Abstract Nowadays, imminent deficiency of fossil fuels and arising environmental concerns have triggered immense research enthusiasm for the development of green and renewable energy sources. Particularly, supercapacitors are emerging as one of the competent energy storage devices owing to their excellent capacitive properties, long term cycling stability as well as remarkable power density. In this sense, the promising family of transition metal oxides (TMO) and mixed transition metal oxides (MTMO) are felicitous as active electrode materials for supercapacitor due to their multiple oxidations states and ions possess, leading to superior specific capacitance. Moreover, hybridisation of MTMO with graphene nanosheets has received tremendous research interest owing to the peculiar intrinsic properties of graphene, which ameliorate the electrical conductivity and enlarge the specific surface area of the nanocomposite for faradiac redox reaction. In this review article, we emphasised on the current evolution of MTMO and the hybridisation of MTMO with graphene nanosheets as active electrode materials, with a comprehensive study on their synthetic approaches. In addition, the critical factors that influence the electrochemical activities of mixed transition metal oxide based materials are also delineated.

中文翻译：

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用于高级超级电容器的混合过渡金属氧化物和石墨烯/混合过渡金属氧化物基混合纳米结构的最新进展

摘要 如今，化石燃料的紧缺和环境问题的出现引发了人们对开发绿色和可再生能源的巨大研究热情。特别是，超级电容器由于其优异的电容特性、长期循环稳定性以及显着的功率密度而成为一种称职的储能装置。从这个意义上说，有前途的过渡金属氧化物 (TMO) 和混合过渡金属氧化物 (MTMO) 家族由于它们具有多种氧化态和离子，因此非常适合作为超级电容器的活性电极材料，从而导致优异的比电容。此外，由于石墨烯独特的固有特性，MTMO 与石墨烯纳米片的杂交引起了极大的研究兴趣，提高了纳米复合材料的导电性并扩大了法拉第氧化还原反应的比表面积。在这篇评论文章中，我们强调了 MTMO 的当前发展以及 MTMO 与石墨烯纳米片作为活性电极材料的杂交，并对其合成方法进行了全面研究。此外，还描述了影响混合过渡金属氧化物基材料电化学活性的关键因素。