2019
DOI: 10.1021/acs.jpcc.9b07179
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Artificial Solid Electrolyte Interphase Formation on Si Nanoparticles through Radiolysis: Importance of the Presence of an Additive

Abstract: In the context of energy transition, irradiation is a powerful tool to mimic quickly the modification of electrode materials upon charge/discharge cycles in lithium-ion batteries. In this study, the evolution of the surface of silicon nanoparticles upon irradiation in two electrolytes, containing or not fluoroethylene carbonate (FEC), was studied. In the presence of elastometric properties of the polymer formed in presence of FEC is thought to be responsible for the formation of the homogeneous layer on the Si… Show more

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Cited by 9 publications
(5 citation statements)
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“…However we note that repeated measurements of the O K-edge at OCV show no significant changes over time, suggesting any beam-induced SEI growth is limited. Either way, the radiolytic decomposition products of carbonate-based electrolytes are expected to closely resemble those due to electrochemical reduction 74 79 .…”
Section: Resultsmentioning
confidence: 99%
“…However we note that repeated measurements of the O K-edge at OCV show no significant changes over time, suggesting any beam-induced SEI growth is limited. Either way, the radiolytic decomposition products of carbonate-based electrolytes are expected to closely resemble those due to electrochemical reduction 74 79 .…”
Section: Resultsmentioning
confidence: 99%
“…[9] A way to enhance the mechanical stability of the SEI consists of adding a compound to the electrolyte, an additive, such as fluoroethylene carbonate (FEC, see Scheme 1). [10][11][12][13] However, there is no definitive answer on the amount of FEC to be used (from 2% to 30%) [11] or if other additives such as vinylene carbonate (VC, see Scheme 1) could play the same role as FEC. Such uncertainty comes from the lack of access of most studies to the processes by which FEC leads to a SEI of proper composition.…”
Section: Introductionmentioning
confidence: 99%
“…Either way, the radiolytic decomposition products of carbonatebased electrolytes are expected to closely resemble those due to electrochemical reduction. [90][91][92][93][94][95] Figure 5a shows that the four main peaks (I-IV) associated with the EC/DMC solvent are apparent in the FY spectrum of the O K-edge at OCV. On cycling to lower potentials, little variation from the spectrum at OCV is seen until 0.7 V, where a low energy shoulder corresponding to peak I* begins to grow in intensity, becoming clearly apparent at 0.05 V. Alongside this, peak I is seen to decrease in intensity while peak III grows, with peaks II and IV maintaining similar intensities.…”
Section: Spectral Evolutionmentioning
confidence: 99%