Electrical, thermal and mechanical studies were carried out on proton conducting electrolytes, based on poly(vinylpyrrolidone)(PVP) with ammonium perchlorate ($NH_4ClO_4$). Considering both the conductivity and manageability of films, the optimal PVP and $NH_4ClO_4$ weight ratio was 7:3 with 15 wt% water, exhibiting a protonic conductivity of $0.91{ imes}10^{-44};Scm^{-1}$ at $30^{circ}C$ and $1.12{ imes}10^{-2};Scm^{-1}$ at $80^{circ}C$. Thermal studies showed that the crystallites of excess $NH_4ClO_4$ were formed inside the electrolyte, but they were decreased significantly with increasing water content. Cellulose was mixed to improve the mechanical strength of the hydrated samples. In a reinforced matrix of PVP/Cellulose complexes, the water retention property was improved significantly, thus exhibiting a slower decrease in conductivity over time.