Synthetic Control of Kinetic Reaction Pathway and Cationic Ordering in High-Ni Layered Oxide Cathodes
- Title
- Synthetic Control of Kinetic Reaction Pathway and Cationic Ordering in High-Ni Layered Oxide Cathodes
- Author
- 선양국
- Keywords
- cationic ordering; high-energy X-ray diffraction; layered oxide cathodes; lithium-ion batteries; X-ray absorption spectroscopy
- Issue Date
- 2017-08
- Publisher
- WILEY-V C H VERLAG GMBH
- Citation
- ADVANCED MATERIALS, v. 29, no. 39, Article no. 1606715
- Abstract
- Nickel-rich layered transition metal oxides, LiNi1-x(MnCo)(x)O-2 (1-x >= 0.5), are appealing candidates for cathodes in next-generation lithium-ion batteries (LIBs) for electric vehicles and other large-scale applications, due to their high capacity and low cost. However, synthetic control of the structural ordering in such a complex quaternary system has been a great challenge, especially in the presence of high Ni content. Herein, synthesis reactions for preparing layered LiNi0.7Mn0.15Co0.15O2 (NMC71515) by solid-state methods are investigated through a combination of time-resolved in situ high-energy X-ray diffraction and absorption spectroscopy measurements. The real-time observation reveals a strong temperature dependence of the kinetics of cationic ordering in NMC71515 as a result of thermal-driven oxidation of transition metals and lithium/oxygen loss that concomitantly occur during heat treatment. Through synthetic control of the kinetic reaction pathway, a layered NMC71515 with low cationic disordering and a high reversible capacity is prepared in air. The findings may help to pave the way for designing high-Ni layered oxide cathodes for LIBs.
- URI
- https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201606715https://repository.hanyang.ac.kr/handle/20.500.11754/115134
- ISSN
- 0935-9648; 1521-4095
- DOI
- 10.1002/adma.201606715
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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