Modeling Isotope Separation in Electrochemical Lithium Deposition

Wild, Joseph; Wang, Peiyu; Jin, Tianwei; Yang, Yuan

doi:10.1149/1945-7111/ac5854

Modeling Isotope Separation in Electrochemical Lithium Deposition

Journal Article · Wed Mar 09 00:00:00 EST 2022 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1945-7111/ac5854· OSTI ID:1865242

Wild, Joseph ^[1]; Wang, Peiyu ^[2]; Jin, Tianwei ^[2]; ^[2]

Columbia Univ., New York, NY (United States); Columbia University
Columbia Univ., New York, NY (United States)

Naturally occurring Li consists of two stable isotopes, ⁶Li with an abundance of about 7.5%, and ⁷Li making up the remainder with 92.5%. The development of a ⁶Li enrichment technique, in terms of technical reliability and environmental safety to reach ⁶Li future requirements, represents a key step in the roadmap for nuclear fusion energy supply worldwide. This paper uses finite element analysis-based models to simulate electrochemical Li isotope separation, which is an attractive method in terms of simplicity, safety, and scalability. In the model, we quantitatively analyze how different electrochemical factors including thermodynamics, charge-transfer kinetics, and diffusivities affect the separation process (separation factor), together with cell parameters, such as cell length and current density. The maximum separation factor of 1.128 could be obtained with the cell under the optimal thermodynamic, kinetic, and diffusive conditions, which is among the highest separation factors ever reported. Furthermore, these results will assist in designing the actual isotope separation setup with large separation factor and appropriate timing for sample collection.

View Accepted Manuscript (DOE)

Research Organization:: Columbia Univ., New York, NY (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0022256

OSTI ID:: 1865242

Journal Information:: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 3 Vol. 169; ISSN 0013-4651

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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