Taming Ultrahigh Energy Cathodes with Stabilizing Coatings: Harnessing Atomic Layer Deposition to Deploy High-Nickel, Cobalt-Free Cathodes in Electric Vehicles
Explore the source record for details and available documents.
25 ENERGY STORAGE↗
Engineering topics
Pekarek, Ryan
Publications and source records attributed to Pekarek, Ryan.
Examining CO 2 as an Additive for Solid Electrolyte Interphase Formation on Silicon Anodes
In this study, we demonstrate that the addition of CO 2 to a standard 1.0 M LiPF 6 3:7 wt% ethylene carbonate:ethyl methyl carbonate electrolyte results in the formation of a thinner insoluble solid electrolyte interphase (SEI) that is dominated by the presence of LiF. In contrast, cells without CO 2 result in a thicker insoluble SEI layer containing more organic constituents. The CO 2 is incorporated in the dimethyl carbonate soluble part of the SEI composed primarily of polymeric poly(ethylene oxide) (PEO) on the surface of a thin inorganic layer. This combination of properties from CO 2 addition provides an improved cycling performance through the reduction of irreversible side reactions, leading to higher coulombic efficiency. The results indicate that CO 2 incorporates into the SEI and plays a role similar to additives like fluorinated ethylene carbonate and vinylene carbonate with respect to polymeric components.
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