Engineered Three-Electrode Cells for Improving Solid State Batteries

A three electrode cell for use with solid electrolytes is presented. The cell provides a stable reference voltage and leads artefact-free impedance spectra while being easily assembled and air-tight. To prove its versatility, several combinations of electrodes and electrolytes were employed, enabling rapid assessment of the main differences between argyrodite vs lithium phosphorous sulphide electrolytes, oxide vs sulphide active materials or Li-In alloy based anode vs Li foil anode. This new cell design offers a simple and efficient way of identifying the proper electrode-electrolyte components for enhancing solid state battery performances.