Table 1. Amount of Polymer, Li Salt, and Metal–Organic Framework Filler in the Various Composite Polymer Electrolytes.

sample	PEO (wt %)	MOF filler (wt %)	LiTFSI (wt %)
S1	95	5	0
S2	93	2	5
S3	85	5	5
S4	80	10	10
S5	75	15	10