Direct Measure of Electrode Spatial Heterogeneity: Influence of Processing Conditions on Anode Architecture and Performance

Mary K. Burdette-Trofimov; Beth L. Armstrong; Johanna Nelson Weker; Alexander M. Rogers; Guang Yang; Ethan C. Self; Ryan R. Armstrong; Jagjit Nanda; Gabriel M. Veith

doi:10.1021/acsami.0c17019

Direct Measure of Electrode Spatial Heterogeneity: Influence of Processing Conditions on Anode Architecture and Performance

Mary K. Burdette-Trofimov, Beth L. Armstrong, Johanna Nelson Weker, Alexander M. Rogers, Guang Yang, Ethan C. Self, Ryan R. Armstrong, Jagjit Nanda, Gabriel M. Veith

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

In this work, the spatial (in)homogeneity of aqueous processed silicon electrodes using standard poly(acrylic acid)-based binders and slurry preparation conditions is demonstrated. X-ray nanotomography shows segregation of materials into submicron-thick layers depending on the mixing method and starting binder molecular weights. Using a dispersant, or in situ production of dispersant from the cleavage of the binder into smaller molecular weight species, increases the resulting lateral homogeneity while drastically decreasing the vertical homogeneity as a result of sedimentation and separation due to gravitational forces. This data explains some of the variability in the literature with respect to silicon electrode performance and demonstrates two potential ways to improve slurry-based electrode fabrications.

Original language	English
Pages (from-to)	55954-55970
Number of pages	17
Journal	ACS Applied Materials and Interfaces
Volume	12
Issue number	50
DOIs	https://doi.org/10.1021/acsami.0c17019
State	Published - Dec 16 2020

Funding

This work (M.K.B., B.L.A., A.R., G.Y., J.N., G.M.V.) was supported by the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy through the Vehicle Technology Office (Brian Cunningham Program Manager). The authors thank Michelle Kidder for performing BET analysis on the silicon nanopowder. Use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory (JNW), is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515. This manuscript has been authored by UT-Battelle, LLC, under Contract DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow other to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

Keywords

X-ray nanotomography
electrode architecture
poly(acrylic acid)-based binders
silicon electrodes
spatial homogeneity

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10.1021/acsami.0c17019

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Burdette-Trofimov, M. K., Armstrong, B. L., Nelson Weker, J., Rogers, A. M., Yang, G., Self, E. C., Armstrong, R. R., Nanda, J., & Veith, G. M. (2020). Direct Measure of Electrode Spatial Heterogeneity: Influence of Processing Conditions on Anode Architecture and Performance. ACS Applied Materials and Interfaces, 12(50), 55954-55970. https://doi.org/10.1021/acsami.0c17019

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Direct Measure of Electrode Spatial Heterogeneity: Influence of Processing Conditions on Anode Architecture and Performance

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