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Title: Investigation of Glutaric Anhydride as an Electrolyte Additive for Graphite/LiNi 0.5 Mn 0.3 Co 0.2 O 2 Full Cells

Journal Article · · Journal of the Electrochemical Society
DOI:https://doi.org/10.1149/2.0721702jes· OSTI ID:1429907
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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. (C) 2016 The Electrochemical Society. All rights reserved.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
DOE Contract Number:
AC02-06CH11357
OSTI ID:
1429907
Journal Information:
Journal of the Electrochemical Society, Vol. 164, Issue 2; ISSN 0013-4651
Publisher:
The Electrochemical Society
Country of Publication:
United States
Language:
English

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