Nonflammable Lithium Metal Full Cells with Ultra-high Energy Density Based on Coordinated Carbonate Electrolytes
Abstract
Coupling thin Li metal anodes with high-capacity/high-voltage cathodes such as LiNi0.8Co0.1Mn0.1O2 (NCM811) is a promising way to increase lithium battery energy density. Yet, the realization of high-performance full cells remains a formidable challenge. Here, we demonstrate a new class of highly coordinated, nonflammable carbonate electrolytes based on lithium bis(fluorosulfonyl)imide (LiFSI) in propylene carbonate/fluoroethylene carbonate mixtures. Utilizing an optimal salt concentration (4 M LiFSI) of the electrolyte results in a unique coordination structure of Li+-FSI--solvent cluster, which is critical for enabling the formation of stable interfaces on both the thin Li metal anode and high-voltage NCM811 cathode. Under highly demanding cell configuration and operating conditions (Li metal anode = 35 μm, areal capacity/charge voltage of NCM811 cathode = 4.8 mAh cm-2/4.6 V, and anode excess capacity [relative to the cathode] = 0.83), the Li metal-based full cell provides exceptional electrochemical performance (energy densities = 679 Wh kgcell-1/1,024 Wh Lcell-1) coupled with nonflammability.
- Authors:
-
- Ulsan National Institute of Science and Technology, Ulsan (Korea, Republic of). School of Energy and Chemical Engineering. Dept. of Energy Engineering
- Army Research Lab., Adelphi, MD (United States). Sensor and Electron Devices Directorate. Energy and Biomaterials Division. Battery Science Branch
- LG Chem., Daejeon (Korea, Republic of). Battery R&D Center
- Publication Date:
- Research Org.:
- Army Research Lab., Adelphi, MD (United States). Sensor and Electron Devices Directorate. Energy and Biomaterials Division. Battery Science Branch
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1623688
- Grant/Contract Number:
- AC36-08GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- iScience
- Additional Journal Information:
- Journal Volume: 23; Journal Issue: 2; Journal ID: ISSN 2589-0042
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; Science & Technology - Other Topics
Citation Formats
Cho, Sung-Ju, Yu, Dae-Eun, Pollard, Travis P., Moon, Hyunseok, Jang, Minchul, Borodin, Oleg, and Lee, Sang-Young. Nonflammable Lithium Metal Full Cells with Ultra-high Energy Density Based on Coordinated Carbonate Electrolytes. United States: N. p., 2020.
Web. doi:10.1016/j.isci.2020.100844.
Cho, Sung-Ju, Yu, Dae-Eun, Pollard, Travis P., Moon, Hyunseok, Jang, Minchul, Borodin, Oleg, & Lee, Sang-Young. Nonflammable Lithium Metal Full Cells with Ultra-high Energy Density Based on Coordinated Carbonate Electrolytes. United States. https://doi.org/10.1016/j.isci.2020.100844
Cho, Sung-Ju, Yu, Dae-Eun, Pollard, Travis P., Moon, Hyunseok, Jang, Minchul, Borodin, Oleg, and Lee, Sang-Young. Sat .
"Nonflammable Lithium Metal Full Cells with Ultra-high Energy Density Based on Coordinated Carbonate Electrolytes". United States. https://doi.org/10.1016/j.isci.2020.100844. https://www.osti.gov/servlets/purl/1623688.
@article{osti_1623688,
title = {Nonflammable Lithium Metal Full Cells with Ultra-high Energy Density Based on Coordinated Carbonate Electrolytes},
author = {Cho, Sung-Ju and Yu, Dae-Eun and Pollard, Travis P. and Moon, Hyunseok and Jang, Minchul and Borodin, Oleg and Lee, Sang-Young},
abstractNote = {Coupling thin Li metal anodes with high-capacity/high-voltage cathodes such as LiNi0.8Co0.1Mn0.1O2 (NCM811) is a promising way to increase lithium battery energy density. Yet, the realization of high-performance full cells remains a formidable challenge. Here, we demonstrate a new class of highly coordinated, nonflammable carbonate electrolytes based on lithium bis(fluorosulfonyl)imide (LiFSI) in propylene carbonate/fluoroethylene carbonate mixtures. Utilizing an optimal salt concentration (4 M LiFSI) of the electrolyte results in a unique coordination structure of Li+-FSI--solvent cluster, which is critical for enabling the formation of stable interfaces on both the thin Li metal anode and high-voltage NCM811 cathode. Under highly demanding cell configuration and operating conditions (Li metal anode = 35 μm, areal capacity/charge voltage of NCM811 cathode = 4.8 mAh cm-2/4.6 V, and anode excess capacity [relative to the cathode] = 0.83), the Li metal-based full cell provides exceptional electrochemical performance (energy densities = 679 Wh kgcell-1/1,024 Wh Lcell-1) coupled with nonflammability.},
doi = {10.1016/j.isci.2020.100844},
journal = {iScience},
number = 2,
volume = 23,
place = {United States},
year = {2020},
month = {2}
}
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