Nanostructure based energy storage devices with high surface area and conductivity are
challenging requirements, which are extensively focused in the past few years. Recently, the
nanostructures synthesis by microwave energy has become an increasingly popular theme among the
scientific community to fulfill the energy storage demands at commercial scale. Since, microwave
heating has reduced reaction times and side reactions with increased product yields and purity as compared
to conventional heating methods. The high product yield is favorable at the industrial level,
which is not possible by other synthesis techniques. On the other hand, supercapacitors have wide future
applications, such as replacement of Li-Ion batteries due to cost effectiveness, high shelf-life and
stable cycle life. Among various types of supercapacitors NiO has shown comparable
supercapacitance to RuO2. A comprehensive overview of all synthesis techniques and reported
supercapacitance results in comparison with microwave-assisted synthesis of NiO nanostructures are
provided in this review article.
Keywords: Microwave, nanostructures, supercapacitors, nickel oxide, energy density, power density, high-shelf-life.
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