TY - JOUR
T1 - Improving Electrodeposition of Mg through an Open Circuit Potential Hold
AU - Esbenshade, Jennifer L.
AU - Barile, Christopher J.
AU - Fister, Timothy T.
AU - Bassett, Kimberly L.
AU - Fenter, Paul
AU - Nuzzo, Ralph G
AU - Gewirth, Andrew A
N1 - Publisher Copyright:
© 2015 American Chemical Society.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015/10/15
Y1 - 2015/10/15
N2 - We used in situ X-ray diffraction, XPS, SEM, and electrochemical methods to interrogate the mechanism of Mg electrodeposition from PhMgCl/AlCl3 (APC) and EtMgCl electrolytes. An open circuit potential (OCP) pause following Mg deposition led to retained enhancement of Mg deposition and stripping kinetics along with lowered overpotentials for both. In situ X-ray diffraction demonstrated that the OCP pause led to a more polycrystalline deposit relative to that without the pause, while SEM presented micrographs that showed smaller deposits with an OCP hold. The improvement is attributed to an 'enhancement layer' that formed on the electrode during the OCP hold. Analysis of XPS data suggests that the 'enhancement layer' consists of Mg and Cl retained on the electrode surface, possibly following electrode depassivation.
AB - We used in situ X-ray diffraction, XPS, SEM, and electrochemical methods to interrogate the mechanism of Mg electrodeposition from PhMgCl/AlCl3 (APC) and EtMgCl electrolytes. An open circuit potential (OCP) pause following Mg deposition led to retained enhancement of Mg deposition and stripping kinetics along with lowered overpotentials for both. In situ X-ray diffraction demonstrated that the OCP pause led to a more polycrystalline deposit relative to that without the pause, while SEM presented micrographs that showed smaller deposits with an OCP hold. The improvement is attributed to an 'enhancement layer' that formed on the electrode during the OCP hold. Analysis of XPS data suggests that the 'enhancement layer' consists of Mg and Cl retained on the electrode surface, possibly following electrode depassivation.
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U2 - 10.1021/acs.jpcc.5b07825
DO - 10.1021/acs.jpcc.5b07825
M3 - Article
AN - SCOPUS:84944411451
VL - 119
SP - 23366
EP - 23372
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 41
ER -