Cathode Structure/Property Relationships: Electrochemistry and Mechanics

The electrochemical responses of battery electroactive materials are evaluated with formulations which yield porous electrodes. In this study we detail the effects of the choice of binder, homopolymer PVDF and its copolymers, and its loading level on the electrochemical performance of LiCoO2 cathodes, coupling the analysis to electrode porosity. Electrode mechanical properties are also examined and correlated with the electrochemical responses. We establish a fundamental trade-off between mechanical durability and electrochemical performance based in the need for complex porous microstructures to provide Li+ transport.