Figure 5
From: Monocarborane cluster as a stable fluorine-free calcium battery electrolyte
(a) Electrochemical performance of the Ca–S batteries with the CMC/DME/THF electrolyte in a voltage window of from 0.5 to 3.2 V; the inset shows differential capacities (dQ/dV), derived from the corresponding charge–discharge curve. (b) X-ray photoelectron spectroscopy (XPS) S 2p spectra of the S/C electrodes in the pristine (top) and discharged (bottom) states.
