Insights into Li/Ni ordering and surface reconstruction during synthesis of Ni-rich layered oxides
- 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.
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.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Science (SC); Shenzhen Science and Technology
- Grant/Contract Number:
- SC0012704; JCYJ20150729111733470; JCYJ20151015162256516
- OSTI ID:
- 1492790
- Alternate ID(s):
- OSTI ID: 1485336
- Report Number(s):
- BNL-210927-2019-JAAM; JMCAET
- Journal Information:
- Journal of Materials Chemistry. A, Vol. 7, Issue 2; ISSN 2050-7488
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Surface/Interface Structure Degradation of Ni‐Rich Layered Oxide Cathodes toward Lithium‐Ion Batteries: Fundamental Mechanisms and Remedying Strategies
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journal | December 2019 |
Cooling Induced Surface Reconstruction during Synthesis of High‐Ni Layered Oxides
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journal | October 2019 |
Enhanced Electrochemical Properties of LiNi 0.8 Co 0.1 Mn 0.1 O 2 at Elevated Temperature by Simultaneous Structure and Interface Regulating
|
journal | January 2019 |
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