Fe Doping in LiMn₁.₅Ni₀.₅O₄ by Atomic Layer Deposition Followed by Annealing: Depths and Occupation Sites

Abstract

The development of high-voltage cathodes is very important to meet the pursuit of high energy and power density for next-generation lithium-ion batteries. LiMn1.5Ni0.5O4 (LMNO), as one of the most promising high-voltage cathodes, is still challenged by unstable surface chemistry, metal dissolution, and structure transition during charge/discharge cycling. In this work, a porous structure combined with Fe doping in LMNO was achieved by iron oxide (FeOx) atomic layer deposition (ALD) and postannealing. The formation of the porous structure was closely related to FeOx ALD, and the sites of Fe doping in LMNO spinel were also controlled by annealing temperature. After this modification, Li+ transport and cycling stability were both significantly improved.

Department(s)

Chemistry

Second Department

Mechanical and Aerospace Engineering

Third Department

Chemical and Biochemical Engineering

Research Center/Lab(s)

Center for High Performance Computing Research

Second Research Center/Lab

Intelligent Systems Center

Keywords and Phrases

Luminescence; Electrodes; Electrochemical cells; Atomic layer deposition; Doping

International Standard Serial Number (ISSN)

1932-7447

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2021 American Chemical Society (ACS), All rights reserved.

Publication Date

15 Apr 2021

Link to Full Text

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