Bibliographic Details
| Title: |
Investigation of N-Ethyl-2-Pyrrolidone (NEP) as Electrolyte Additive in Regard to Overcharge Protecting Characteristics. |
| Authors: |
Vogl, Ulrike1 ulrike.vogl@uni-muenster.de, Schmitz, Andre1, Stock, Christoph1, Badillo, Juan Pablo1, Gores, Heiner Jakob1, Winter, Martin1 martin.winter@uni-muenster.de |
| Source: |
Journal of The Electrochemical Society. 2014, Vol. 161 Issue 9, pA1407-A1414. 8p. |
| Subjects: |
Battery additives, Pyrrolidinones, Chemical stability, Electrochemistry |
| Abstract: |
We report on overcharge protection characteristics of N-ethyl-2-pyrrolidone (NEP) as electrolyte additive. The electrochemical stability of this organic compound was investigated on a platinum working electrode using linear sweep voltammetry. We investigated the overcharge protection effect on a lithium iron phosphate (LFP), a lithium nickel manganese cobalt oxide (NMC) and on a LiMn2O4 (LMO) cathode. Via electrochemical quartz crystal microbalance (EQCMB) measurements the effects of NEP during overcharge were studied and revealed that NEP acts not like a redox shuttle, but is forming a protecting polymeric film. The oxidation products on the cathode were studied by analyzing the surface of the lithium iron phosphate (LFP) and LiMn2O4 (LMO) cathode using XPS spectroscopy. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
