8/15/2023 0 Comments Radiant energy wixomNavitas worked with a microwave processing company Lambda Technologies to resolve these barriers through the use of variable frequency microwaves (VFM). Electrode drying, however, introduces two barriers to use of microwave energy: avoiding arcing with the presence of metal foil current collectors, and supporting roll-to-roll coating without leakage of the microwave field through the coating web entry and exit ports. Microwave energy is also uniformly deposited through the bulk of the coated electrode. Microwaves efficiently transfer energy through selective absorption by polar solvent (e.g. Microwave drying introduces key advantages over radiant and convective cooling for electrode drying (figure 1). The expected impact of this technology will be >20% improvement in the cell level Wh/kg and 8% reduction in the system level EV battery cost. The technology will enable cathodes that can match emerging high capacity silicon alloy anode materials. The technology is drop-in compatible with capital equipment in operation at battery OEM plants. This technology can improve electrode loading by at least 50% and accelerate coating rates by >2X. Navitas ASG with Lambda Technologies has recently demonstrated and scaled up a patent-pending advanced drying process (ADP) technology that breaks through the limitations on electrode thickness and drying rate that are inherent in the present coating technology. The electrode coating operation presents the highest leverage opportunity to address both challenges. The commercial success of lithium ion batteries hinges on significant improvements in both cost and energy density.
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