Selective Oxygen Permeable Membrane for Real Lithium-Air Batteries

Zhouguang Lu 

Department of Materials Science & Engineering, Southern University of Science and Technology (SUSTech)

Abstract: One of the central issues for practical application of Li-air batteries was the contamination of moisture and CO2 from the air. A novel mixedmatrixmembrane (MMM) was prepared by incorporating polydopamine-coated metal organic framework (MOF) crystals of CAU-1-NH2 into a PMMA (polymethylmethacrylate) matrix (Fig. 1). The MMM demonstrated highly selective O2 permeability, high capability of carbon dioxide capture, and excellent hydrophobic behavior. These two favourable effects guaranteed the Li-air cell working very stable under ambient atmosphere with very high relative humid (30%) by repelling CO2 and moisture from the air. Evidently, the developed mixed matrix membrane based on CAU-1-NH2@PDA and PMMA polymer opens the way to develop novel air-permeable membrane for real Li-air batteries applied in ambient conditions rather than in pure oxygen (Li-O2) conditions.

Figure 1. The schematic illustration of the MMM based on CAU-1-NH2@PDA (PDA = polydopamine) and PMMA polymer for rebelling H2O and CO2 molecules. The Framework of CAU-1-NH2 viewed along c axis (f) and symbol: Al, pink; O, red; C, gray; H, blue.

Biography: Dr. Zhouguang Lu is currently Associate Professor in the Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), China. He obtained his BS and MS from the Central South University in 2001 and 2004, respectively, and PhD from City University of Hong Kong in 2009. He is the recipient of Fulbright Scholarship of USA Government in 2008-2009 and The Overseas High-Caliber Personnel (Level B) of Shenzhen Government in 2013. His research mainly covers the design and synthesis of nanostructures and their application in energy storage and conversion with focus on lithium/sodium ion batteries, and lithium-air batteries. He has authored for more than 100 peer-review journal papers with total citations of more than 3000 and h-index of 32.