“…As shown in Figure 5 f, the diffusion coefficients of Mn(OH) 2 nanowire arrays are 4.5 × 10 −8 ~1.0 × 10 −9 cm 2 s −1 and 1.0 × 10 −9 ~2.7 × 10 −11 cm 2 s −1 for charging and discharging processes, respectively, reflecting the rapid ionic diffusion kinetics. Compared with other referenced cathode materials ( Table S1 ), the diffusion coefficients of Mn(OH) 2 nanowire arrays were higher than the Zn 2+ ion diffusion coefficient in MnO 2 [ 16 , 17 , 18 , 19 , 47 , 48 ], V 2 O 5 [ 20 , 21 , 49 , 50 , 51 ] and that in other related materials [ 24 , 25 , 52 ]. The high Zn 2+ ion diffusion coefficients also benefited from the specific configuration in which the vertically aligned arrangement was beneficial to electron transport and the free space between the nanowires, which can provide more ion-diffusion pathways.…”