A high performance O2 selective membrane based on CAU-1-NH2@polydopamine and the PMMA polymer for Li-air batteriesElectronic supplementary information (ESI) available. See DOI: 10.1039/c4cc09281c

A novel mixed matrix membrane (MMM) was prepared by incorporating polydopamine-coated metal organic framework (MOF) crystals of CAU-1-NH 2 into a PMMA (polymethylmethacrylate) matrix. The MMM possesses the advantages of high O 2 permeability, high capability of carbon dioxide capture, and excellent hydrophobic behavior. The MMM was assembled in the Li-air batteries which displayed promising electrochemical performance in the real ambient air with 30% relative humidity. A novel oxygen selective membrane was prepared and assembled in Li-air batteries operating under real air conditions with 30% RH. Due to its high O 2 permeability, remarkable CO 2 capture ability and excellent hydrophobic behavior, extremely stable cycling performance was achieved.