Cathode Dissolution as a Battery Failure Mechanism in Silver Vanadium Oxide (SVO) and Structurally-Stabilized SVO-Analogue Materials Using Phosphate (PO43-)
In this study, a series of vanadium oxide and phosphate based cathode materials are studied relative to their dissolution in battery electrolyte. Kinetic analysis of the results provides a quantitative framework for rationalizing the impact of structure and composition on dissolution. Further, the result of cathode solubility at the systems level is investigated shedding light on the interaction of the negative electrode with the dissolved transition metal species. The findings are used to provide a conceptual model for the resultant impedance rise.