ECS Special Seminar: Jennifer Rupp, MIT

Wednesday, May 9, 2018
2:00 p.m.-3:00 p.m.
Kay Boardrooms, Kim Engineering
Catherine Stephens
301 405 9378
csteph5@umd.edu

Lithionics: Store Energy, Compute Data and Chemically Sense Environment based on Lithium

Jennifer L.M. Rupp

Massachusettes Institute of Technology MIT, Cambridge 02139, USA
jrupp@mit.edu

Next generation of energy storage and sensors may largely benefit from fast Li+ ceramic electrolyte conductors to allow for safe and efficient batteries and real-time monitoring anthropogenic CO2. Recently, Li-solid state conductors based on Li-garnet structures received attention due to their fast transfer properties and safe operation over a wide temperature range. Through this presentation basic theory and history of Li-garnets will first be introduced and critically reflected towards new device opportunities demonstrating that these electrolytes may be the start of an era to not only store energy or sense the environment but also to emulate data and information based on simple electrochemistry device architecture twists.

In the first part we focus on the fundamental investigation of the electro-chemo-mechanic characteristics and design of disordered to crystallizing Li-garnet structure types and their description. Understanding the fundamental transport in solid state and asking the provokative question: how do Li-amorphous to crystalline structures conduct? As well, as how can we alter their charge-and mass transport properties for solid electrolytes and towards electrodes is discussed. Here, we firstly present new Li-garnet battery architectures for which we discuss lithium titanate and antimony electrodes in their making, electrochemistry and assembly to full battery architectures1-4. Secondly, new insights on degree of glassy to crystalline Li-garnet thin films are presented based on model experiments of the structure types. Here, the thermodynamic stability range of maximum Li-conduction, phase, nucleation and growth of nanostructure is discussed using high resolution TEM studies, near order Raman investigations on the Li-bands and electrochemical transport measurements. The insights provide novel aspects of material structure designs for both the Li-garnet structures (bulk to films) and their interfaces to electrodes, which we either functionalize to store energy for next generation solid state batteries or ... make new applications such as Li-operated CO2 sensor tracker chips. As a final part we review in a more holistic picture how one can use such materials and change the electrochemistry from energy storage, chemical sensing to data emulation for which we see prospect for electric vehicles, the Internet of Things or hardware in artificial intelligence.

 

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Jennifer Rupp is the Thomas Lord Assistant Professor of Materials Science and Engineering and Assistant Professor of Electrical Engineering and Computer Science at MIT. Before she came to MIT, Prof. Rupp was a non-tenure-track assistant professor at ETH Zurich Switzerland where she held two prestigious, externally-funded career grants: an ERC Starting Grant (SNSF) and a Swiss National Science Foundation (SNF) professorship from 2012 on.

She has published more than 70 papers, holds 4 patents, and enjoys actively discussing material tech trends on the theme of energy with the public, economists and policy makers. She is a frequent speaker and member of the World Economic Forum (2015-2017), and contirbutes to CNN and other television programs.
 

Audience: Campus 

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