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Title: Identification of Electrolyte-Soluble Organic Cross-Talk Species in a Lithium-Ion Battery via a Two-Compartment Cell

Abstract

Electrode cross-talk in lithium-ion batteries has been increasingly recognized in recent years as an explanation for several performance trends during cycling. However, little is known about the nature of such cross-talk species/reactions. In an attempt to further that understanding, we constructed a two-compartment lithium-ion cell using a solid-state lithium-ion conductor as the separator to block the movement of species generated at one electrode to the other. After a long-term hold at a high voltage, the electrolytes extracted from each side were analyzed via high-performance liquid chromatography coupled with electrospray ionization mass spectrometry and nuclear magnetic resonance spectroscopy. We compared these results with those from a coin cell made with a regular porous separator. Extra species were present in the coin cell, which were absent in both compartments of the two-compartment cell, and we identified them as cross-talk species. We propose chemical structures for such species and show that these species likely have carbon carbon double bonds and fluorinated carbons. Finally, we also confirm that the organophosphate-type species proposed by several groups previously are indeed generated at the anode.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1531166
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Chemistry of Materials
Additional Journal Information:
Journal Volume: 31; Journal Issue: 8; Journal ID: ISSN 0897-4756
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; electrolyte decomposition; lithium-ion battery

Citation Formats

Sahore, Ritu, Dogan, Fulya, and Bloom, Ira D. Identification of Electrolyte-Soluble Organic Cross-Talk Species in a Lithium-Ion Battery via a Two-Compartment Cell. United States: N. p., 2019. Web. doi:10.1021/acs.chemmater.9b00063.
Sahore, Ritu, Dogan, Fulya, & Bloom, Ira D. Identification of Electrolyte-Soluble Organic Cross-Talk Species in a Lithium-Ion Battery via a Two-Compartment Cell. United States. doi:10.1021/acs.chemmater.9b00063.
Sahore, Ritu, Dogan, Fulya, and Bloom, Ira D. Tue . "Identification of Electrolyte-Soluble Organic Cross-Talk Species in a Lithium-Ion Battery via a Two-Compartment Cell". United States. doi:10.1021/acs.chemmater.9b00063.
@article{osti_1531166,
title = {Identification of Electrolyte-Soluble Organic Cross-Talk Species in a Lithium-Ion Battery via a Two-Compartment Cell},
author = {Sahore, Ritu and Dogan, Fulya and Bloom, Ira D.},
abstractNote = {Electrode cross-talk in lithium-ion batteries has been increasingly recognized in recent years as an explanation for several performance trends during cycling. However, little is known about the nature of such cross-talk species/reactions. In an attempt to further that understanding, we constructed a two-compartment lithium-ion cell using a solid-state lithium-ion conductor as the separator to block the movement of species generated at one electrode to the other. After a long-term hold at a high voltage, the electrolytes extracted from each side were analyzed via high-performance liquid chromatography coupled with electrospray ionization mass spectrometry and nuclear magnetic resonance spectroscopy. We compared these results with those from a coin cell made with a regular porous separator. Extra species were present in the coin cell, which were absent in both compartments of the two-compartment cell, and we identified them as cross-talk species. We propose chemical structures for such species and show that these species likely have carbon carbon double bonds and fluorinated carbons. Finally, we also confirm that the organophosphate-type species proposed by several groups previously are indeed generated at the anode.},
doi = {10.1021/acs.chemmater.9b00063},
journal = {Chemistry of Materials},
number = 8,
volume = 31,
place = {United States},
year = {2019},
month = {3}
}

Journal Article:
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This content will become publicly available on March 26, 2020
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