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Advanced design of a X-ray Absorption Spectroscopy setup for measuring transition metals speciation in molten carbonates, hydroxides and hydrogenosulfates

Abstract : Battery recycling is currently becoming a crucial issue. One possible treatment path involves the use of molten salts. Mechanistic understanding of the underlying processes requires being able to analyze in-situ speciation in the molten salts at various temperatures. This can be advantageously achieved using X-ray absorption spectroscopy, the use of Quick-EXAFS facilities being particularly appropriate. Consequently, this paper presents the design and development of a new setup allowing to carry out Quick-EXAFS experiments in molten oxidizing salts at high temperature. We describe the different components of the cell and the performances of the heating device. We illustrate the capabilities of the setup by analyzing the temperature evolution of Co speciation upon dissolution of LiCoO 2 , a typical battery electrode material, in molten carbonates, hydroxides and hydrogenosulphates.
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https://hal-cnrs.archives-ouvertes.fr/hal-03774823
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Submitted on : Monday, September 12, 2022 - 9:46:11 AM
Last modification on : Tuesday, September 27, 2022 - 4:28:50 AM

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Z. Safarzadeh, J. Gomes, J. Sirieix-Plénet, N. Ruiz, L. Hamitouche, et al.. Advanced design of a X-ray Absorption Spectroscopy setup for measuring transition metals speciation in molten carbonates, hydroxides and hydrogenosulfates. Review of Scientific Instruments, American Institute of Physics, 2022, 93 (7), pp.075102. ⟨10.1063/5.0087698⟩. ⟨hal-03774823⟩

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