Cycling demonstration of Sequential Deposition Synthesis-synthesized lithium garnet films in full batteries
HINRICHER J. 1, KIM C. 2, LEE H. 3, MIARA L. 2, HOOD Z. 1, MAURANO A. 2, CHANG W. 3, CHO J. 2, RUPP J. 1,4
1 Massachusetts Institute of Technology, Cambridge, United States; 2 Samsung Research America, Cambridge, United States; 3 Samsung Advanced Institute of Technology, Seoul, Korea (Republic of); 4 Technical University of Munich, Munich, Germany
Sequential deposition synthesis (SDS) is a recently-discovered technique that allows a solid-state electrolyte layer to be fabricated directly from a liquid precursor which is then atomized onto a heated substrate where the solvent evaporates and the precursor salts decompose to form a conformal layer. Li7La3Zr2O12 (LLZO) is a promising material that has seen much interest in the battery field but has challenges to synthesize this layer between 5-15 µm thick which SDS is capable of fabricating. LLZO films were fabricated directly onto a porous substrate that was infiltrated with a polymer gel electrolyte and the cycling performance was demonstrated in a full cell using Li metal anode and lithium cobalt oxide (LCO) cathode. The cycling performance is discussed in reference to state-of-the-art performance in the battery field and post-mortem analysis on the cells is performed to elucidate failure mechanisms.