Materials Engineering Seminar
Materials engineering professor Dr. Paul Fuierer will present the weekly seminar in the Department of Materials and Metallurgical Engineering. His talk is “Making Ceramics Great Again: Solid State Batteries by DAD.”
Noon Friday, Feb. 5, in Speare 113
Most all technologies, to some degree, rely on the invention, development and/or integration of advanced ceramics. Advanced batteries are no exception, whether the sodium-sulfur battery, ubiquitous lithium-ion battery (LIB), or the future all-solid-state-battery (ASSB). In fact, other than the lithium foil, the remainder of critical component parts of the ASSB cell (solid electrolyte, cathode, and current collector) are ceramic.
The solid state construction is expected to dramatically increase volumetric efficiency, energy density, lifetime and safety compared to state-of-the-art LIBs. Materials challenges for the ASSB include maximizing and controlling mixed ionic-electronic conductivity within the several components, interface stability and mechanical stability. The manufacturing challenges, as in any new energy technology, lie in cost and scaling to mass production. It is easy to imagine the manufacturing of ASSB beginning with solid state ceramic powder preparation, then suspension, layer forming (i.e. tape casting), lamination and compaction, and finally sintering. Though these are well-established ceramic fabrication steps, they have some inherent drawbacks with regard to the demands of the ASSB.
There exists a new and developing additive manufacturing (AM) technology that may be ideal for the building of ASSB cells called (Dry) Aerosol Deposition, or DAD. It is a kinetic spray process wherein ceramic particles are accelerated to high velocity, impact a substrate, and fracture into nanoparticles, which re-bond and densify with repeated impacts. The resulting full-density, nanostructure is expected to be ideal for battery component applications. DAD is scalable, and may prove to be economically viable. Fuierer will give some background on the topic of solid state batteries, and present some early DAD work done by his group with battery ceramics.