Overcharge effect on morphology and structure of carbon electrodes for lithium-ion batteries

Wenquan Lu, Carmen M. López, Nathan Liu, John T. Vaughey, Andrew Jansen, Dennis W. Dees

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

Lithium metal plating on graphite anodes of Li-ion batteries is one of the causes of capacity fading and failure. An overcharge experiment on the graphite anode was conducted and the morphology and structure of graphite were characterized using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was found that the failure mechanism of graphite during overcharge is similar to that of the lithium metal electrode. The deposited lithium will react with the electrolyte to form a new solid electrolyte interface (SEI) layer, which will prevent further accessibility during the following cycles. According to SEM and TEM images, this SEI layer shares the same morphologies of the lithium metal electrode during cycling.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume159
Issue number5
DOIs
Publication statusPublished - 2012
Externally publishedYes

Fingerprint

Graphite
Lithium
electric batteries
Carbon
graphite
lithium
Electrodes
electrodes
carbon
Solid electrolytes
solid electrolytes
Anodes
ions
anodes
Metals
metals
Transmission electron microscopy
transmission electron microscopy
Scanning electron microscopy
cycles

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

Overcharge effect on morphology and structure of carbon electrodes for lithium-ion batteries. / Lu, Wenquan; López, Carmen M.; Liu, Nathan; Vaughey, John T.; Jansen, Andrew; Dees, Dennis W.

In: Journal of the Electrochemical Society, Vol. 159, No. 5, 2012.

Research output: Contribution to journalArticle

Lu, Wenquan ; López, Carmen M. ; Liu, Nathan ; Vaughey, John T. ; Jansen, Andrew ; Dees, Dennis W. / Overcharge effect on morphology and structure of carbon electrodes for lithium-ion batteries. In: Journal of the Electrochemical Society. 2012 ; Vol. 159, No. 5.
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