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You are here: Home Administration Chemistry & Biochemistry Department Events 2021 Spring semester Designing Electrode Architectures across Length Scales: Some Lessons Learned from Li-ion and “Beyond Li” Chemistries - Sarbajit Banerjee

Designing Electrode Architectures across Length Scales: Some Lessons Learned from Li-ion and “Beyond Li” Chemistries - Sarbajit Banerjee

When Mar 22, 2021
from 12:00 PM to 01:00 PM
Where via Zoom
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Abstract: The design and operation of rechargeable batteries is predicated on orchestrating flows of mass, charge, andenergy across multiple interfaces. Understanding such flows requires knowledge of atomistic and mesoscale diffusion pathways and the coupling of ion transport with electron conduction. Using multiple polymorphs of V2O5 as model systems, I will discuss our efforts to develop an Angstrom-level view of diffusion pathways using a combination of single-crystal X-ray diffraction and density functional theory calculations. Scanning transmission X-ray microscopy and ptychography imaging provides a means of mapping the accumulative results of atomic scale inhomogeneities at mesoscale dimensions and further enables tracing of stress gradients across individual particles. I will discuss mitigation of diffusion impediments with reference to two distinct approaches: (a) utilization of Riemann manifolds as a geometric design principle for electrode  architectures and (b) the atomistic design of polymorphs with well-defined diffusion pathways that provide frustrated coordination. The latter approach holds  opportunities for non-equilibrium structural motifs and distinctive chemical bonding and ultimately for the realization of novel function. Using binary, ternary, and quaternary oxides of vanadium, as illustrative examples I will highlight the tunability of electronic structure, the potential richness of energy landscapes, and the implications for discovering promising intercalation hosts for both multivalent and anion batteries.

 

Biography: Sarbajit Banerjee is the Davidson Chair Professor of Chemistry, Professor of Materials Science & Engineering, and Chancellor EDGES Fellow at Texas A&M University. Sarbajit obtained his Ph.D. at SUNY Stony Brook. He was a post-doctoral research scientist in Applied Physics and Applied Mathematics at Columbia University prior to starting his independent career at the University at Buffalo in 2007. He moved to Texas A&M University in 2014. He received an NSF CAREER award (2009); the ACS ExxonMobil Solid-State-Chemistry Fellowship (2010); the Cottrell Scholar Award (2011); the Minerals, Metals, and Materials Society Young Leader Award (2013); the ACS Journal of Physical Chemistry Lectureship (2013); the Scialog Innovation Fellowship (2013); the IOM3 Rosenhain Medal and Prize (2015); and the Royal Society of Chemistry/IOM3 Beilby Medal (2016). In 2012, MIT Technology Review named Sarbajit to its global list of “Top 35 innovators under the age of 35” for the discovery of dynamically switchable smart window technologies. He was awarded the 2018 Robert S. Hyer Graduate Student Mentor Award for by the Texas Section of the APS and the 2019 Undergraduate Research Mentoring Award by the College of Science at Texas A&M. He serves as Senior Editor of ACS Omega and is a Fellow of the Royal Society of Chemistry and the Institute of Physics. His research interests are focused on solid-state chemistry, electron correlated materials, mechanisms of electrochemical energy storage, heavy oil extraction and processing, and functional coatings. processing, and functional coatings.

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