Systematic Study of Different Anion Doping on the Electrochemical Performance of Cobalt-Free Lithium–Manganese-Rich Layered Cathode
Abstract
Regardless of the appealingly high energy density (1000 Wh kg–1) of the lithium–manganese-rich layered oxide cathode (LMR-NMO), this material still suffers from rapid capacity and voltage decay after continuous cycling. LMR-NMO involves the redox reaction of both transition metals and oxygen to gain additional capacity in comparison with a conventional NMC cathode. Due to the use of a high voltage range (beyond 4.4 V), the oxygen release from the structure initiates and in turn generates intergranular cracks and spinel formation, consequently, into rock-salt structure. Here, LMR-NMO with different doping ranges (1–5 mol %) of F, S, and Cl are being examined to summarize the benefits and drawbacks of each anion. This study shows that F is the best candidate as it increases average voltage (voltage retention 96–97% after 200 cycles at 0.5 C), improves ionic conductivity (nearly two times higher than pristine), reduces cation mixing, minimizes oxygen release, and offers high stability during high temperature cycle. However, for S and Cl, the results are conflicted. An optimal amount of anion dopants should be considered as the side effects might overcome the benefits when the doping amount is excessive.
- Authors:
-
[1];
[1]
- Worcester Polytechnic Institute, MA (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1635474
- Report Number(s):
- BNL-216086-2020-JAAM
Journal ID: ISSN 2574-0962
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Applied Energy Materials
- Additional Journal Information:
- Journal Volume: 3; Journal Issue: 5; Journal ID: ISSN 2574-0962
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE
Citation Formats
Vanaphuti, Panawan, Bong, Sungyool, Ma, Lu, Ehrlich, Steven, and Wang, Yan. Systematic Study of Different Anion Doping on the Electrochemical Performance of Cobalt-Free Lithium–Manganese-Rich Layered Cathode. United States: N. p., 2020.
Web. doi:10.1021/acsaem.0c00439.
Vanaphuti, Panawan, Bong, Sungyool, Ma, Lu, Ehrlich, Steven, & Wang, Yan. Systematic Study of Different Anion Doping on the Electrochemical Performance of Cobalt-Free Lithium–Manganese-Rich Layered Cathode. United States. https://doi.org/10.1021/acsaem.0c00439
Vanaphuti, Panawan, Bong, Sungyool, Ma, Lu, Ehrlich, Steven, and Wang, Yan. Tue .
"Systematic Study of Different Anion Doping on the Electrochemical Performance of Cobalt-Free Lithium–Manganese-Rich Layered Cathode". United States. https://doi.org/10.1021/acsaem.0c00439. https://www.osti.gov/servlets/purl/1635474.
@article{osti_1635474,
title = {Systematic Study of Different Anion Doping on the Electrochemical Performance of Cobalt-Free Lithium–Manganese-Rich Layered Cathode},
author = {Vanaphuti, Panawan and Bong, Sungyool and Ma, Lu and Ehrlich, Steven and Wang, Yan},
abstractNote = {Regardless of the appealingly high energy density (1000 Wh kg–1) of the lithium–manganese-rich layered oxide cathode (LMR-NMO), this material still suffers from rapid capacity and voltage decay after continuous cycling. LMR-NMO involves the redox reaction of both transition metals and oxygen to gain additional capacity in comparison with a conventional NMC cathode. Due to the use of a high voltage range (beyond 4.4 V), the oxygen release from the structure initiates and in turn generates intergranular cracks and spinel formation, consequently, into rock-salt structure. Here, LMR-NMO with different doping ranges (1–5 mol %) of F, S, and Cl are being examined to summarize the benefits and drawbacks of each anion. This study shows that F is the best candidate as it increases average voltage (voltage retention 96–97% after 200 cycles at 0.5 C), improves ionic conductivity (nearly two times higher than pristine), reduces cation mixing, minimizes oxygen release, and offers high stability during high temperature cycle. However, for S and Cl, the results are conflicted. An optimal amount of anion dopants should be considered as the side effects might overcome the benefits when the doping amount is excessive.},
doi = {10.1021/acsaem.0c00439},
journal = {ACS Applied Energy Materials},
number = 5,
volume = 3,
place = {United States},
year = {Tue May 26 00:00:00 EDT 2020},
month = {Tue May 26 00:00:00 EDT 2020}
}
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