Performance of solid state protonic battery with different cathodes

To establish the fact that the performance of a solid state battery is predominantly governed by the cathode, primary electrochemical cells were fabricated using FeH(SO4)(2)-xH(2)O solid electrolyte having proton transport number close to unity (prepared by chemical route) taken in conjunction with five different cathodes MnO2 PbO2 V6O13, I-2, and TMAI iodine complex. Amongst these, better discharge characteristics along with thermodynamic and chemical stability of the cell were offered by TMAI iodine complex based cathode. Beside these, it provided short-circuit current, capacity and energy density of the order of 5 mA 4.5 mAh and 2.67 Wh/kg respectively due to the presence of highly active iodine, which is not free in TMAI compared to the cathode made of Simply I-2.