Thermal stability in the blended lithium manganese oxide – Lithium nickel cobalt manganese oxide cathode materials: An in situ time-resolved X-Ray diffraction and mass spectroscopy study
Abstract
Thermal stabilities of a series of blended LiMn2O4(LMO)-LiNi1/3Co1/3Mn1/3O2 (NCM) cathode materials with different weight ratios were studied by in situ time-resolved X-ray diffraction (XRD) combined with mass spectroscopy in the temperature range of 25°C-580°C under helium atmosphere. Upon heating, the electrochemically delithiated LMO changed into Mn3O4 phase at around 250°C. Formation of MnO with rocksalt structure started at 520°C. This observation is in contrast to the previous report for chemically delithiate LMO in air, in which a process of λ-MnO2 transforming to β-MnO2 was observed. Oxygen peak was not observed in all cases, presumably as a result of either consumption by the carbon or detection limit. CO2 profile correlates well with the phase transition and indirectly suggests the oxygen release of the cathode. Introducing NCM into LMO has two effects: first, it makes the high temperature rock-salt phase formation more complicated with more peaks in CO2 profile due to different MO (M = Ni, Mn, Co) phases; secondly, the onset temperature of CO2 release is lowered, implying lowered oxygen release temperature. Upon heating, XRD patterns indicate the NCM part reacts first, followed by the LMO part. This confirms the better thermal stability of LMO over NCM.
- Authors:
-
[2];
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Dongguk Univ., Seoul (Korea, Republic of). Dept. of Energy and Materials Engineering
- Hong Kong Univ. of Science and Technology, Clear Water Bay (Hong Kong)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1165964
- Alternate Identifier(s):
- OSTI ID: 1249902
- Report Number(s):
- BNL-107203-2014-JA; BNL-107203-2014-JAAM
Journal ID: ISSN 0378-7753; VT1201000-05450-1005554
- Grant/Contract Number:
- 20142020103090
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Power Sources
- Additional Journal Information:
- Journal Volume: 277; Journal Issue: C; Journal ID: ISSN 0378-7753
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE
Citation Formats
Hu, Enyuan, Bak, Seong Min, Senanayake, Sanjaya D., Yang, Xiao-Qing, Nam, Kyung-Wan, Zhang, Lulu, and Shao, Minhua. Thermal stability in the blended lithium manganese oxide – Lithium nickel cobalt manganese oxide cathode materials: An in situ time-resolved X-Ray diffraction and mass spectroscopy study. United States: N. p., 2015.
Web. doi:10.1016/j.jpowsour.2014.12.015.
Hu, Enyuan, Bak, Seong Min, Senanayake, Sanjaya D., Yang, Xiao-Qing, Nam, Kyung-Wan, Zhang, Lulu, & Shao, Minhua. Thermal stability in the blended lithium manganese oxide – Lithium nickel cobalt manganese oxide cathode materials: An in situ time-resolved X-Ray diffraction and mass spectroscopy study. United States. https://doi.org/10.1016/j.jpowsour.2014.12.015
Hu, Enyuan, Bak, Seong Min, Senanayake, Sanjaya D., Yang, Xiao-Qing, Nam, Kyung-Wan, Zhang, Lulu, and Shao, Minhua. Sun .
"Thermal stability in the blended lithium manganese oxide – Lithium nickel cobalt manganese oxide cathode materials: An in situ time-resolved X-Ray diffraction and mass spectroscopy study". United States. https://doi.org/10.1016/j.jpowsour.2014.12.015. https://www.osti.gov/servlets/purl/1165964.
@article{osti_1165964,
title = {Thermal stability in the blended lithium manganese oxide – Lithium nickel cobalt manganese oxide cathode materials: An in situ time-resolved X-Ray diffraction and mass spectroscopy study},
author = {Hu, Enyuan and Bak, Seong Min and Senanayake, Sanjaya D. and Yang, Xiao-Qing and Nam, Kyung-Wan and Zhang, Lulu and Shao, Minhua},
abstractNote = {Thermal stabilities of a series of blended LiMn2O4(LMO)-LiNi1/3Co1/3Mn1/3O2 (NCM) cathode materials with different weight ratios were studied by in situ time-resolved X-ray diffraction (XRD) combined with mass spectroscopy in the temperature range of 25°C-580°C under helium atmosphere. Upon heating, the electrochemically delithiated LMO changed into Mn3O4 phase at around 250°C. Formation of MnO with rocksalt structure started at 520°C. This observation is in contrast to the previous report for chemically delithiate LMO in air, in which a process of λ-MnO2 transforming to β-MnO2 was observed. Oxygen peak was not observed in all cases, presumably as a result of either consumption by the carbon or detection limit. CO2 profile correlates well with the phase transition and indirectly suggests the oxygen release of the cathode. Introducing NCM into LMO has two effects: first, it makes the high temperature rock-salt phase formation more complicated with more peaks in CO2 profile due to different MO (M = Ni, Mn, Co) phases; secondly, the onset temperature of CO2 release is lowered, implying lowered oxygen release temperature. Upon heating, XRD patterns indicate the NCM part reacts first, followed by the LMO part. This confirms the better thermal stability of LMO over NCM.},
doi = {10.1016/j.jpowsour.2014.12.015},
journal = {Journal of Power Sources},
number = C,
volume = 277,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 2015},
month = {Sun Mar 01 00:00:00 EST 2015}
}
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