Nonstoichiometry and reactivity of lithium solid electrolytes for solid state batteries
March 10-14, 2019
Ideal solid electrolytes are ion-conducting phases with negligible nonstoichiometry – as any nonstoichiometry is usually related to unwanted changes in (electronic) transport properties. In solid-state batteries the solid electrolyte experiences extreme chemical boundary conditions, from very high chemical potential of Li at the anode side to very low chemical potential at the cathode side. Depending on the electrodes, the range of chemical potential can span more than 4 V (expressed as OCV). Under these conditions, the redox chemistry and the nonstoichiometry of solid electrolytes becomes decisive for the function of the batteries itself.
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Jürgen Janek, "Nonstoichiometry and reactivity of lithium solid electrolytes for solid state batteries" in "Nonstoichiometric Compounds VII", ECI Symposium Series, (2019). https://dc.engconfintl.org/nonstoichiometric_vii/26