Extended Data Fig. 7: Electrochemical performance of the CeH2 | 3CeH3@BaH2 | NaAlH4 battery.
From: A room temperature rechargeable all-solid-state hydride ion battery
a, The rate capability of the hydride ion battery. Because of substantial capacity fading during the first few cycles, data collection commenced from the tenth cycle. b, Cyclic voltammetry (CV) curves of the CeH2 | 3CeH3@BaH2 | NaAlH4 battery at different sweep rates. There are obvious oxidation and reduction peaks in the CV curves, and the peak positions correspond to the highest rates of charge and discharge processes. The areas belonging to the positive and negative currents are nearly the same, indicating reversibility of the electrode reactions. c, Logarithm peak current (i) versus logarithm sweep rate (v) plots to determine the b-value of redox peaks. The b values of three redox peaks were calculated to be 0.610, 0.533, and 0.508, respectively, suggesting that this battery mainly follows a diffusion-dominated process36.
