Anodic Oxidation of Conductive Carbon and Ethylene Carbonate in High-Voltage Li-Ion Batteries Quantified by On-Line Electrochemical Mass Spectrometry
By Michael Metzger, C. Marino, J. Sicklinger, Dominik Haering, H. Gasteiger. 2015
172 citations recorded by the source corpus.
The anodic oxidation stability of battery components like the conductive carbon black (Super C65) and the co-solvent ethylene carbonate (EC) is of great relevance, especially with regards to high-voltage cathode materials. In this study, we use On-line Electrochemical Mass Spectrometry (OEMS) to deconvolute the CO and CO2 evolution from the anodic oxidation of carbon and electrolyte by using a fully 13C-isotope labeled electrolyte based on ethylene carbonate with 2 M LiClO4. We present a newly developed two-compartment cell, which provides a tight seal between anode and cathode compartment via a solid Li+-ion conducting separator, and which thus allows us to examine the effect of trace amounts of water on the anodic oxidation of carbon (12C) and ethylene carbonate (13C) at high potentials (> 4.5 V) and 10 to 60◦C. Moreover, we report on the temperature dependence of the water-driven hydrolysis of ethylene carbonate accompanied by CO2 evolution. Finally, by quantifying the evolution rates of CO/CO2 and CO/CO2 at 5.0 V, we demonstrate that the anodic oxidation of carbon and electrolyte can be substantial, especially at high temperature and in the presence of trace water, posing significant challenges for the implementation of 5 V cathode materials. © The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: oa@electrochem.org. [DOI: 10.1149/2.0951506jes] All rights reserved.
Subfields: Automotive Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/a2142702c79223b07b708a949d0a1172a21e9145
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Citations in the corpus
- A review of gas evolution in lithium ion batteries (2020, methodology): “Ethylene carbonate is the candidate used in literature [24], this solvent is chosen for its low vapour pressure in comparison with other carbonate solvents (DMC, EMC) reducing the impact of the electrolyte solvent on the OEMS signal whilst maintain stable SEI formation.”