Fig. 8
The effects of disorder structure on the potential window. a Oxygen K-edge sXAS of electrochemically cycled Na0.27MnO2, Mn5O8 and commercial MnO2 materials; b CV scans of disordered Na0.27MnO2, ordered Na0.19MnO2 and commercial MnO2 materials at the scan rate of 5 mV s−1 in a 2.5 V potential window in half-cell; c calculated Tafel slopes of HER and OER at the scan rate of 5 mV s−1; d Specific capacities at the scan rate of 5, 10 and 50 mV s−1
