Fig. 7From: Na4Mn9O18/Carbon Nanotube Composite as a High Electrochemical Performance Material for Aqueous Sodium-Ion Batteries (a) EIS spectra of NMO and NMO/CNT electrodes at the fresh cycle and the equivalent circuit model of plot fitting (inset). (b) EIS spectra of NMO/CNT electrode at the fresh cell, 10th, 50th, and 100th cyclesBack to article page