LPS and LLZO inorganic solid electrolytes have been the workhorse of solid battery efforts for the past 20 years. LPS (or sulfur based) solid electrolytes have a lithium ion conductivity higher than liquid electrolytes and are softer and easier to process into separators than LLZO. However, their electrochemical stability is quite narrow on the anode as well as on the cathode side which require protective coatings for compatibility. One common method to interface high conductivity LPS with metallic lithium anode is to use a PEO polymer interface between the reactive lithium anode and the LPS solid electrolyte separator. In this podcast i discuss the stability of LPS with the PEO membrane.
Claudiu B. Bucur obtained his Ph.D. in 2008 from Florida State University under the mentorship of distinguished Leo Mandelkern Professor of Polymer Science, Joseph B. Schlenoff. He studied the manner in which polyelectrolyte multilayers assemble, and how doping them with ions changes their mechanical and thermodynamic properties. In 2010 he completed his postdoctoral studies at the USDA Agricultural Research Service Labs, where he investigated corrosion inhibition via biomembranes. Dr. Bucur then joined the Post Lithium Ion Research Group at the Toyota Research Institute of North America, where he focused on metallic anodes such as magnesium, lithium, sodium, and their electrolytes as well as high capacity conversion cathodes such as the sulfur cathode. He expanded upon his experience with polymers, corrosion, and interfaces and was able to advance many areas in the battery field. Currently, Dr. Bucur is Chief Engineer for new battery and solid electrolyte projects at Great Wall Motor, the largest SUV manufacturer in China. He is fascinated by energy storage and dreams of creating the ultimate battery.
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