New paper from us at ACS Applied Energy Materials (open access). We modeled the localized charging and discharging (i.e. balancing) that happens in a battery after a high current pulse. Great work by Dominick Guida in collaboration with Energizer.
I *wanted* this paper to be about adapting Marcus-type kinetics to MnO2 electrochemistry. But no matter what we tried, adapting a Butler-Volmer expression fit the data better. (AMH=asymmetric Marcus–Hush kinetics.)
Undergrad researchers Jamie and Andrew, with their mentor Ben.
We have a new paper out today on polymer-based all-solid-state batteries, focused on the catholyte. We find that when using PVDF, 10% catholyte is a starved condition. But if you replace a little bit of the PVDF with PEO it helps the interface a lot.
We also find that loading up on catholyte has ~some benefits, but also causes the catholyte to agglomerate and hinder transport.
Graduation ceremony for Dr. Ben Howell and Dr. Alyssa Stavola today!
A new paper led by Alyssa Stavola is out today. We study NMC cathodes with an argyrodite sulfide electrolyte. We find *kinetics* are ~13% of the same NMC with a liquid electrolyte, which we attribute to inactive NMC surface area.
We also use micro-XANES and XRF (shown above) to detect reduced Co2+ at the surface of the NMC. The bulk NMC is Co3+. This indicates CoS or Co3S4 at the interface.