Large‐area α‐MnO2 nanoflower arrays are synthesized by using a facile and template‐free electrochemical deposition on flexible graphite paper. These nanoflower arrays exhibit a high specific capacitance of 314 F g−1 at a current density of 1 A g−1 with remarkable rate capability (61.1 % retention at 40 A g−1) and excellent cycle stability. Furthermore, the fabricated flexible symmetric supercapacitor also displays good performance and flexibility.
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Li et al. (2014) studied this question.
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