Figure 4

(a,b) Two dimensional (2D) XRD image of LIBs, (c) XRD of trilayer separator (PP/PE/PP) and its monolayer (PP and PE) and (d) the evolution of PP (040) on d-spacing respect to capacity with three different current density of 2.51, 1.27 and 0.75 mA cm⁻² g⁻¹. Data points were linear fitted as the dash lines.