Comparative studies of nanosheet-based supercapacitors: A review of advances in electrodes materials

In the construction of supercapacitors, various nanocomposites have been utilized to fabricate electrodes. Nanocomposite electrodes based on two-dimensional (2D) nanomaterials have recently received much attention due to their unique propertices. The recent development of supercapacitors was mainly summarized regarding nanosheet electrodes. The types of supercapacitors were basically compared on the basis of electrode materials, cyclic stability, specific capacitance, power, and energy densities for 2D nanomaterial electrodes as well. This Review discusses novel findings of the critical nanosheet-based supercapacitors including MXenes, graphene, and carbon nanomaterials electrodes. Comparison between the results of MXene, graphene, and carbon nanomaterials-based supercapacitors showed that the specific capacitance almost is less than 3000 F g−1 and capacitance retention is in the range of 70–100 %. This study also provides an opportunity for future researchers in the construction of energy storage devices to recognize novel breakthroughs in the fabrication of supercapacitor electrodes relevant to nanosheets.

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