fig3

Figure 3. Electrochemical performance of β-MnO₂ and R-Fe_xMn_1-xO₂ cathodes of (A) cycling performance [Coulombic Efficiency (CE)]; (B) rate capabilities; (C) The GCD curves; (D) GITT profiles and corresponding ion diffusion coefficients of AZIBs; (E) CV curves at scan rate of 0.1 mV s^-1. (F) radar chart comparing properties of Mn-based cathodes for AZIBs. GCD: Galvanostatic charge-discharge; GITT: galvanostatic intermittent titration technique; AZIBs: aqueous zinc-ion batteries; CV: cyclic voltammetry.