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Behavior of the interface between lithium electrodes and organic electrolyte solutions

✍ Scribed by Masashi Ishikawa; Ken-Ya Otani; Masayuki Morita; Yoshiharu Matsuda

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
531 KB
Volume
41
Category
Article
ISSN
0013-4686

No coin nor oath required. For personal study only.

✦ Synopsis

The electrochemical behavior of the interface between lithium (Li) alloy electrodes containing a small amount of metal [aluminum (Al) or tin (Sn)] and a propylene carbonate (PC)-based electrolyte has been investigated. The contents of Al and Sn were below 3.0 wt.%. AC impedance analysis revealed that Li-AI electrodes showed relatively low and stable resistance at the electrode/electrolyte interface during the electrode immersion in the electrolyte as well as during charge-discharge cycling. On the other hand, a Li-Sn electrode gave higher interfacial resistance than a "pure" Li electrode. Cyclic voltammetry measurement and galvanostatic chargdischarge cycling test revealed the Li-Al electrode exhibited small polarization from the ideal redox potential of Li/Li+ during charging and discharging while the Li-Sn electrode showed relatively large polarization. The polarization behavior of the various electrodes correlated with the interfacial resistance characterized by the ac impedance measurement.

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