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Surfactant free gram scale synthesis of mesoporous Ni(OH)2–r-GO nanocomposite for high rate pseudocapacitor application

We report a single-step surfactant-free gram scale hydrothermal synthesis of mesoporous Ni(OH)2 nanoparticles and the Ni(OH)2–reduced graphene oxide (Ni(OH)2–r-GO) nanocomposite. Interesting morphological features are noted. These nanomaterials are examined and compared as cathode materials for pseudo-capacitor application through detailed characterizations. A high specific capacitance (Cs) of 1538 F g−1 is observed for Ni(OH)2–r-GO even at a high current density of 40 A g−1, whereas at the same current rate, bare Ni(OH)2 shows Cs of only 936 F g−1.