Figure 4
From: High energy storage capabilities of CaCu3Ti4O12 for paper-based zinc–air battery

ORR electrochemical analysis in 0.1 M KOH solution, O2 purged (a) RDE graphs of CCTO at different rotations in the potential range of 1.5 to − 0.5 V; (b) Koutecky–Levich graph of the material at various potentials (V).