2, Co(NO3)2, and Na2MoO4, respectively;
• heating the mixture at a first temperature for a first time in the presence of a nickel foam substrate to form a substrate loaded with the composite material, wherein the first temperature ranges from about 80° C. to about 120° C. and the first time ranges from about 4 hours to about 8 hours;
• rinsing the loaded substrate;
• and
• annealing the loaded substrate at a second temperature for a second time, wherein the second temperature ranges from about 100° C. to about 300° C. and the second time ranges from about 1 hour to about 3 hours.