Lithium deposition on polycrystalline silver. A comparison between electrochemical and gas-phase environments

Lin Feng Li, Dana A. Totir, Yosef Gofer, Kuilong Wang, Gary S. Chottiner, Daniel Alberto Scherson

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The electrochemical properties of clean and oxygen-contaminated polycrystalline Ag surfaces have been examined in LiClO4/polyethylene oxide solutions in ultrahigh vacuum (UHV) environments at temperatures in the range 323-333 K. Unlike the behavior observed for Au and Ni under the same experimental conditions, no clearly defined voltammetric peaks were found during the first and subsequent cycles in the range 2.20-0.25 V vs. Li/Li+ initiated at the open-circuit potential, 1.75 V vs. Li/Li+. Instead, the scans in the negative direction were characterized by two adjoining regions in which the current increased linearly with potential, albeit at different rates, and the subsequent scans in the positive direction yielded comparatively much smaller currents largely independent of the applied potential. Integration of the voltammetric curves over the potential range 0.25<E<2.20 V vs. Li/Li+ revealed a pronounced imbalance between the charges obtained in the scans in the negative (Q-) and positive (Q+) directions. This phenomenon was attributed, by and large, to the high rates of Li dissolution into Ag at these temperatures, consistent with the presence of a low-temperature eutectic in the Li-Ag phase diagram. Additional support for this view was obtained from UHV non-electrochemical measurements involving vapor-deposited Li onto Ag, for which the amount of Li on the surface, as monitored by Auger electron spectroscopy, decreased markedly upon increasing the temperature from ca. 300 to 350 K. The voltammetry of oxygen-contaminated Ag surfaces was characterized by a well-defined peak in the scan in the positive direction centered at ca. 1.3 V, which persisted upon continuous cycling. Although the process responsible for this feature has not yet been identified, it provides a marker for detecting oxygen impurities on Ag in this electrolyte.

Original languageEnglish
Pages (from-to)2616-2619
Number of pages4
JournalJournal of the Electrochemical Society
Volume146
Issue number7
DOIs
Publication statusPublished - 1999 Jul 1
Externally publishedYes

Fingerprint

Lithium
Silver
Gases
Ultrahigh vacuum
Oxygen
Temperature
Auger electron spectroscopy
Voltammetry
Polyethylene oxides
Electrochemical properties
Eutectics
Electrolytes
Phase diagrams
Dissolution
Vapors
Impurities
Direction compound
Networks (circuits)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

Lithium deposition on polycrystalline silver. A comparison between electrochemical and gas-phase environments. / Li, Lin Feng; Totir, Dana A.; Gofer, Yosef; Wang, Kuilong; Chottiner, Gary S.; Scherson, Daniel Alberto.

In: Journal of the Electrochemical Society, Vol. 146, No. 7, 01.07.1999, p. 2616-2619.

Research output: Contribution to journalArticle

Li, Lin Feng ; Totir, Dana A. ; Gofer, Yosef ; Wang, Kuilong ; Chottiner, Gary S. ; Scherson, Daniel Alberto. / Lithium deposition on polycrystalline silver. A comparison between electrochemical and gas-phase environments. In: Journal of the Electrochemical Society. 1999 ; Vol. 146, No. 7. pp. 2616-2619.
@article{d40ed11622dd4446bb1ff02cd792d09a,
title = "Lithium deposition on polycrystalline silver. A comparison between electrochemical and gas-phase environments",
abstract = "The electrochemical properties of clean and oxygen-contaminated polycrystalline Ag surfaces have been examined in LiClO4/polyethylene oxide solutions in ultrahigh vacuum (UHV) environments at temperatures in the range 323-333 K. Unlike the behavior observed for Au and Ni under the same experimental conditions, no clearly defined voltammetric peaks were found during the first and subsequent cycles in the range 2.20-0.25 V vs. Li/Li+ initiated at the open-circuit potential, 1.75 V vs. Li/Li+. Instead, the scans in the negative direction were characterized by two adjoining regions in which the current increased linearly with potential, albeit at different rates, and the subsequent scans in the positive direction yielded comparatively much smaller currents largely independent of the applied potential. Integration of the voltammetric curves over the potential range 0.25<E<2.20 V vs. Li/Li+ revealed a pronounced imbalance between the charges obtained in the scans in the negative (Q-) and positive (Q+) directions. This phenomenon was attributed, by and large, to the high rates of Li dissolution into Ag at these temperatures, consistent with the presence of a low-temperature eutectic in the Li-Ag phase diagram. Additional support for this view was obtained from UHV non-electrochemical measurements involving vapor-deposited Li onto Ag, for which the amount of Li on the surface, as monitored by Auger electron spectroscopy, decreased markedly upon increasing the temperature from ca. 300 to 350 K. The voltammetry of oxygen-contaminated Ag surfaces was characterized by a well-defined peak in the scan in the positive direction centered at ca. 1.3 V, which persisted upon continuous cycling. Although the process responsible for this feature has not yet been identified, it provides a marker for detecting oxygen impurities on Ag in this electrolyte.",
author = "Li, {Lin Feng} and Totir, {Dana A.} and Yosef Gofer and Kuilong Wang and Chottiner, {Gary S.} and Scherson, {Daniel Alberto}",
year = "1999",
month = "7",
day = "1",
doi = "10.1149/1.1391981",
language = "English",
volume = "146",
pages = "2616--2619",
journal = "Journal of the Electrochemical Society",
issn = "0013-4651",
publisher = "Electrochemical Society, Inc.",
number = "7",

