Fig. 3: Electrochemical performances of Fe-DTPA and Ce-DTPA electrolytes.
From: Universal complexing agent enabling advanced iron-cerium redox flow batteries
a Cyclic voltammograms of 0.2 M Fe-DTPA and Ce-DTPA in the presence of 1.0 M NaCl supporting electrolyte recorded at a scan rate of 40 mV s−1. b Electrochemical window of DTPA electrolyte derived at a scan rate of 40 mV s−1. Cyclic voltammograms of (c) Fe-DTPA electrolyte and (f) Ce-DTPA electrolyte recorded at different scan rates. d, g Linear fitting curves of the square root of the scan rate to the current density. Representative cyclic voltammograms of (e) Fe-DTPA electrolyte and (h) Ce-DTPA electrolyte obtained at a scan rate of 50 mV s−1 in 500-cycle tests. During the tests conducted at 25 ± 1 °C, the electrolytes were adjusted at pH = 7 with a concentration of 0.2 M. Source data are provided as a Source Data file.
