01865nas a2200181   4500008004100000022001500041245010000056210006900156260000800225300001200233490000800245520120500253100002701458700002701485700002401512700002201536856012501558       2018                        eng d  a 0376-738800aPreparation and investigations of ABPBI membrane for HT-PEMFC by immersion precipitation method0 aPreparation and investigations of ABPBI membrane for HTPEMFC by   cOCT  a211-2170 v5643 aPoly(2,5-benzimidazole) (ABPBI) membranes were prepared by an easy and benign 'immersion precipitation' method; alleviating drawbacks of conventional solution casting method involving evaporation of the corrosive solvent. The importance of varying inherent viscosity on the properties of resulting membranes was investigated. The porous membranes formed by immersion precipitation method were analyzed for basic properties (water flux, porosity and dimensional analysis). Since the dense structure is required for their applicability for a fuel cell, through-porosity of the formed membranes was successfully eliminated using a unique shrinkage (similar to 50%) property of ABPBI, initially, at 60 degrees C followed by at higher temperature. The correlation of membranes annealing temperature with the mechanical properties, phosphoric acid doping and proton conductivity was established. The present membranes exhibited high doping level (5.1 mol/RU), proton conductivity (0.083 S cm(-1)) and fuel cell performance. For comparison, solution casted membranes were prepared and analyzed. The OCP (0.91 V) and max power density (766mWcm(-2)) are quite promising features of this new type of membranes.1 aChaudhari, Harshal, D.1 aIllathvalappil, Rajith1 aKurungot, Sreekumar1 aKharul, Ulhas, K.  uhttps://library.ncl.res.in/content/preparation-and-investigations-abpbi-membrane-ht-pemfc-immersion-precipitation-method