Solid polymer Electrolytes plays important role in the working of fuel cell. Proton conducting electrolyte synthesized using different composition of polyvinyl alcohol and ammonium acetate such as 80:20, and 87.5:12.5 by solution cast technique. Different characterization were carried out such as, Micro-hardness testing, Forier transformation I-R spectrometry(FTIR) Thermogravimetric analysis (TGA), Differential scanning Calorimetry (DSC), These complexes found thermal stability of up to 2000C
