Fig. 4From: Na4Mn9O18/Carbon Nanotube Composite as a High Electrochemical Performance Material for Aqueous Sodium-Ion BatteriesElectrochemical performance of NMO/CNT electrode. (a) CV behavior of NMO/CNT electrode at a scan rate of 0.1 mV s−1. (b) Discharge/charge voltage profiles of NMO/CNT electrode for the 1st, 2nd, 3rd, and 4th cycles at 4 CBack to article page