Concentration and velocity profiles in a polymeric lithium-ion battery electrolyte

Steinrueck HG, Takacs CJ, Kim HK, Mackanic DG, Holladay B, Cao C, Narayanan S, Dufresne EM, Chushkin Y, Ruta B, Zontone F, Will J, Borodin O, Sinha SK, Srinivasan V, Toney MF (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Energy and Environmental Science Royal Society of Chemistry

DOI: 10.1039/D0EE02193H

Abstract

Predictive knowledge of ion transport in electrolytes which bridges microscopic and macroscopic length scales is imperative to design new ion conductors and to simulate device performance. Here, we employed a novel approach combining operando X-ray photon correlation spectroscopy, X-ray absorption microscopy, continuum modelling, and molecular dynamics simulations to probe the ion transport in a baseline polymeric lithium-ion battery electrolyte. In a Li/PEO–LiTFSI/Li symmetric cell under polarization, we determined and rationalized microscopic properties including local electrolyte velocities and ion correlations and connected this insight to measured and simulated macroscopic ion concentration gradients. By relating our results across length scales, we suggest a fairly concentration-independent transference number of about 0.2. Our study shows the broad applicability of operando X-ray photon correlation spectroscopy to the understanding of dynamic phenomena.

Authors with CRIS profile

Johannes Will Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Additional Organisation(s)

Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM) Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Involved external institutions

Argonne National Laboratory US United States (USA) (US) Stanford National Accelerator Laboratory (SLAC) US United States (USA) (US) University of California, San Diego US United States (USA) (US) United States Army Research Laboratory (ARL) US United States (USA) (US) Université Claude Bernard Lyon 1 (UCB) FR France (FR) European Synchrotron Radiation Facility (ESRF) FR France (FR)

How to cite

APA:

Steinrueck, H.-G., Takacs, C.J., Kim, H.-K., Mackanic, D.G., Holladay, B., Cao, C.,... Toney, M.F. (2020). Concentration and velocity profiles in a polymeric lithium-ion battery electrolyte. Energy and Environmental Science. https://dx.doi.org/10.1039/D0EE02193H

MLA:

Steinrueck, Hans-Georg, et al. "Concentration and velocity profiles in a polymeric lithium-ion battery electrolyte." Energy and Environmental Science (2020).

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