}

TY - JOUR

T1 - Lithium deposition on polycrystalline silver. A comparison between electrochemical and gas-phase environments

AU - Li, Lin Feng

AU - Totir, Dana A.

AU - Gofer, Yosef

AU - Wang, Kuilong

AU - Chottiner, Gary S.

AU - Scherson, Daniel Alberto

PY - 1999/7/1

Y1 - 1999/7/1

N2 - The electrochemical properties of clean and oxygen-contaminated polycrystalline Ag surfaces have been examined in LiClO4/polyethylene oxide solutions in ultrahigh vacuum (UHV) environments at temperatures in the range 323-333 K. Unlike the behavior observed for Au and Ni under the same experimental conditions, no clearly defined voltammetric peaks were found during the first and subsequent cycles in the range 2.20-0.25 V vs. Li/Li+ initiated at the open-circuit potential, 1.75 V vs. Li/Li+. Instead, the scans in the negative direction were characterized by two adjoining regions in which the current increased linearly with potential, albeit at different rates, and the subsequent scans in the positive direction yielded comparatively much smaller currents largely independent of the applied potential. Integration of the voltammetric curves over the potential range 0.25<E<2.20 V vs. Li/Li+ revealed a pronounced imbalance between the charges obtained in the scans in the negative (Q-) and positive (Q+) directions. This phenomenon was attributed, by and large, to the high rates of Li dissolution into Ag at these temperatures, consistent with the presence of a low-temperature eutectic in the Li-Ag phase diagram. Additional support for this view was obtained from UHV non-electrochemical measurements involving vapor-deposited Li onto Ag, for which the amount of Li on the surface, as monitored by Auger electron spectroscopy, decreased markedly upon increasing the temperature from ca. 300 to 350 K. The voltammetry of oxygen-contaminated Ag surfaces was characterized by a well-defined peak in the scan in the positive direction centered at ca. 1.3 V, which persisted upon continuous cycling. Although the process responsible for this feature has not yet been identified, it provides a marker for detecting oxygen impurities on Ag in this electrolyte.

AB - The electrochemical properties of clean and oxygen-contaminated polycrystalline Ag surfaces have been examined in LiClO4/polyethylene oxide solutions in ultrahigh vacuum (UHV) environments at temperatures in the range 323-333 K. Unlike the behavior observed for Au and Ni under the same experimental conditions, no clearly defined voltammetric peaks were found during the first and subsequent cycles in the range 2.20-0.25 V vs. Li/Li+ initiated at the open-circuit potential, 1.75 V vs. Li/Li+. Instead, the scans in the negative direction were characterized by two adjoining regions in which the current increased linearly with potential, albeit at different rates, and the subsequent scans in the positive direction yielded comparatively much smaller currents largely independent of the applied potential. Integration of the voltammetric curves over the potential range 0.25<E<2.20 V vs. Li/Li+ revealed a pronounced imbalance between the charges obtained in the scans in the negative (Q-) and positive (Q+) directions. This phenomenon was attributed, by and large, to the high rates of Li dissolution into Ag at these temperatures, consistent with the presence of a low-temperature eutectic in the Li-Ag phase diagram. Additional support for this view was obtained from UHV non-electrochemical measurements involving vapor-deposited Li onto Ag, for which the amount of Li on the surface, as monitored by Auger electron spectroscopy, decreased markedly upon increasing the temperature from ca. 300 to 350 K. The voltammetry of oxygen-contaminated Ag surfaces was characterized by a well-defined peak in the scan in the positive direction centered at ca. 1.3 V, which persisted upon continuous cycling. Although the process responsible for this feature has not yet been identified, it provides a marker for detecting oxygen impurities on Ag in this electrolyte.

UR - http://www.scopus.com/inward/record.url?scp=0032673991&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032673991&partnerID=8YFLogxK

U2 - 10.1149/1.1391981

DO - 10.1149/1.1391981

M3 - Article

AN - SCOPUS:0032673991

VL - 146

SP - 2616

EP - 2619

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

SN - 0013-4651

IS - 7

ER -