Insights into Li/Ni ordering and surface reconstruction during synthesis of Ni-rich layered oxides
Abstract
Nickel-rich layered transition metal oxides (NMCs) have been intensively studied as promising cathode candidates for next-generation Li-ion batteries, known for low cost and high theoretical capacity. However, the practical capacity of NMCs is largely determined by cationic ordering and has yet to be well controlled during synthesis, largely due to the complexity and non-equilibrium nature of the reactions occurring in the sintering process. In this work, high-energy synchrotron X-ray diffraction is employed to investigate the kinetic and thermodynamic aspects of cationic ordering during synthesis of LiNi0.7Mn0.15Co0.15O2 (NMC71515). It is found that cationic ordering in the bulk is coupled to surface reconstruction during synthesis, occurring concomitantly and both being greatly affected by Li2CO3 decomposition and Li loss at the particle surface. Through tuning the sintering temperature and time, highly ordered NMC71515 with high capacity and excellent rate capability is synthesized. The developed approach may be applied broadly to the synthesis of high-performance Ni-rich NMC and other cathode materials.
- Authors:
-
- Peking Univ., Shenzhen (China). Shenzhen Graduate School, School of Advanced Materials; Brookhaven National Lab. (BNL), Upton, NY (United States). Sustainable Energy Technologies Dept.
- Peking Univ., Shenzhen (China). Shenzhen Graduate School, School of Advanced Materials
- Argonne National Lab. (ANL), Argonne, IL (United States). Electrochemical Technology Program, Chemical Sciences and Engineering Division
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
- Brookhaven National Lab. (BNL), Upton, NY (United States). Sustainable Energy Technologies Dept.
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Science (SC); Shenzhen Science and Technology
- OSTI Identifier:
- 1492790
- Alternate Identifier(s):
- OSTI ID: 1485336
- Report Number(s):
- BNL-210927-2019-JAAM
Journal ID: ISSN 2050-7488; JMCAET
- Grant/Contract Number:
- SC0012704; JCYJ20150729111733470; JCYJ20151015162256516
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Materials Chemistry. A
- Additional Journal Information:
- Journal Volume: 7; Journal Issue: 2; Journal ID: ISSN 2050-7488
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; 36 MATERIALS SCIENCE
Citation Formats
Duan, Yandong, Yang, Luyi, Zhang, Ming-Jian, Chen, Zonghai, Bai, Jianming, Amine, Khalil, Pan, Feng, and Wang, Feng. Insights into Li/Ni ordering and surface reconstruction during synthesis of Ni-rich layered oxides. United States: N. p., 2018.
Web. doi:10.1039/C8TA10553G.
Duan, Yandong, Yang, Luyi, Zhang, Ming-Jian, Chen, Zonghai, Bai, Jianming, Amine, Khalil, Pan, Feng, & Wang, Feng. Insights into Li/Ni ordering and surface reconstruction during synthesis of Ni-rich layered oxides. United States. https://doi.org/10.1039/C8TA10553G
Duan, Yandong, Yang, Luyi, Zhang, Ming-Jian, Chen, Zonghai, Bai, Jianming, Amine, Khalil, Pan, Feng, and Wang, Feng. Tue .
"Insights into Li/Ni ordering and surface reconstruction during synthesis of Ni-rich layered oxides". United States. https://doi.org/10.1039/C8TA10553G. https://www.osti.gov/servlets/purl/1492790.
@article{osti_1492790,
title = {Insights into Li/Ni ordering and surface reconstruction during synthesis of Ni-rich layered oxides},
author = {Duan, Yandong and Yang, Luyi and Zhang, Ming-Jian and Chen, Zonghai and Bai, Jianming and Amine, Khalil and Pan, Feng and Wang, Feng},
abstractNote = {Nickel-rich layered transition metal oxides (NMCs) have been intensively studied as promising cathode candidates for next-generation Li-ion batteries, known for low cost and high theoretical capacity. However, the practical capacity of NMCs is largely determined by cationic ordering and has yet to be well controlled during synthesis, largely due to the complexity and non-equilibrium nature of the reactions occurring in the sintering process. In this work, high-energy synchrotron X-ray diffraction is employed to investigate the kinetic and thermodynamic aspects of cationic ordering during synthesis of LiNi0.7Mn0.15Co0.15O2 (NMC71515). It is found that cationic ordering in the bulk is coupled to surface reconstruction during synthesis, occurring concomitantly and both being greatly affected by Li2CO3 decomposition and Li loss at the particle surface. Through tuning the sintering temperature and time, highly ordered NMC71515 with high capacity and excellent rate capability is synthesized. The developed approach may be applied broadly to the synthesis of high-performance Ni-rich NMC and other cathode materials.},
doi = {10.1039/C8TA10553G},
journal = {Journal of Materials Chemistry. A},
number = 2,
volume = 7,
place = {United States},
year = {Tue Dec 04 00:00:00 EST 2018},
month = {Tue Dec 04 00:00:00 EST 2018}
}
Web of Science
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Works referencing / citing this record:
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