Abstract

The development of highly efficient batteries is a critical need in automotive industry in order to enable the future success of Electric Vehicles (EV). Active material with higher insertion potential in association with a compliant electrolyte is a way to increase Li-ion cell energy density and so EV autonomy. Moreover, green process like aqueous process for positive electrode manufacturing allows significant reduction of battery cost. This work in the framework of the European SPICY project presents results obtained on polyanionic chemistry in association with sulfolane or adiponitrile electrolyte solvent and water soluble binder stable at high voltage. Results at cell level are also presented with 17 Ah cells having same components but different formats. Models for electrochemical and thermal behavior at the levels of particles, electrodes and cells are finally presented and allow identification of the optimized cell design in terms of loading and porosity.