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CV curves of electrodes made of rGO (mentioned as GR), on multiwall CNT (here as MCNT), their combination GR/MCNT (a, left), and their composite with MnO2 (GR/MCNT/MnO2) as well as GR/MnO2 and MCNT/MnO2 at a scan rate of 5 mV/s (a). GCD curves of GR/MCNT/MnO2 at different current densities (b) (Reproduced with permission of [51]. Copyright Elsevier, 2012).
