Chemical Analysis of Graphite/Electrolyte Interface Formed in LiBOB-Based Electrolytes

To understand the source of thermal stability of LiBOB-based electrolyte in lithium-ion cells as well as its unique ability to stabilize graphitic anodes even in the strongly exfoliating solvent propylene carbonate (PC), the solid electrolyte interface on graphite formed by LiBOB-based electrolyte was investigated by X-ray photoelectron spectroscopy. Preliminary results show that, due to the BOB anion presence, the content of semicarbonate-like components in the graphite/electrolyte interface increases significantly, as indicated by the conspicuous peak located at 289 eV. These components, believed to originate from the oxalato moiety of the anion, are mainly responsible for the protection of graphitic anodes, either at elevated temperatures or in the presence of PC.

[1]  J. Kerr,et al.  Chemical reactivity of PF{sub 5} and LiPF{sub 6} in ethylene carbonate/dimethyl carbonate solutions , 2001 .

[2]  Richard T. Haasch,et al.  Surface Characterization of Electrodes from High Power Lithium-Ion Batteries , 2002 .

[3]  J. Arai.  Nonflammable Methyl Nonafluorobutyl Ether for Electrolyte Used in Lithium Secondary Batteries , 2003 .

[4]  M. Dresselhaus,et al.  Intercalation compounds of graphite , 1981 .

[5]  Kristina Edström,et al.  Chemical Composition and Morphology of the Elevated Temperature SEI on Graphite , 2001 .

[6]  Geun-Chang Chung,et al.  Origin of Graphite Exfoliation An Investigation of the Important Role of Solvent Cointercalation , 2000 .

[7]  E. Peled,et al.  An Advanced Tool for the Selection of Electrolyte Components for Rechargeable Lithium Batteries , 1998 .

[8]  T. Jow,et al.  Liquid/Solid Phase Diagrams of Binary Carbonates for Lithium Batteries Part II , 2001 .

[9]  Doron Aurbach,et al.  Morphology/Behavior Relationship in Reversible Electrochemical Lithium Insertion into Graphitic Materials , 2002 .

[10]  H. Fujimoto,et al.  Charge-discharge mechanism of graphitized mesocarbon microbeads , 1995 .

[11]  Wu Xu,et al.  Weakly Coordinating Anions, and the Exceptional Conductivity of Their Nonaqueous Solutions , 2001 .

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

[13]  Kang Xu,et al.  Liquid‐Solid Phase Diagrams of Binary Carbonates for Lithium Batteries , 2000 .

[14]  D. Aurbach,et al.  The Study of Electrolyte Solutions Based on Ethylene and Diethyl Carbonates for Rechargeable Li Batteries I . Li Metal Anodes , 1995 .

[15]  J. Prakash,et al.  Evaluation of Graphite Materials as Anodes for Lithium‐Ion Batteries , 2000 .

[16]  D. Aurbach,et al.  The Study of Electrolyte Solutions Based on Ethylene and Diethyl Carbonates for Rechargeable Li Batteries II . Graphite Electrodes , 1995 .

[17]  Kang Xu,et al.  LiBOB as Salt for Lithium-Ion Batteries:A Possible Solution for High Temperature Operation , 2002 .

[18]  D. Aurbach,et al.  Comparison Between the Electrochemical Behavior of Disordered Carbons and Graphite Electrodes in Connection with Their Structure , 2001 .

[19]  Doron Aurbach,et al.  The dependence of the performance of Li-C intercalation anodes for Li-ion secondary batteries on the electrolyte solution composition , 1994 .

[20]  Kang Xu,et al.  Lithium Bis(oxalato)borate Stabilizes Graphite Anode in Propylene Carbonate , 2002 .