| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 183592 | Electrochimica Acta | 2015 | 7 Pages |
Abstract
Zwitterions with a cyano group on the side chain (CZ) were synthesized. Although the addition of CZ caused a slightly negative effect on viscosity, ionic conductivity, limiting current density, and lithium transference number, the oxidation limit of PEGDME/lithium bis(trifluoromethylsulfonyl)amide (LiTFSA) composites was improved to over 5 V. For charge/discharge testing using Li|electrolyte|LiCoO2 cells, the cycle stability of PEGDME/LiTFSA with CZ in the voltage range of 3.0–4.6 V was much higher than that of PEGDME/LiTFSA. Incorporating a small mole fraction of CZ into PEGDME-based electrolytes prevented an increase in the interface resistance between the electrolyte and cathode with increasing numbers of the cycle.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Seitaro Yamaguchi, Masahiro Yoshizawa-Fujita, Haijin Zhu, Maria Forsyth, Yuko Takeoka, Masahiro Rikukawa,