A high performance IT-EOG cell based on a solid/molten Bi2O3–B2O3 composite electrolyte

Abstract

New electrolytes with high oxygen ionic conductivity are required to realize efficient intermediate temperature electrochemical oxygen generators (IT-EOGs). The solid/molten Bi₂O₃–0.1 wt% B₂O₃ composite with an ionic conductivity of 2.2 S cm⁻¹ at 740 °C is a promising candidate for IT-EOG electrolytes. Here, we report the record oxygen production rate per unit power (31 cm³ min⁻¹ W⁻¹) of the Bi₃Ru₃O₁₁–40 wt% Bi_1.6Er_0.4O₃ electrode/Bi₂O₃–0.1 wt% B₂O₃ electrolyte/Bi₃Ru₃O₁₁–40 wt% Bi_1.6Er_0.4O₃ electrode IT-EOG cell, which is an order of magnitude higher than that of the IT-EOG cells based on state-of-the-art SDC, YSB, and DWSB ceramic electrolytes reported in the literature.