Enhancement in Cycle Life of Metallic Lithium Electrodes Protected with Fp-Silanes

Susanna Neuhold, John T. Vaughey, Christa Grogger, Carmen M. Lopez*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Metallic lithium is a promising anode material whose application in rechargeable batteries has been limited by complicated chemical and morphological changes during cycling. These problems can be addressed by the introduction of protective coatings that help to improve the interphasial properties of these electrodes. In this study we used a dip-coating method to generate protective Fp-silane-derived coatings by direct reaction with the surface of metallic lithium. The effect of these coatings has been investigated by comparing the electrochemical performance of coated vs. uncoated electrodes through galvanostatic cycling and electrochemical impedance spectroscopy (EIS). A cycle life enhancement of up to 500% of that of uncoated lithium was observed. Additionally, we observed a trade-off between the value of the obtained stable capacity and the cycle life, which depended on the type of organic substituent on the silane moiety. These results imply that application-tailored protective coatings might, in the near future, enable the efficient use of metallic lithium electrodes in rechargeable batteries.
Original languageEnglish
Pages (from-to)241-248
JournalJournal of Power Sources
Volume254
DOIs
Publication statusPublished - 2014

Fields of Expertise

  • Advanced Materials Science

Treatment code (Nähere Zuordnung)

  • Application
  • Experimental

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