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Balsara Lab

@BalsaraLab

Updates on lab news and research in polymer physics and lithium batteries
Berkeley, CA balsaralab.berkeley.edu Joined April 2016
207 Following 1K Followers 454 Posts

Latest posts 5

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Balsara Lab @BalsaraLab
thank you @advlightsource @BerkeleyLab for highlighting @Alec_Ho_ ‘s recent work on the shadow effect in electrodes under fast charging conditions! Check out the interview with Nitash: als.lbl.gov/3d-view-reveal…
als.lbl.gov 3D View Reveals Shadow Effect after Rapid Battery Charging Using 3D x-ray microtomography, researchers measured the lithiation levels of particles in Li-ion battery electrodes during charging. At faster charging rates, lithium metal accumulated on the...
Balsara Lab @BalsaraLab
In Neel’s final PhD paper, he used QENS to measure the solvation lifetime of a lithium ion in a polymer electrolyte. Chao Fang reproduced these results using MD to provide a direct measurement of solvation dynamics in an electrolyte!  #QENS #ORNL #LBL
nature.com/articles/s4156…
www.nature.com Nanosecond solvation dynamics in a polymer electrolyte for lithium batteries Nature Materials - Solvation dynamics at picosecond timescales critically affect charge transport in aqueous systems, but conflicting values have been reported for organic electrolytes. Lifetimes...
Balsara Lab @BalsaraLab
Another paper from Zach! He measured the Sand's time of polymer electrolytes and compared it to predictions from concentrated solution theory and found they match qualitatively. He also derived a general analytical expression for Sand's time
Link here:
iopscience.iop.org/article/10.114…
iopscience.iop.org Comparing Experimentally-Measured Sand’s Times with Concentrated Solution Theory Predictions in a... Comparing Experimentally-Measured Sand’s Times with Concentrated Solution Theory Predictions in a Polymer Electrolyte, Hoffman, Zach J., Mistry, Aashutosh, Srinivasan, Venkat, Balsara, Nitash P.
Balsara Lab @BalsaraLab
Cool paper out from Alec - using X-ray microtomography he measured the ionic current densities with high spatial resolution in a battery at rest. Important takeaway - even at rest there can be extremely large local current densities from lithium plating.
pubs.acs.org/doi/full/10.10…
pubs.acs.org Large Local Currents in a Lithium-Ion Battery during Rest after Fast Charging Abstract. Increasing electric vehicle (EV) adoption requires lithium-ion batteries that can be charged quickly and safely. Some EV batteries have caught on