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Al(PF6)3_UCR_ChemRxiv.pdf (2.93 MB)
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Synthesis and Electrochemical Properties of an Aluminum Hexafluorophosphate Electrolyte

preprint
submitted on 01.05.2020 and posted on 05.05.2020 by Xiaoyu Wen, Jian Zhang, Hewei Luo, Charlene Tsay, Huanhuan Jiang, Ying-Hsuan Lin, Juchen Guo
We report the first synthesis of aluminum hexafluorophosphate (Al(PF6)3) and its electrochemical properties in dimethyl sulfoxide (DMSO). The single crystal structure of the synthesized Al(PF6)3 is revealed as Al(PF6)3·(DMSO)6, and 0.25 M Al(PF6)3 in DMSO with high ionic conductivity is obtained. With characterizations including nuclear magnetic resonance spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy, we demonstrate the reversibility of Al deposition-stripping in the electrolyte, which can be improved by triethylaluminium as the electrolyte additive. Finally, the side reaction involving DMSO decomposition to form aluminum oxide during Al deposition is identified by gas chromatography/electron ionization-mass spectrometry.

Funding

NSF, CBET-1751929

History

Email Address of Submitting Author

jguo@engr.ucr.edu

Institution

University of California, Riverside

Country

United States

ORCID For Submitting Author

0000-0001-9829-1202

Declaration of Conflict of Interest

No conflict of interest

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