Effect of MXene on Oxygen Ion Conductivity of Sm0.2Ce0.8O1.9 as Electrolyte for Low Temperature SOFC

Low temperature solid oxide fuel cell (SOFC) has received great interest recently. However, the low oxygen ion conductivity of electrolyte restricts the operation temperature reduction for SOFC. In this report, 2D nanomaterial Ti3C2Tx is used as filler doped into the Smo.2Ceo.8O1.9 (SDC) to enhance the conductivity and mechanical strength of composite electrolyte. The 5wt.% Ti3C2Tx/SDC composite membrane exhibits the 3 and 9 times ionic conductivity as that of SDC at 5oo°C and 6oo°C, respectively. Furthermore, the peak power density of the single cell enhanced by ~250% at 500°C. The addition of Ti3C2Tx-MXene also improved the hardness, fracture toughness and thermal stability of composite membranes.