Moreover, the cycle stability of PN and its composites was investigated at a scan rate of 30 mV s -1 for 4000 consecutive CV cycles within the potential range of 0 to 1.1 V. As illustrated in Figure , all four polymers exhibit a linear decrease in capacitance retention over the entire cycling duration. PN and PNZ demonstrate comparable and relatively low cycle stability, dropping below 70% capacitance retention after 4000 cycles. Similarly, PNF follows a comparable trend with a capacitance retention of approximately 80% over the cycling experiment. Notably, the highest capacitance retention is observed for PNFZ, reaching 90% throughout the entire testing period. The linear decrease in capacitance retention suggests the presence of a consistent degradation mechanism persisting throughout the cycle test, with no additional processes occurring in the later stages that alter the rate of performance loss.