Investigation of binder distribution in graphite anodes for lithium-ion batteries

Energy dispersive x-ray spectroscopy (EDS) is evaluated regarding its applicability for revealing the binder distribution in lithium-ion battery electrode films. Graphite anodes comprising carbon black and PVDF binder are subject to varying drying conditions during solvent removal in order to adjust different binder distributions; fluorine is used as a marker for the presence of PVDF. For electrodes of about 70 μm thickness the fluorine...