Figure 4From: Polystyrene-Al2O3 composite solid polymer electrolyte for lithium secondary batterySEM images of PS-based composite SPEs. PS-based composite SPEs with (a) 5 wt.%, (b) 10 wt.%, (c) 15 wt.%, and (d) 20 wt.% Al2O3 contents at a magnification of ×300.Back to article page