In 2022,Vila, Mallory N.; Bernardez, Edelmy Marin; Li, Wenzao; Stackhouse, Chavis A.; Kern, Christopher J.; Head, Ashley R.; Tong, Xiao; Yan, Shan; Wang, Lei; Bock, David C.; Takeuchi, Kenneth J.; Housel, Lisa M.; Marschilok, Amy C.; Takeuchi, Esther S. published an article in ACS Applied Materials & Interfaces. The title of the article was 《Interfacial Reactivity of Silicon Electrodes: Impact of Electrolyte Solvent and Presence of Conductive Carbon》.Reference of Vinylene carbonate The author mentioned the following in the article:
Silicon (Si) is a promising high-capacity material for lithium-ion batteries; however, its limited reversibility hinders com. adoption. Approaches such as particle and crystallite size reduction, introduction of conductive carbon, and use of different electrolyte solvents have been explored to overcome these electrochem. limitations. Herein, operando isothermal microcalorimetry (IMC) is used to probe the influence of silicon particle size, electrode composition, and electrolyte additives fluoroethylene carbonate and vinylene carbonate on the heat flow during silicon lithiation. The IMC data are complemented by X-ray photoelectron and Raman spectroscopies to elucidate differences in solid electrolyte interphase (SEI) composition Nanosized (~50 nm, n-Si) and micrometer-sized (~4μm, μ-Si) silicon electrodes are formulated with and without amorphous carbon and electrochem. lithiated in ethylene carbonate (EC), fluoroethylene carbonate (FEC), or vinylene carbonate (VC) based electrolytes. Notably, n-Si electrodes generate 53-61% more normalized heat relative to their μ-Si counterparts, consistent with increased surface area and electrode/electrolyte reactivity. Introduction of amorphous carbon significantly alters the heat flow profile where multiple exothermic peaks and increased normalized heat dissipation are observed for all electrolyte types. Notably, the VC-containing electrolyte demonstrates the greatest normalized heat dissipation of the electrode compositions tested showing as much as a 50% increase compared to the EC or FEC counterparts. The results are relevant to the understanding of silicon neg. electrode function in the presence of electrolyte additives and provide insight relative to silicon containing cell reactivity and safety.Vinylene carbonate(cas: 872-36-6Reference of Vinylene carbonate) was used in this study.
Vinylene carbonate(cas: 872-36-6) belongs to esters. Alkyl carbonates find applications as solvents for lithium ion battery electrolytes and the use of high quality battery grade electrolytes having extremely low water (<10 ppm) and acid (<10 ppm) contents are critical for achieving high electrochemical performance.Reference of Vinylene carbonate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics