Modification of Battery Separators via Electrospinning to Enable Lamination in Cell Assembly

To meet the requirements of today’s fast-growing Li-ion battery market, cell production depends on cheap, fast and reliable methods. Lamination electrodes separators can accelerate time-consuming stacking step in pouch assembly, reduce scrap rate enhance performance. However, few laminable are available market so far. This study introduces electrospinning as a well-suited technique to apply thin functional polymer layers common separator types, enabling lamination. The method is shown be particularly appropriate for temperature resistant ceramic separators, which stable interfaces between were formed capacity fading during 600 charging cycles was reduced by 44%. In addition, straightforward approach other types presented, including characterization, coating selection, mechanical tests intermediates electrochemical validation cells. concept successfully used modification polyethylene separator, novel fluoroelastomer applied. stability electrode/separator interface mass loading, lamination pressure, whereas poorly selected conditions may cause damage separator. Appropriate adhesion force 8.3 N/m could achieved using loading low 0.25 g/m2. case properties, polymer, morphology fibrous well adjusted each other, implementation allows faster, more flexible robust at comparable or better behaviour.