Fig. 2: Redox potential and symmetric cell test.
From: Phosphonate-based iron complex for a cost-effective and long cycling aqueous iron redox flow battery
a Cyclic voltammograms of 0.67 M Fe-NTMPA2 complex electrolyte recorded at a scan rate of 2.5 mV·s−1 with two different working electrodes, glassy carbon (black) and carbon paper (red). b Symmetric cell testing results of 0.67 M Fe-NTMPA2 as both catholyte and anolyte for 100 cycles at a current density of 20 mA·cm−2. c Typical voltage profile and (d) differential capacity analysis for the symmetric cell test.
