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Title: Monitoring of CoS 2 reactions using high-temperature XRD coupled with gas chromatography (GC)

High-temperature X-ray diffraction with concurrent gas chromatography (GC) was used to study cobalt disulfide cathode pellets disassembled from thermal batteries. When CoS 2 cathode materials were analyzed in an air environment, oxidation of the K(Br, Cl) salt phase in the cathode led to the formation of K 2SO 4 that subsequently reacted with the pyrite-type CoS 2 phase leading to cathode decomposition between ~260 and 450 °C. Here, independent thermal analysis experiments, i.e. simultaneous thermogravimetric analysis/differential scanning calorimetry/mass spectrometry (MS), augmented the diffraction results and support the overall picture of CoS 2 decomposition. Both gas analysis measurements (i.e. GC and MS) from the independent experiments confirmed the formation of SO 2 off-gas species during breakdown of the CoS 2. In contrast, characterization of the same cathode material under inert conditions showed the presence of CoS 2 throughout the entire temperature range of analysis.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Report Number(s):
SAND-2017-0302J
Journal ID: ISSN 0885-7156; applab; 650344
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Powder Diffraction
Additional Journal Information:
Journal Volume: 31; Journal Issue: 02; Journal ID: ISSN 0885-7156
Publisher:
Cambridge University Press
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
OSTI Identifier:
1340273

Rodriguez, Mark A., Coker, Eric Nicholas, Griego, James J. M., Mowry, Curtis D., Pimentel, Adam S., and Anderson, Travis Mark. Monitoring of CoS2 reactions using high-temperature XRD coupled with gas chromatography (GC). United States: N. p., Web. doi:10.1017/s0885715616000166.
Rodriguez, Mark A., Coker, Eric Nicholas, Griego, James J. M., Mowry, Curtis D., Pimentel, Adam S., & Anderson, Travis Mark. Monitoring of CoS2 reactions using high-temperature XRD coupled with gas chromatography (GC). United States. doi:10.1017/s0885715616000166.
Rodriguez, Mark A., Coker, Eric Nicholas, Griego, James J. M., Mowry, Curtis D., Pimentel, Adam S., and Anderson, Travis Mark. 2016. "Monitoring of CoS2 reactions using high-temperature XRD coupled with gas chromatography (GC)". United States. doi:10.1017/s0885715616000166. https://www.osti.gov/servlets/purl/1340273.
@article{osti_1340273,
title = {Monitoring of CoS2 reactions using high-temperature XRD coupled with gas chromatography (GC)},
author = {Rodriguez, Mark A. and Coker, Eric Nicholas and Griego, James J. M. and Mowry, Curtis D. and Pimentel, Adam S. and Anderson, Travis Mark},
abstractNote = {High-temperature X-ray diffraction with concurrent gas chromatography (GC) was used to study cobalt disulfide cathode pellets disassembled from thermal batteries. When CoS2 cathode materials were analyzed in an air environment, oxidation of the K(Br, Cl) salt phase in the cathode led to the formation of K2SO4 that subsequently reacted with the pyrite-type CoS2 phase leading to cathode decomposition between ~260 and 450 °C. Here, independent thermal analysis experiments, i.e. simultaneous thermogravimetric analysis/differential scanning calorimetry/mass spectrometry (MS), augmented the diffraction results and support the overall picture of CoS2 decomposition. Both gas analysis measurements (i.e. GC and MS) from the independent experiments confirmed the formation of SO2 off-gas species during breakdown of the CoS2. In contrast, characterization of the same cathode material under inert conditions showed the presence of CoS2 throughout the entire temperature range of analysis.},
doi = {10.1017/s0885715616000166},
journal = {Powder Diffraction},
number = 02,
volume = 31,
place = {United States},
year = {2016},
month = {4}
}