Solid Electrolyte Interphase Formation on Anatase TiO2 Nanoparticle-Based Electrodes for Sodium-Ion Batteries

Siebert A, Dou X, Garcia-Diez R, Buchholz D, Félix R, Handick E, Wilks RG, Passerini S, Bär M (2024)

Publication Type: Journal article

Publication year: 2024

Journal

ACS Applied Energy Materials American Chemical Society

Book Volume: 7

Pages Range: 125-132

Journal Issue: 1

DOI: 10.1021/acsaem.3c02304

Abstract

Carbon-coated anatase TiO2 nanoparticles are a promising anode material for sodium-ion batteries, theoretically providing a satisfactory capacity combined with a relatively low cost, environmental friendliness, and high-rate capability. Nondestructive, depth-resolved hard X-ray photoelectron spectroscopy (HAXPES) is exploited to reveal the composition profile of the solid electrolyte interphase (SEI) that forms during the first sodiation (discharge) cycle and that has been determined to be (on average) 6 nm thick. Sodium chloride (NaCl), sodium fluoride (NaF), sodium carbonate (Na2CO3), sodium alkyl carbonates (NaCO3-R), poly(ethylene oxide) (PEO), sodium hydroxide (NaOH), sodium ions, and hydrocarbons have been identified as the major species within the SEI, with a higher hydrocarbon concentration near the SEI/electrode interface and a higher sodium-ion concentration at the SEI surface. These findings give detailed insights into the complex interplay taking place at the electrolyte/TiO2 nanoparticle interface during the sodiation/desodiation (discharging/charging) processes, paving the way for a deliberate optimization.

Authors with CRIS profile

Marcus Bär

Involved external institutions

Helmholtz Institut Ulm DE Germany (DE) Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) DE Germany (DE)

How to cite

APA:

Siebert, A., Dou, X., Garcia-Diez, R., Buchholz, D., Félix, R., Handick, E.,... Bär, M. (2024). Solid Electrolyte Interphase Formation on Anatase TiO2 Nanoparticle-Based Electrodes for Sodium-Ion Batteries. ACS Applied Energy Materials, 7(1), 125-132. https://dx.doi.org/10.1021/acsaem.3c02304

MLA:

Siebert, Andreas, et al. "Solid Electrolyte Interphase Formation on Anatase TiO2 Nanoparticle-Based Electrodes for Sodium-Ion Batteries." ACS Applied Energy Materials 7.1 (2024): 125-132.

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