Journal
JOURNAL OF ENERGY CHEMISTRY
Volume 71, Issue -, Pages 588-594Publisher
ELSEVIER
DOI: 10.1016/j.jechem.2022.04.037
Keywords
B-doped and La4NiLiO8-coated; Nickel-rich layered cathode; Cycle stability; Lithium-ion battery
Funding
- National Natural Science Foundation of China [51774051, 52072323, 52122211]
- Science and Technology Planning Project of Hunan Province [2019RS2034]
- Hunan High-tech Industry Science and Technol-ogy Innovation Leading Plan [2020GK2072]
- Changsha City Fund for Distinguished and Innovative Young Scholars [KQ1707014]
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Ni-rich layered oxides are promising cathodes for advanced lithium-ion batteries, but their structural and interfacial stability issues hinder practical application. In this study, a B-doped and La4NiLiO8-coated LiNi0.825Co0.115Mn0.06O2 cathode was synthesized using a one-step method, and the dual-modification strategy significantly improved the stability of the structure and interface, leading to excellent cycling performance.
Ni-rich layered oxides are considered promising cathodes for advanced lithium-ion batteries (LIBs) in the future, owing to their high capacity and low cost. However, the issues on structural and interfacial stability of Ni-rich cathodes still pose substantial obstacles in the practical application of advanced LIBs. Here, we employ a one-step method to synthesize a B-doped and La4NiLiO8-coated LiNi0.825Co0.115Mn0.06O2 (BL-1) cathode with reliable structure and interface, for the first time. The (LaNiLiO8)-Ni-4 coating layer can prevent cathodes from electrolyte assault and facilitate Li+ diffusion kinetics. Moreover, B-doping can effectively restrain the pernicious H2-H3 phase transition and adjust the orientation of primary particles to a radial alignment, which is obstructive to the arise of microcracks induced by the change of anisotropic volume. Specifically, when tested in pouch cells, the BL-1cathode exhibits outstanding capacity retention of 93.49% after 500 cycles at 1C. This dual-modification strategy dramatically enhances the stability of the structure and interface for Ni-rich cathode materials, consequently accelerating the commercialization process of high-energy-density LIBs.(C) 2022 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.
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