Electrolyte Decomposition Reactions on Tin- and Graphite-Based Anodes are Different

In ethylene carbonate- and propylene carbonate-based electrolytes, ethylene and propylene gas evolution have been monitored by on line mass spectrometry. The gases evolve on graphite but not on the lithium storage alloy. The results point to a difference in the electrolyte decomposition mechanism and thus in the solid electrolyte interphase (SEI) formation mechanism. This is discussed in view of solvent co-intercalation reactions, which only arise when graphite anodes are used. The ultimate conclusion is that, due to the different side reactions occurring on graphite and lithium storage alloys, the SEI compositions and the requirements on the SEI performance are different.

[1]  Zonghai Chen,et al.  Comparison of PVDF and PVDF-TFE-P as Binders for Electrode Materials Showing Large Volume Changes in Lithium-Ion Batteries , 2003 .

[2]  J. Dahn,et al.  The Electrochemical Reaction of Lithium with Tin Studied By In Situ AFM , 2003 .

[3]  Y. Rosenberg,et al.  Tin Alloy-Graphite Composite Anode for Lithium-Ion Batteries , 2002 .

[4]  P. Novák,et al.  DEMS study of gas evolution at thick graphite electrodes for lithium-ion batteries: the effect of γ-butyrolactone , 2001 .

[5]  M. Wagner,et al.  The effect of the binder morphology on the cycling stability of Li–alloy composite electrodes , 2001 .

[6]  Diana Golodnitsky,et al.  Composition, depth profiles and lateral distribution of materials in the SEI built on HOPG-TOF SIMS and XPS studies , 2001 .

[7]  Martin Winter,et al.  Tin and tin-based intermetallics as new anode materials for lithium-ion cells , 2001 .

[8]  P. Novák,et al.  Dilatometric Investigations of Graphite Electrodes in Nonaqueous Lithium Battery Electrolytes , 2000 .

[9]  Martin Winter,et al.  Electrochemical lithiation of tin and tin-based intermetallics and composites , 1999 .

[10]  Petr Novák,et al.  Oxidative Electrolyte Solvent Degradation in Lithium‐Ion Batteries: An In Situ Differential Electrochemical Mass Spectrometry Investigation , 1999 .

[11]  J. Besenhard,et al.  SUB-MICROCRYSTALLINE SN AND SN-SNSB POWDERS AS LITHIUM STORAGE MATERIALS FOR LITHIUM-ION BATTERIES , 1999 .

[12]  Petr Novák,et al.  In Situ Investigation of the Electrochemical Reduction of Carbonate Electrolyte Solutions at Graphite Electrodes , 1998 .

[13]  Martin Winter,et al.  Filming mechanism of lithium-carbon anodes in organic and inorganic electrolytes , 1995 .

[14]  Jeff Dahn,et al.  Studies of Lithium Intercalation into Carbons Using Nonaqueous Electrochemical Cells , 1990 .

[15]  G. Eggert,et al.  Electrochemical reactions of propylenecarbonate and electrolytes solved therein ― a DEMS study , 1986 .

[16]  O. Wolter,et al.  Differential Electrochemical Mass Spectroscopy (DEMS) — a New Method for the Study of Electrode Processes , 1984 .

[17]  F. Dousek,et al.  Electrochemical systems for galvanic cells in organic aprotic solvents: IV. Decomposition of propylene carbonate on lithium , 1973 .

[18]  A. Dey,et al.  The Electrochemical Decomposition of Propylene Carbonate on Graphite , 1970 .