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Hard Materials Seminar - “Lithionics” On the design of lithium oxides for solid state batteries and novel neuromorphic computing functions”

Event Type
Seminar/Symposium
Sponsor
Materials Science and Engineering Department
Date
Mar 11, 2021   4:00 pm  
Speaker
Jennifer Rupp, Depts. of Materials Science and Engineering, Electrical, and Computer Science, MIT
Views
26
Originating Calendar
MatSE Hard Materials Seminar Calendar

“Lithionics” On the design of lithium oxides for solid state batteries and novel neuromorphic computing functions”

Next generation of energy storage may largely benefit from fast Li+ ceramic electrolyte conductors to allow for safe and efficient batteries. With recent discoveries in thin film processing solid-state lithium ion conductors, such as Li-garnets and LIPON or LiSICON-based solids, have been recently considered as candidate materials not only for next-generation solid-state batteries but also for neuromorphic computing via memristors owing to the fast ionic transport in the solid-state electrolyte.

In the first part of this talk, we review current needs and challenges in the field of solid-state batteries. We underline the advantages of various Li solid-state conductor materials and reflect on opportunities of thin film processing, being a requirement to define precisely the Lithium stoichiometries and related electronic state changes for transition metal ions, miniaturize the device, and reach high energy/information densities for energy storage, computation, and sensing.

In the second part, we focus on Li-film processing and controlling Lithium stoichiometries to reach fast conductive phases for Li garnets and Li titanates as solid state battery components, and memristive neuromorphic computing units. Insights on structure-phase-transport interaction and implications on performances will be exemplified for energy storage aiming high energy densities, and modulations of synaptic artificial weights through lithium induced metal-to-insulator transitions in lithium titanate memristors.

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