Abstract
The effects of glutaric anhydride (GA) as an electrolyte additive for graphite/LiNi0.5Mn0.3Co0.2O2 full cells operating between 3.0–4.4 V were investigated. Linear scan voltammetry (LSV) revealed that GA preferentially oxidized prior to the carbonate-based electrolyte while Li/graphite half cells revealed that GA can suppress electrolyte decomposition on the graphite electrode giving rise to the bifunctional nature of this additive. The addition of both 0.5 and 1.0 wt% of GA into the carbonate-based electrolyte resulted in superior cycling performance compared to the baseline electrolyte as demonstrated by the slight increase in initial capacities and significant increases in capacity retention over 117 cycles at C/3. Electrochemical impedance spectroscopy (EIS) showed that while the overall impedance of the GA containing cells was higher than the cells with the baseline electrolyte the change in impedance between post-formation and post-cycling was smallest for the cells containing GA. Additionally, X-ray photoelectron spectroscopy (XPS) analysis confirmed that GA decomposed on the cathode surface leading to an increase in oxygen-containing species, a decrease in LiF species and a simultaneous increase in LixPOyFz species.
| Original language | English (US) |
|---|---|
| Pages (from-to) | A173-A179 |
| Journal | Journal of the Electrochemical Society |
| Volume | 164 |
| Issue number | 2 |
| DOIs | |
| State | Published - 2017 |
Funding
Support from the U.S. Department of Energy’s Vehicle Technologies Program (DOE-VTP), specifically from Peter Faguy and Dave Howell, is gratefully acknowledged. The electrodes and cells used in this article were fabricated at Argonne’s Cell Analysis, Modeling and Prototyping (CAMP) Facility. The facilities are supported within the core funding of the Applied Battery Research (ABR) for Transportation Program. We are grateful to team members at CAMP, especially Dees, W. Lu, S. Trask and B. Polzin for their help and guidance. This work made use of Northwestern University Central Facilities supported by the Materials Research Science and Engineering Center (MRSEC) through National Science Foundation (NSF) under Contract DMR-1121262. The submitted manuscript has been created by UChicagoArgonne, LLC, Operator of Argonne National Laboratory (“Argonne”). Argonne, a U.S. Department of Energy Office of Science laboratory, is operated under Contract No. DE-AC02-06CH11357. The U.S. Government retains for itself, and others acting on its behalf, a paidup nonexclusive, irrevocable worldwide license in said article to reproduce, prepare derivative works, distribute copies to the public, and perform publicly and display publicly, by or on behalf of the Government.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Electrochemistry
- Materials Chemistry
