Formation of Reversible Solid Electrolyte Interface on Graphite Surface from Concentrated Electrolytes

Dongping Lu, Jinhui Tao, Pengfei Yan, Wesley A. Henderson, Qiuyan Li, Yuyan Shao, Monte L. Helm, Oleg Borodin, Gordon L. Graff, Bryant Polzin, Chong Min Wang, Mark Engelhard, Ji Guang Zhang, James J. De Yoreo, Jun Liu, Jie Xiao

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Li-ion batteries (LIB) have been successfully commercialized after the identification of ethylene-carbonate (EC)-containing electrolyte that can form a stable solid electrolyte interphase (SEI) on carbon anode surface to passivate further side reactions but still enable the transportation of the Li+ cation. These electrolytes are still utilized, with only minor changes, after three decades. However, the long-term cycling of LIB leads to continuous consumption of electrolyte and growth of SEI layer on the electrode surface, which limits the battery’s life and performance. Herein, a new anode protection mechanism is reported in which, upon changing of the cell potential, the electrolyte components at the electrode-electrolyte interface reorganize reversibly to form a transient protective surface layers on the anode. This layer will disappear after the applied potential is removed so that no permanent SEI layer is required to protect the carbon anode. This phenomenon minimizes the need for a permanent SEI layer and prevents its continuous growth and therefore may lead to largely improved performance for LIBs.

Original languageEnglish
Pages (from-to)1602-1609
Number of pages8
JournalNano letters
Volume17
Issue number3
DOIs
Publication statusPublished - Mar 8 2017

Keywords

  • Li-ion battery
  • Solid electrolyte interface
  • concentrated electrolyte
  • electrochemistry
  • graphite

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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  • Cite this

    Lu, D., Tao, J., Yan, P., Henderson, W. A., Li, Q., Shao, Y., Helm, M. L., Borodin, O., Graff, G. L., Polzin, B., Wang, C. M., Engelhard, M., Zhang, J. G., De Yoreo, J. J., Liu, J., & Xiao, J. (2017). Formation of Reversible Solid Electrolyte Interface on Graphite Surface from Concentrated Electrolytes. Nano letters, 17(3), 1602-1609. https://doi.org/10.1021/acs.nanolett.6b04766