Table 2.

Comparison of proton conductivities of Nafion-based composite membranes and their PEMFC performance.

Membrane	Conductivity/Activation Energy	Temperature (°C)	RH (%)	Maximum Power Density in PEMFC	Ref.
Nafion/12 wt.%Phytic@MIL101	228 mS/cm and 15.14 kJ/mol	80	100	Not reported	[54]
Nafion/10 wt.% SAFHSS	100 mS/cm	100	100	Not reported	[45]
Nafion/4 wt.% GO	170 mS/cm and 12.98 kJ/mol	80	100	100 °C and RH = 25% 212 mW/cm2	[76]
Nafion/0.05 wt.%s-SWCNTs	15.5 mS/cm	100	100	65 °C 650 mW/cm2	[77]
Nafion/5 wt.% sPPSQ	157 mS/cm	120	100	Not reported	[46]
Recast Nafion/20 wt.% ZrSPP	50 mS/cm	110	98	100 °C 700 mA/cm2 @0.4 V *	[78]
Nafion/15 wt.% Analcime	437.3 mS/cm	80	100	Not reported	[79]
Nafion/1 wt.% ZIF-8@GO	280 mS/cm and 13.2 kJ/mol	120	40	Not reported	[66]
Nafion-0.6/UiO-66-NH2 + UiO-66-SO3H	256 mS/cm	90	95	Not reported	[80]
Nafion-0.6/GO@UiO-66-NH2	303 mS/cm	90	95	Not reported	[68]
Nafion/3 wt.% CPO-27(Mg)	11 mS/cm	50	99.9	50 °C and RH = 100%	[67]
				818 mW/cm2
				80 °C and RH = 100%
				591 mW/cm2
Nafion/1 wt.% SZM	2.96 mS/cm	80	35	80 °C and RH = 35%	[61]
				550 mA/cm2 @0.3 V
Nafion/1 wt.% F-GO	17 mS/cm	70	20	70 °C and RH = 20%	[81]
				300 mW/cm2
Nafion/3 wt.% Fe3O4-SGO	11.62 mS/cm and 21.41 kJ/mol	120	20	120 °C and RH = 25% 258.82 mW/cm2	[82]
Recast Nafion/14.3 wt.% SiO2-PWA	26.7 mS/cm and 11.2 kJ/mol	110	70	110 °C and RH = 70%	[70]
				540 mA/cm2 @0.4 V *
meso-Nafion/ 19 wt.% H3PW12O40	72 mS/cm	80	40	80 °C and RH = 50%	[83]
				541 mW/cm2

* Power density not reported, but we give the current density at the respective applied voltage.