Abstract: The present technology discloses lithium metal polyanion (LMX) compounds. The battery cell including the LMX compounds as cathode may have a gravimetric capacity exceeding 170 mAh/g. The present technology utilizes machine learning to provide synthesis conditions and the stoichiometry of the LMX compounds to maximize the gravimetric energy density of a battery cell.

Abstract: The present technology discloses lithium metal polyanion (LMX) cathode compounds which contain a mixture of SiO4 and PO4 anions. Compounds based on silicate SiO4 anions can exhibit significantly higher gravimetric capacities than conventional lithium iron phosphate (LFP) materials. The present technology offers electrochemical advantages of the LMX compounds over compounds fabricated with only SiO4 anions. Machine learning can be used to provide the synthesis conditions and the stoichiometry of LMX compounds to maximize the gravimetric energy density of a battery cell.

Abstract: A method includes accessing one or more models of battery cathode synthesis, battery cell prototyping, battery cell testing, or a combination thereof. The method also includes applying the one or more models for controlling one or more steps in a battery production workflow.

Abstract: A secondary battery includes: 1) a negative electrode compartment including a molten metal negative electrode material which includes K; 2) a positive electrode compartment; and 3) an electrolyte disposed between the negative electrode compartment and the positive electrode compartment, wherein the electrolyte is an ion-conducting solid electrolyte.