Experimental and theoretical studies on reduction mechanism of vinyl ethylene carbonate on graphite anode for lithium ion batteries

来自掌桥科研

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185

作者：

Y Hu，W Kong，L Hong，X Huang，L Chen

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摘要：

Vinyl ethylene carbonate (VEC) has been investigated as an electrolyte additive for use in lithium ion batteries. Even in small additive amounts (5 vol%) VEC was capable of preventing propylene carbonate (PC) co-intercalation into graphite. The formation of a stable passivating film on the graphite surface is believed to be the reason for the improved cell performance. The passivating film resulting from the reductive decomposition of VEC on the graphite surface was comprehensively studied by FTIR and XPS as well as the density functional theory (DFT) calculations.

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关键词：

Theoretical or Mathematical, Experimental/ anodes density functional theory Fourier transform spectra graphite infrared spectra passivation polymer electrolytes reduction (chemical) X-ray photoelectron spectra/ reduction mechanism vinyl ethylene carbonate graphite anode lithium ion batteries electrolyte additive propylene carbonate stable passivating film graphite surface reductive decomposition Fourier transform infrared spectroscopy X-ray photoelectron spectroscopy density functional theory C/ A8245 Electrochemistry and electrophoresis A8280P Electron spectroscopy for chemical analysis (photoelectron, Auger spectroscopy, etc.) A8160 Corrosion, oxidation, etching, and other surface treatments A7960 Photoemission and photoelectron spectra (condensed matter) A7830 Infrared and Raman spectra and scattering (condensed matter) A8230 Specific chemical reactions reaction mechanisms A7830J Infrared and Raman spectra in organic crystals A8160J Surface treatment and degradation of polymers