Abstract
AbstractElectrophoretic deposition (EPD) is a proven coating operation at an industrial scale. Initially designed for the automotive industry, it has expanded to other applications, notably ceramic coatings for surface protection, and has found promising application in the battery industry. Whilst fundamental half‐cell studies of EPD electrodes are numerous, their practical performance at full‐cell level is largely unknown. This study reports full‐cell lithium‐ion batteries in which anode and cathode are manufactured by EPD, using an exemplary Li4Ti5O12/LiFePO4 (LTO/LFP) chemistry. Investigations compatible with industry scalability were carried out including a) formulation of colloidal electrolytes for large area electrode manufacture, b) optimisation of EPD parameters providing high coating thickness and mass loading, c) comparison with slurry cast electrodes, d) scaling investigations to prototype large area pouch cells, and e) ease of manufacture with porous current collectors for high power applications. It was found that the practical performance of EPD electrodes outperformed slurry casting in various categories including lower resistances, more extractable capacity, higher power capability and stable cycling robustness.
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