HIGH PERFORMANCE COMPOSITE ELECTRODE MATERIALS

摘要

A composite electrode material is fabricated from a first electroactive material which manifests a first mean voltage, a first energy density and a first high cutoff voltage cycle life; and a second electroactive material which manifests a second mean voltage which is less than the first mean voltage, a second energy density which is less than the first energy density, and a second high voltage cutoff cycle life which is greater than the first cycle life. The composite material may include a simple mixture of particles of the first and second materials, or may comprise a complex structure such as a core/shell structure wherein the second material covers a portion of the surface of particles of the first material. Also disclosed herein are electrodes which incorporate the material, batteries which incorporate the electrodes, and methods for making the foregoing.