SPICY focuses on polyanionic phosphates as a positive electrode material for Li-ion batteries. LiFePO4 is well known as a safer and more durable cathode material. Unfortunately, its energy density is low due to the electrochemical potential of Fe. One objective of SPICY is to bind metals having a higher potential than Fe, allowing an increase of the material potential, and thus a higher energy. Regarding the anode material, SPICY investigates two chemistries. Graphite is used in current Li-ion cells and remains one of the major anode materials for the next generation of Li-ion cells. Silicon is appropriate for high energy cell applications but has lower cyclability. Silicon is investigated through new synthesis process methods providing nanoparticles and core-shell structures to improve particle stability. Active and passive components will be harmonized for a higher energy density i.e. polyanionic phosphate /graphite up to 200 Wh/kg, and polyanionic/Si up to 230 Wh/kg. In addition, three cells architectures and packaging are studied. The thermal behaviour of these cells is examined during ageing tests in order to model Li-ion cells. Finally, SPICY materials and cell prototypes will be developed considering eco-design conception (materials selection, manufacturing process) and will include recycling activity. There will be a global economic strategy and assessment to confirm that the project solutions would allow one to sell the EV cell at a cost from 220-290 €/kWh in 2020. This cost will be reduced considering the improvement of materials performances. A greater active material Wh/kg means less material to purchase per kWh. This translates in a cost reduction if the material cost per kg does not increase when mAh/g and /or V increase. Moreover, this cost will be reduced thanks to the intelligent cell design, the process involved during cell manufacturing and the facilitated module and pack assembly with production pilot line unit.
EnergyVille is leader of the work package battery performance and safety assessment. EnergyVille is contributing to the development of behavioral and predictive models for battery performance and lifetime under various practical operating conditions. In addition EnergyVille is studying together with VITO the market acceptance of the new cell generations through life cycle and cost assessment.