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Fast ion dynamics in polymer electrolytes is facilitated by high amorphous content and is examined before going ahead for electrical properties. The X-ray diffraction (XRD) and differential scanning calorimetry (DSC) are techniques to estimate the degree of crystallinity (ΧC).

Figure 3.3 Strategies for improving the energy density of supercapacitors [Reproduced with permission from Ref. [13], © Springer Nature 2016].

It provides information about the crystalline and amorphous content in the polymer matrix. From XRD degree of crystallinity is evaluated from the area of crystalline (A_C) and amorphous peaks (A_A) using expression; . In DSC the melting enthalpy of crystalline host polymer (ΔH_m) and polymer matrix are used to evaluate the degree of crystallinity (Χ_C) via expression; .