Proton selective ionic graphene-based membrane for high concentration direct methanol fuel cells

Novel bilayer well-aligned Nafion/graphene oxide composite membranes prepared using spin coating method for direct liquid fuel cells

“…The NaCl solution was then titrated with 0.005 M NaOH solution to an end point with phenolphthalein as the indicator. The IEC (Q, in mmol g À 1 ) was calculated from the mass of the dry membrane (W dry ), the titrated NaOH volume (V base ), and the concentration of the NaOH (C base ) [14,21].…”

“…In addition, GO is a potential filler to block the passage of fuel through the membrane electrolyte. Nair et al and Paneri et al proved that a pure GO membrane can significantly block the ethanol and methanol permeation [20,21] while permitting water vapor diffusion [20]. Lin and Lu demonstrated that the methanol permeability of hot-pressed GO on Nafion membrane was 41% lower than pristine Nafion 115 [17] and such Nafion/GO membrane showed a higher peak power density (55 vs. 38 mW cm -2 with a 6 M methanol feed at 50°C) than Nafion in a direct methanol fuel cell (DMFC).…”

Orderly sandwich-shaped graphene oxide/Nafion composite membranes for direct methanol fuel cells

“…Paneri et al [14] reported the methanol permeability of a GO-based membrane to be 1.6 × 10 -6 and 1.8 × 10 -6 cm 2 s -1 in 1 and 5 M methanol solutions, respectively. The GO-laminated Nafion membrane exhibited a methanol permeability of 9.28 × 10 -7 19 cm 2 s -1 in a 3 wt% methanol solution at 35°C, as noted by Lin et al [15].…”

“…A pure GO-based membrane was prepared through vacuum filtration and lamination and compared with Nafion, as noted by Paneri et al [14]. Although the methanol permeability can be 3.2 × 10 -8 cm 2 s -1 , the lack of mechanical stability is an obstructive factor for further development.…”

Highly methanol resistant and selective ternary blend membrane composed of sulfonated PVdF‐co‐HFP, sulfonated polyaniline and nafion

“…A variety of such alternative membrane materials have been reported over the years by investigators, including the authors of this work . For example, Zhang et al .…”