High energy density storage device exhibiting a reliable lifecycle is needed in the 21st\ncentury. Hence, energy storage research is critical for reducing energy consumption. Supercapacitors\nexhibit such characteristics via interfacial ion electrosorption and fast redox reactions. They are a\nfeasible solution for transportation applications, among others, due to their superb characteristics.\nIn this paper, we provide a background on supercapacitors, review public data on commercially\navailable supercapacitors for performance characteristics, and finally summarize their performance\nin terms of energy density, equivalent series resistance, and device time consistency.
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