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The objectives of this work are to prepare and characterize poly[2,2′-m-(phenylene)-5,5′-bibenzimidazole]/graphene oxide (PBI/GO) solid electrolyte for direct alcohol alkaline fuel cell (DAAFC) applications. GO nanosheets are coated onto a PBI surface using a spin coater to construct the PBI/GO composite membrane. The PBI/GO composite membrane exhibits an ionic conductivity of 2.53 × 10−2 S cm−1 at...
Polybenzimidazole (PBI) films immersed in 2 M phosphoric acid (H3PO4) or 6 M potassium hydroxide (KOH) solution form electrolytes for conducting proton or hydroxide, respectively. A direct methanol fuel cell (DMFC) with the alkali-KOH doped PBI gives 117.9 mW cm−2 of power output which is more than 2 times greater than the power density of 46.5 mW cm−2 with the H3PO4-doped PBI (vs.) when both of the...
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