Allyl ethyl carbonate as an additive for lithium-ion battery electrolytes

Abstract The role of allyl ethyl carbonate (AEC) as an additive in electrolytes used in lithium-ion batteries is investigated. The 1.0 M LiPF 6 in propylene carbonate (PC): diethyl carbonate (DEC) (3:2 in volume) electrolyte containing AEC can suppress the co-intercalation of PC and inhibit the decomposition of electrolytes during the first lithium intercalation. A graphitic anode (MCMB-2528, mesocarbon microbeads) in a PC-based electrolyte exhibits a high reversible capacity of 320 mAh g −1 . The reduction potential of AEC is 1.5 V versus Li|Li + as determined by cyclic voltammetry (CV). The morphology and structure of graphite electrodes after the first charge–discharge cycle are investigated by scanning electron microscopy (SEM) and X-ray powder diffraction (XRD). AEC decomposes and forms a proper solid electrolyte interphase (SEI) film on the MCMB surface. The SEI film not only prevents exfoliation of the graphite electrode but also stabilizes the electrolyte. AEC helps to improve the cycleability of lithium-ion batteries to a considerable extent.

[1]  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 .

[2]  J. Besenhard,et al.  Cathodic reduction of graphite in organic solutions of alkali and NR4+ salts , 1974 .

[3]  R. Kostecki,et al.  Electrochemical and Infrared Studies of the Reduction of Organic Carbonates , 2001 .

[4]  Martin Winter,et al.  Inorganic film-forming electrolyte additives improving the cycling behaviour of metallic lithium electrodes and the self-discharge of carbon—lithium electrodes , 1993 .

[5]  Congxiao Wang,et al.  Electrochemical behaviour of a graphite electrode in propylene carbonate and 1,3-benzodioxol-2-one based electrolyte system , 1998 .

[6]  Petr Novák,et al.  Insertion Electrode Materials for Rechargeable Lithium Batteries , 1998 .

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

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

[9]  J. Besenhard,et al.  Corrosion Protection of LiCn Anodes in Rechargeable Organic Electrolyte Batteries , 1992 .

[10]  J. J. Murray,et al.  Use of Chloroethylene Carbonate as an Electrolyte Solvent for a Lithium Ion Battery Containing a Graphitic Anode , 1995 .

[11]  M. Inaba,et al.  Electrochemical Lithium Intercalation within Carbonaceous Materials: Intercalation Processes, Surface Film Formation, and Lithium Diffusion , 1998 .

[12]  Yair Ein-Eli,et al.  The Role of SO 2 as an Additive to Organic Li‐Ion Battery Electrolytes , 1997 .

[13]  Martin Winter,et al.  Ethylene Sulfite as Electrolyte Additive for Lithium‐Ion Cells with Graphitic Anodes , 1999 .

[14]  Martin Winter,et al.  Propylene Sulfite as Film-forming Electrolyte Additive in Lithium Ion Batteries , 1999 .

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

[16]  Jaafar Ghanbaja,et al.  New halogenated additives to propylene carbonate-based electrolytes for lithium-ion batteries , 2000 .

[17]  Jürgen Besenhard,et al.  Effect of polysulfide-containing electrolyte on the film formation of the negative electrode , 1997 .

[18]  B. Simon,et al.  Electrochemical study of the passivating layer on lithium intercalated carbon electrodes in nonaqueous solvents , 1993 .