Results

Anode carbon materials with fiber diameters of (126±43) nm (EFM126nm) and (858±107) nm (EFM848nm) and a porosity of 92% to 93% were fabricated by electrospinning of Polyacrylonitrile precursor in Dimethylacetamide with polymer concentrations of 6 wt% and 14 wt%, respectively. The fibers were collected on aluminium foil and peeled off prior to the carbonization with a maximum temperature of 1180 C. The fiber mats have a thickness of 133 µm (EFM126nm) and 165 µm (EFM848nm). For the fabrication of EFM848nm a custom hot-air assisted electrospinning technique was used. A hot-air jet is blown along the needle heating the polymer solution within the needle and leading to a lower viscosity of the polymer solution and faster a drying of the fibers. Both materials were tested in duplicates according to Kipf et al.(2013) under anoxic quasi-steady state conditions