Imitating Architectural Mortise‐Tenon Structure for Stable Ni‐Rich Layered Cathodes
- Peking Univ., Beijing (China); National Center for Nanoscience and Technology, Beijing (China). CAS Key Laboratory for Nanophotonic Materials and Devices
- Peking Univ., Beijing (China)
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- National Center for Nanoscience and Technology, Beijing (China). CAS Key Laboratory for Nanophotonic Materials and Devices
- Wuhan Univ. (China)
Ni-rich layered oxides are the most promising cathodes for Li-ion batteries, but chemo-mechanical failures during cycling and large first-cycle capacity loss hinder their applications in high-energy batteries. Herein, by introducing spinel-like mortise-tenon structures into the layered phase of LiNi0.8Co0.1Mn0.1O2 (NCM811), the adverse volume variations in cathode materials can be significantly suppressed. Meanwhile, these mortise-tenon structures play the role of the expressway for fast lithium-ion transport, which is substantiated by experiments and calculations. Moreover, the particles with mortise-tenon structures usually terminate with the most stable (003) facet. The new cathode exhibits a discharge capacity of 215 mAh g–1 at 0.1 C with an initial Coulombic efficiency of 97.5%, and capacity retention of 82.2% after 1200 cycles at 1 C. Importantly, this work offers a viable lattice engineering to address the stability and low initial Coulombic efficiency of the Ni-rich layered oxides, and facilitates the implementation of Li-ion batteries with high-energy density and long durability.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 2217540
- Alternate ID(s):
- OSTI ID: 1994587
- Journal Information:
- Advanced Materials, Journal Name: Advanced Materials Journal Issue: 32 Vol. 35; ISSN 0935-9648
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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