Impact of Anions and Water Content on [Li-Al] Layered Double-Hydroxide Stability

Christopher Hoban, Natalie Parkinson, K. Jayanthi, M. Parans Paranthaman, Alexandra Navrotsky, Brian F. Woodfield

Research output: Contribution to journalArticlepeer-review

Abstract

[Li-Al] layered double hydroxides (LDHs) are compounds with potential as sorbents for lithium extraction from brine solutions. In this work, heat capacities were measured from approximately 2.5 to 300 K for six [Li-Al] LDHs with differing anions (Cl-, OH-, and SO42-) and water content (denoted A for air-dried and O for oven-dried). These measurements were used to calculate the standard entropy at 298.15 K, and the results were combined with previously performed enthalpy measurements to calculate Gibbs energies of formation from the binary compounds. The calculated order of stability based on Gibbs energies of formation was Cl-LDH-O > OH-LDH-O > Cl-LDH-A > SO4-LDH-O > SO4-LDH-A > OH-LDH-A. Results support previous findings that higher water content generally raises the Gibbs energy of the LDH.

Original languageEnglish
Pages (from-to)793-800
Number of pages8
JournalJournal of Physical Chemistry C
Volume129
Issue number1
DOIs
StatePublished - Jan 9 2025

Funding

This work was supported by the US Department of Energy Critical Materials Institute (CMI) Hub under the Subaward Number DE-AC02-07CH11358. This manuscript has been authored by UT-Battelle, LLC under Contract no. DEAC05-00OR22725 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 others 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 ).

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