Li1.2Zr1.9Sr0.1(PO4)3 as a Solid-State Electrolyte

Thursday, 5 October 2017: 09:20
Maryland A (Gaylord National Resort and Convention Center)
J. Wolfenstine, J. L. Allen (U.S. Army Research Laboratory), J. Sakamoto, and T. Thompson (University of Michigan)
In recent years there has been a resurgence in the use of Li metal as an anode, because such use can to lead to rechargeable batteries with higher energy than currently exist. Using a Li anode with a liquid electrolyte can lead to dendrite shorting and flammability issues. To overcome these problems Li-ion conducting solid electrolytes are attracting considerable attention. The major requirements for the solid Li-ion conducting electrolyte are: high Li-ion conductivity, low electronic conductivity, high relative density, chemical/electrochemical stability with the Li anode and cathodes, adequate mechanical properties. One possible electrolyte under consideration based on the NaSCION structure is Li1.2Zr1.9Sr0.1(PO4)3. It is the purpose of this presentation to discuss the following: 1] ionic/electronic conductivity 2] elastic modulus/hardness/fracture toughness and 3] Li /water stability of dense (~97%) fine-grain (~10 mm) Li1.2Zr1.9Sr0.1(PO4)3 consolidated by reactive hot-pressing. The results will compared to other Li-ion solid-state electrolyte conductors based on the NaSICON, perovskite and garnet structures.