Table 3. Comparison of Membrane Characteristics between Present Work and Other Published PPO-Based Membranes.

sample designation	conductivity (× 10–2 S cm–1)	swelling at RT (%)	alkaline stability (% of initial conductivity)	power density (mW cm–2)	refs
QPPo/QSiO2-3	13.63 (80 °C) 7.03 (RT)	8.6	91.0 (1 M KOH, 1200 h, RT)	142 (60 °C, RH: 100%)	present work
PPO-ASU-30	7.43 (80 °C)	18.5	98.0 (1 M NaOH, 250 h, 80 °C)	90.2 (60 °C, RH: 100%)	(3)
PPO-DMP-30	7.05 (80 °C)	18.5	95.0 (1 M NaOH, 250 h, 80 °C)	124.7 (60 °C, RH: 100%)	(3)
ImPPO/IL-GO-0.5%	7.85 (80 °C)	28.5	70.0 (2 M KOH, 480 h, 80 °C)	136 (60 °C, RH: 100%)	(31)
PPO-10.8	10.76 (80 °C)		92.1 (1 M KOH, 500 h, 60 °C)	60 (60 °C, RH: 95%)	(29)
PPO/SiO2 (5.4%)	2.7(80 °C)			32 (50 °C, RH: 100%)	(47)
QAPPO-g-PS-31	1.46 (RT)	5.2	80.0 (1 M NaOH, 500 h, 80 °C)	64.4 (60 °C, RH: 100%)	(50)
m-QPPO-50	4.28 (20 °C)	30.0	85.0 (1 M NaOH, 200 h, 60 °C)	333 (60 °C, RH: 100%)	(26)
QAPPO/8% IL1–SiO2	3.2 (RT) 7.02 (80 °C)	30.0	92.9 (1 M KOH, 720 h, RT)	145.4 (60 °C, RH: 100%)	(51)
PPO-CE0.10-QA0.90	11.68 (80 °C)	19.5	95.0 (2 M KOH, 500 h, 80 °C)	350 (80 °C, RH: 100%)	(52)
BPPO/TEA-1% TiO2-30 ethyl-IL	5.14 (60 °C)	12.89	72.6 (6 M NaOH, 300 h, RT)		(53)