fig11

Figure 11. (A) First cycle and (inset) second cycle. This figure is reprinted (adapted) with permission from Islam et al. Copyright (2017) Elsevier^[117]. (B) Cycling performances of MGS; (C) the Ragone plot (based on the weight of cathode material) of the MGS cell; This figure is reprinted (adapted) with permission from Wu et al. Copyright (2018) Wiley-VCH^[118]. (D) Cycling stability of MnO₂ and PANI@MnO₂ electrodes after 3000cycles; (E) Scheme of the synthetic procedure for PANI@MnO₂ composite; (F) Schematic illustration of the preparation process of MnO₂/rGO/PANI. This figure is reprinted (adapted) with permission from Mao et al. Copyright (2019) Springer^[122].