Improved Performance of Silicon-Containing Anodes with Organic Solvent-Solubilized Lithium Nitrate

Authors

Leah Rynearson, University of Rhode Island
Chamithri Jayawardana, University of Rhode Island
Munaiah Yeddala
Brett L. Lucht, University of Rhode IslandFollow

Document Type

Article

Date of Original Version

2023

Department

Chemistry

Abstract

Three different organic solvents (dimethylacetamide (DMAc), dimethylformamide (DMF), and dimethyl sulfoxide (DMSO)) were used to improve the solubility of LiNO₃ in a standard carbonate-based electrolyte with lithium difluoro(oxalato)borate (LiDFOB) as the salt. Together, the LiDFOB and organic-solvent solubilized LiNO₃ preferentially reduce on the surface of silicon-containing anodes to create an SEI rich in oxalates, nitrate decomposition species, and B-F species. The improved stability of the SEI throughout the first 100 cycles results in silicon and silicon/graphite composite anodes with better capacity retention than observed with standard electrolytes or fluoroethylene carbonate (FEC) containing electrolytes. This study demonstrates the feasibility of the use of non-traditional electrolyte solvents in the improvement and optimization of lithium ion-battery electrolytes.

Publication Title, e.g., Journal

Journal of The Electrochemical Society

Volume

170

Citation/Publisher Attribution

Rynearson, L., Jayawardana, C., Yeddala, M. & Lucht, B. L. (2023). Improved Performance of Silicon-Containing Anodes with Organic Solvent-Solubilized Lithium Nitrate. Journal of The Electrochemical Society, 170, 060525. https://doi.org/10.1149/1945-7111/acdd26

Available at: https://doi.org/10.1149/1945-7111/acdd26

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 License.