Probing Thermal Stability of Li-Ion Battery Ni-Rich Layered Oxide Cathodes by means of Operando Gas Analysis and Neutron Diffraction
Abstract
Thermal stability is a crucial parameter that must be considered within the overall performance metrics of Ni-rich layered oxide cathodes. While the intrinsic structural stability of the cathode materials under thermal conditions is important, it is also critical to consider their reaction with electrolytes. In this paper, operando gas analysis, ex situ neutron diffraction, and differential scanning calorimetry were combined to give a broader picture of the thermal stability of Ni-rich NMC cathodes. Li1-xNi0.8Mn0.1Co0.1O2 (NMC811) composite materials with four different states of charge were investigated with and without the presence of an electrolyte. It has been found that electrolyte can greatly accelerate both the structural and thermal decomposition of the cathode materials. A higher state of charge will also make cathode materials more susceptible to thermal shock. Without an electrolyte, O-2 release inducing a structural change from layered to rock salt was the major observation during thermal runaway. However, all samples retained some levels of layered structure after annealing up to 300 degrees C without the electrolyte. In comparison, almost all the O3-type layered phase transformed to the rock-salt phase for the cathode materials heated with the electrolyte at the same experimental conditions. Moreover, the amount of CO2 increased bymore »
- Authors:
-
[1];
[2];
[3];
[4];
[1];
[1];
[3]
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Energy & Transportation Sciences Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Energy & Transportation Sciences Division; Univ. of Tennessee, Knoxville, TN (United States). Bredesen Center for Interdisciplinary Research and Graduate Education
- Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
- OSTI Identifier:
- 1649269
- Alternate Identifier(s):
- OSTI ID: 1706168
- Grant/Contract Number:
- AC05-00OR22725; AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Applied Energy Materials
- Additional Journal Information:
- Journal Volume: 3; Journal Issue: 7; Journal ID: ISSN 2574-0962
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; Ni-rich NMC; lithium-ion batteries; thermal stability; neutron diffraction; operando gas analysis
Citation Formats
Geng, Linxiao, Liu, Jue, Wood, David L., Qin, Yan, Lu, Wenquan, Jafta, Charl J., Bai, Yaocai, and Belharouak, Ilias. Probing Thermal Stability of Li-Ion Battery Ni-Rich Layered Oxide Cathodes by means of Operando Gas Analysis and Neutron Diffraction. United States: N. p., 2020.
Web. doi:10.1021/acsaem.0c01105.
Geng, Linxiao, Liu, Jue, Wood, David L., Qin, Yan, Lu, Wenquan, Jafta, Charl J., Bai, Yaocai, & Belharouak, Ilias. Probing Thermal Stability of Li-Ion Battery Ni-Rich Layered Oxide Cathodes by means of Operando Gas Analysis and Neutron Diffraction. United States. https://doi.org/10.1021/acsaem.0c01105
Geng, Linxiao, Liu, Jue, Wood, David L., Qin, Yan, Lu, Wenquan, Jafta, Charl J., Bai, Yaocai, and Belharouak, Ilias. Tue .
"Probing Thermal Stability of Li-Ion Battery Ni-Rich Layered Oxide Cathodes by means of Operando Gas Analysis and Neutron Diffraction". United States. https://doi.org/10.1021/acsaem.0c01105. https://www.osti.gov/servlets/purl/1649269.
@article{osti_1649269,
title = {Probing Thermal Stability of Li-Ion Battery Ni-Rich Layered Oxide Cathodes by means of Operando Gas Analysis and Neutron Diffraction},
author = {Geng, Linxiao and Liu, Jue and Wood, David L. and Qin, Yan and Lu, Wenquan and Jafta, Charl J. and Bai, Yaocai and Belharouak, Ilias},
abstractNote = {Thermal stability is a crucial parameter that must be considered within the overall performance metrics of Ni-rich layered oxide cathodes. While the intrinsic structural stability of the cathode materials under thermal conditions is important, it is also critical to consider their reaction with electrolytes. In this paper, operando gas analysis, ex situ neutron diffraction, and differential scanning calorimetry were combined to give a broader picture of the thermal stability of Ni-rich NMC cathodes. Li1-xNi0.8Mn0.1Co0.1O2 (NMC811) composite materials with four different states of charge were investigated with and without the presence of an electrolyte. It has been found that electrolyte can greatly accelerate both the structural and thermal decomposition of the cathode materials. A higher state of charge will also make cathode materials more susceptible to thermal shock. Without an electrolyte, O-2 release inducing a structural change from layered to rock salt was the major observation during thermal runaway. However, all samples retained some levels of layered structure after annealing up to 300 degrees C without the electrolyte. In comparison, almost all the O3-type layered phase transformed to the rock-salt phase for the cathode materials heated with the electrolyte at the same experimental conditions. Moreover, the amount of CO2 increased by nearly two orders of magnitude when annealing cathode materials with electrolyte in operando gas analysis experiments. More delithiated NMC811 samples released larger amounts of CO2 at earlier onset temperatures, resonating well with the differential scanning calorimetry (DSC) results showing that more delithiated samples release more heat during thermal shock.},
doi = {10.1021/acsaem.0c01105},
journal = {ACS Applied Energy Materials},
number = 7,
volume = 3,
place = {United States},
year = {Tue Jun 30 00:00:00 EDT 2020},
month = {Tue Jun 30 00:00:00 EDT 2020}
}
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