Overcharge Effect on Morphology and Structure of Carbon Electrodes for Lithium-Ion Batteries

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.

[1]  Jean-Marie Tarascon,et al.  In situ SEM study of the interfaces in plastic lithium cells , 1999 .

[2]  E. Takeuchi,et al.  A study of the overcharge reaction of lithium-ion batteries , 2001 .

[3]  Dennis W. Dees,et al.  Morphological Transitions on Lithium Metal Anodes , 2009 .

[4]  J. Tarascon,et al.  An update on the reactivity of nanoparticles Co-based compounds towards Li , 2003 .

[5]  Doron Aurbach,et al.  Design of electrolyte solutions for Li and Li-ion batteries: a review , 2004 .

[6]  Kang Xu,et al.  Study of the charging process of a LiCoO2-based Li-ion battery , 2006 .

[7]  Marc Doyle,et al.  Mathematical Modeling of the Lithium Deposition Overcharge Reaction in Lithium‐Ion Batteries Using Carbon‐Based Negative Electrodes , 1999 .

[8]  Sylvie Grugeon,et al.  Deciphering the multi-step degradation mechanisms of carbonate-based electrolyte in Li batteries , 2008 .

[9]  Charles W. Monroe,et al.  Direct in situ measurements of Li transport in Li-ion battery negative electrodes , 2009 .

[10]  J. Dahn,et al.  The effect of turbostratic disorder on the staging transitions in lithium intercalated graphite , 1995 .

[11]  M. Broussely,et al.  Main aging mechanisms in Li ion batteries , 2005 .

[12]  A. Negishi,et al.  Thermal behaviors of lithium-ion cells during overcharge , 2001 .

[13]  Hsiu-Ping Lin,et al.  Low-Temperature Behavior of Li-Ion Cells , 2001 .

[14]  D. Aurbach.  Review of selected electrode–solution interactions which determine the performance of Li and Li ion batteries , 2000 .

[15]  M. Wohlfahrt‐Mehrens,et al.  Ageing mechanisms in lithium-ion batteries , 2005 .