Room Temperature Synthesis of the Larger Power, High Silver Density Cathode Material Ag₄V₂O₆F₂ for Implantable Cardioverter Defibrillators

Abstract

New cathode materials will lead to technological advances for implantable cardioverter defibrillators, ICDs, such as reduced size and increased performance of the device. While the industry standard silver vanadium oxide Ag₂V₄O₁₁ exhibits great chemical/electrochemical stability, dense silver oxide fluoride materials are advantageous because of high crystal density that can result in an increased capacity above 3 V. This report highlights the reactivity at room temperature between Ag₂O and V₂O₅ in an aqueous HF solution which affords a rapid precipitation of sub-micrometer sized Ag₄V₂O₆F₂ (SVOF), a high capacity Li-battery cathode material. This system opens new and novel synthetic strategies in the design of new oxide fluoride materials.