Journal
ELECTROCHIMICA ACTA
Volume 247, Issue -, Pages 600-609Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.06.128
Keywords
Li-ion batteries; electrolyte additives; silicon/carbon anodes; SEI layer; initial capacity loss; XPS analysis
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Funding
- European Commission [GA 315967]
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We investigated the effect of different electrolyte additives such as vinyl carbonate (VC), succinic anhydride (SA), and lithium bis(oxalato) borate (LiBOB) on the chemical composition of Solid Electrolyte Interphase (SEI) layer and the electrochemical performance of Si/MC electrodes. The electrochemical behavior of the Si/MC electrodes was evaluated by galvanostatic charge/discharge and rate capability tests. It was found that various electrolyte compositions result in the formation and the resulting properties of the SEI of the electrodes with different compounds. From X-ray Photoelectron Spectroscopy (XPS) analysis, the electrodes cycled in SA-and LiBOB-containing electrolytes show a higher amount of lithium carbonates and a thicker SEI layer than those in standard and VC-containing electrolyte. The electrode with VC 5w% shows an excellent reversible capacity of similar to 1100 mAh g (1) up to 100 charge-discharge cycles. (C) 2017 The Authors. Published by Elsevier Ltd.
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