Copper oxide - perovskite mixed matrix membranes delivering very high oxygen fluxes

• BSCC mixed matrix membranes containing copper oxide and perovskite phase.
• Exceptionally high O2 fluxes reaching 27.5 ml cm−2 min−1 at 950 °C.
• O2 permeance was 86 times higher above 18 kPa than best perovskite membrane.
• A key feature of BSCC is an intergranular network of an amorphous copper rich phase.