期刊
ELECTROCHIMICA ACTA
卷 340, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2020.135951
关键词
Atomic layer deposition; Fe doping; LiMn1.Ni-5(0).O-5(4) (LMNO); Post-annealing
资金
- National Science Foundation, United States [NSF DMR 1464111, NSF CBET 1510085]
- US DOE [DE-AC02-06CH11357]
As Li ion battery (LIB) technology develops, its nanoscale design is attracting more and more interest. Atomic layer deposition (ALD) has emerged as a promising technique to provide conformal and ultrathin coating for LIB materials. In this work, an iron oxide (FeOx) ALD was performed on LiMn1.Ni-5(0).O-5(4) (LMNO) cathode particles, followed by an annealing process. Fe was doped into LMNO during the ALD process; and it was found that lattice oxygen loss and structural change of LMNO occurred at a reaction temperature of 450 degrees C under vacuum. Meanwhile, Fe diffused from the surface to the bulk of LMNO. After post-annealing, FeOx-coated LMNO recovered its structure and lattice oxygen under proper annealing conditions, and exhibited significant enhancement of specific capacity, rate capability, and cyclic stability. (C) 2020 Elsevier Ltd. All rights reserved.
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