Electrochemical behavior of Al in a non-aqueous alkyl carbonate solution containing LiBOB salt

JOURNAL OF POWER SOURCES

卷:195

Article

Myung, Seung-Taek¹  Natsui, Hiroshi¹  Sun, Yang-Kook²  Yashiro, Hitoshi¹ 

[1] Iwate Univ, Dept Chem Engn, Morioka, Iwate 0208551, Japan

[2] Hanyang Univ, Dept Energy Engn, Seoul 133791, South Korea

关键词: Al;    Current collector;    Passivation;    LiBOB;    Lithium;    Battery;   

DOI  :  10.1016/j.jpowsour.2010.07.027

来源: Elsevier

【 摘 要 】

Aluminum was studied as a current collector for rechargeable lithium batteries to understand electro-chemical and passivation behavior. Electrochemical polarization tests, in situ scratch polarization tests and time-of-flight secondary ion mass spectroscopy (ToF-SIMS) analysis in lithium bis-oxalato borate (LiBOB)-containing alkyl carbonate solution were conducted. The Al foil did not follow the alloy and de-alloy process with the LiBOB salt in electrolyte at 0 V vs. Li/Li+ in the cathodic sweep. During the anodic scan to the noble direction, the absence of an oxidation peak up to 3 V vs. Li/Li+ indicated that the air-formed oxide layer of Al was not reduced to metal. Oxide-free Al surfaces made by the in situ scratch test during the electrochemical polarization resulted in abrupt alloy formation with Li at 0 V vs. Li/Li+, but the newly formed surface formed passive films at higher potential with oxygen, namely, Al-O compound, as confirmed by ToF-SIMS. (c) 2010 Elsevier B.V. All rights reserved.

【 授权许可】

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