METHODS OF MAKING ELECTROACTIVE COMPOSITE MATERIALS FOR AN ELECTROCHEMICAL CELL

摘要

Methods for making electroactive composite materials for electrochemical cells are provided. The method includes introducing a particle mixture comprising a first particle having a first diameter (R₁) and comprising a first electroactive material and a second particle having a second diameter (R₂) smaller than the first diameter (R₁) and comprising a second electroactive material into a dry-coating device having a rotatable vessel defining a cavity and a rotor disposed therewithin. The vessel is rotated at a first speed in a first direction, and the rotor is rotated at a second speed greater than the first speed in a second direction opposing the first direction. The particle mixture flows between cavity walls and the rotor and experiences thrusting and compression forces that create a substantially uniform coating comprising the second electroactive material on one or more exposed surfaces of the first particle.