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Recovery of Metallic Lithium by Room-Temperature Electrolysis: I. Effect of Electrode Materials

상온(常溫) 전해법(電解法)에 의한 리튬 금속(金屬)의 회수(回收): I. 전극물질(電極物質)의 영향(影響)

  • Lee, Jae-O (School of Advanced Materials & System Eng., Kumoh National Institute of Technology) ;
  • Park, Jesik (School of Advanced Materials & System Eng., Kumoh National Institute of Technology) ;
  • Lee, Churl Kyoung (School of Advanced Materials & System Eng., Kumoh National Institute of Technology)
  • 이재오 (김오공과대학교 신소재시스템공학부) ;
  • 박제식 (김오공과대학교 신소재시스템공학부) ;
  • 이철경 (김오공과대학교 신소재시스템공학부)
  • Received : 2012.07.27
  • Accepted : 2012.10.11
  • Published : 2012.12.31

Abstract

The room-temperature electrodeposition of metallic lithium was investigated from ionic liquid, 1-methyl-1-propylpiperidinium bis(trifluoromethanesulfonyl)imide (PP13TFSI) with lithium bis (trifluoromethanesulfonyl)imide (LiTFSI) as a lithium source. Cyclic voltammograms on gold working electrode showed the possibility of the electrodeposition of metallic lithium, and the reduction current on a gold electrode was higher than the value on platinum and copper. The metallic lithium could be electrodeposited on the gold electrode under potentiostatic condition at -2.4 V (vs. Pt-QRE) and was confirmed by analytical techniques including XRD and SEM-EDS. The dendrite-typed electrodeposits were composed of a metallic lithium and a alloy with gold substrate. And any impurity could be detected except for trace oxygen introduced during handling for the analyses.

Acknowledgement

Supported by : 환경부

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