Understanding cation doping achieved by atomic layer deposition for high-performance Li-Ion batteries

Yan Gao; Xiaoqing He; Lu Ma; Tianpin Wu; Jonghyun Park; Xinhua Liang

doi:10.1016/j.electacta.2020.135951

Understanding cation doping achieved by atomic layer deposition for high-performance Li-Ion batteries

Yan Gao
, Xiaoqing He
, Lu Ma
, Tianpin Wu
, Jonghyun Park
, Xinhua Liang

Department of Energy, Environmental & Chemical Engineering

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

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 (FeO_x) ALD was performed on LiMn_1·5Ni_0·5O₄ (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 °C under vacuum. Meanwhile, Fe diffused from the surface to the bulk of LMNO. After post-annealing, FeO_x-coated LMNO recovered its structure and lattice oxygen under proper annealing conditions, and exhibited significant enhancement of specific capacity, rate capability, and cyclic stability.

Original language	English
Article number	135951
Journal	Electrochimica Acta
Volume	340
DOIs	https://doi.org/10.1016/j.electacta.2020.135951
State	Published - Apr 20 2020

Keywords

Atomic layer deposition
Fe doping
LiMn·Ni·O (LMNO)
Post-annealing

Access to Document

10.1016/j.electacta.2020.135951

Cite this

@article{14d40ca61137488fbc8ca35985ad03a4,

title = "Understanding cation doping achieved by atomic layer deposition for high-performance Li-Ion batteries",

abstract = "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 LiMn1·5Ni0·5O4 (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 °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.",

keywords = "Atomic layer deposition, Fe doping, LiMn·Ni·O (LMNO), Post-annealing",

author = "Yan Gao and Xiaoqing He and Lu Ma and Tianpin Wu and Jonghyun Park and Xinhua Liang",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2020",

month = apr,

day = "20",

doi = "10.1016/j.electacta.2020.135951",

language = "English",

volume = "340",

journal = "Electrochimica Acta",

issn = "0013-4686",

}

TY - JOUR

T1 - Understanding cation doping achieved by atomic layer deposition for high-performance Li-Ion batteries

AU - Gao, Yan

AU - He, Xiaoqing

AU - Ma, Lu

AU - Wu, Tianpin

AU - Park, Jonghyun

AU - Liang, Xinhua

PY - 2020/4/20

Y1 - 2020/4/20

N2 - 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 LiMn1·5Ni0·5O4 (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 °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.

AB - 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 LiMn1·5Ni0·5O4 (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 °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.

KW - Atomic layer deposition

KW - Fe doping

KW - LiMn·Ni·O (LMNO)

KW - Post-annealing

UR - https://www.scopus.com/pages/publications/85081026150

U2 - 10.1016/j.electacta.2020.135951

DO - 10.1016/j.electacta.2020.135951

M3 - Article

AN - SCOPUS:85081026150

SN - 0013-4686

VL - 340

JO - Electrochimica Acta

JF - Electrochimica Acta

M1 - 135951

ER -

Understanding cation doping achieved by atomic layer deposition for high-performance Li-Ion batteries

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this