Fig. 1: Electrochemical and structural characterisation of a-Si electrodes. | Nature Communications

Fig. 1: Electrochemical and structural characterisation of a-Si electrodes.

From: Revealing solid electrolyte interphase formation through interface-sensitive Operando X-ray absorption spectroscopy

Fig. 1

a Electrochemical performance of two coin cells with a-Si(100 nm) thin-film anodes on Ni-coated Cu, containing either LP30 or LP30+FEC electrolytes, showing differences in coulombic efficiency (top) and charge and discharge capacities (bottom). b Voltage profiles for the first cycle of the coin cells containing LP30 and LP30+FEC electrolytes cycled to 100 mV and 5 mV. c Differential capacity plot (dQ/dV) for the first cycle of the coin cells containing LP30 and LP30+FEC electrolytes cycled to 100 mV and 5 mV (top), and of operando cells containing LP30 electrolyte cycled to 100 mV and 5 mV (bottom). We note that the active material mass used for the operando cell is based on the areal density of the a-Si electrode and the area in contact with the electrolyte as defined by a viton O-ring (see Fig. 2). d–g Scanning electron micrographs of pristine a-Si(100 nm) on Ni-coated Cu (d), after cycling to 5 mV (e) and then to 2 V (f) during the 1st cycle, and after the cycling to 2 V (g) during the 30th cycle using LP30 electrolyte with no additive. The inset of (g) shows an electrode after cycling to 5 mV during the 30th cycle. All micrographs including the inset are shown at the same scale to aid direct comparison.

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