AM Batteries
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Solvent-Free, Dry-Electrode Manufacturing for Batteries: Our Investment in AM Batteries
Electrode fabrication is the first stage in battery manufacturing, and the conventional process is lengthy and costly. It involves a “wet coating” that most commonly includes N-Methyl-2-pyrrolidone (NMP) as a solvent, followed by drying and compression. The drying process requires a large physical footprint — the equivalent size of a football field — and NMP is inherently toxic, so recovery is required. Both the drying and recovery processes require high operating temperatures and result in high energy consumption and operating costs, equivalent to approximately 32% of the total cost of battery manufacturing and 50% of the energy consumption.
AM Batteries’ process does not require energy-consuming evaporation or solvent-recovery. AM Batteries’ dry-electrode manufacturing technology uses an electrostatic spray deposition technique: active materials (cathode/anode) are electrostatically charged, deposited onto metal foil current collectors, and then processed to their final state. AM Batteries has found that this dry process results in 1) a 40% reduction in capital required for electrode equipment investment; 2) a 50% reduction in electricity usage of the plant; and 3) reduced cell cost. In addition, AM Batteries’ electrodes also offer the potential for fast-charging and higher-energy density batteries.