Affiliation:
1. School of Advanced Materials Peking University Shenzhen Graduate School Shenzhen 518055 China
2. Nanofabrication Laboratory CAS Key Laboratory for Nanophotonic Materials and Devices National Center for Nanoscience and Technology Beijing 100190 China
3. Chemical Sciences and Engineering Division Argonne National Laboratory Lemont IL 60439 USA
4. The Institute of Technological Sciences MOE Key Laboratory of Hydrodynamic Transients Wuhan University Wuhan 430072 China
Abstract
AbstractNi‐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. 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.
Funder
China Postdoctoral Science Foundation
National Natural Science Foundation of China
Soft Science Research Project of Guangdong Province
Vehicle Technologies Office
Argonne National Laboratory
Office of Science
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
8 articles.
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