Journal Article

PUBDB-2019-00917

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Electrochemical and Thermal Stress of $\mathrm{LiNi_{0.8}Co_{0.15}Al_{0.05}O_{2}}$ Electrodes: Evolution of Aluminum Surface Environments

Lebens-Higgins, Z. ; Faenza, N. ; Mukherjee, P. ; Sallis, S. ; Badway, F. ; Pereira, N. ; Schlueter, C.DESY* ; Lee, T.-L.Extern* ; Cosandey, F. ; Amatucci, G. ; Piper, L. F. J. (Corresponding author)

2017
Pennington, NJ

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Please use a persistent id in citations: doi:10.1149/08010.0197ecst  doi:10.3204/PUBDB-2019-00917

Abstract: For layered oxide cathodes, aluminum doping has widely been shown to improve performance, particularly at high degrees of delithiation. While this has led to increased interest in Al-doped systems, including $\mathrm{LiNi_{0.8}Co_{0.15}Al_{0.05}O_{2}}$ (NCA), the aluminum surface environment has not been thoroughly investigated. Using hard x-ray photoelectron spectroscopy measurements of the Al 1s core region for NCA electrodes, we examined the evolution of the surface aluminum environment under electrochemical and thermal stress. By correlating the aluminum environment to transition metal reduction and electrolyte decomposition, we provide further insight into the cathode-electrolyte interface layer. A remarkable finding is that Al-O coatings in LiPF$_6$ electrolyte mimic the evolution observed for the aluminum surface environment in doped layered oxides.

Note: © ECS - The Electrochemical Society

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Contributing Institute(s):

1. PETRA III Extension (FS-PEX)

Research Program(s):

1. 6214 - Nanoscience and Materials for Information Technology (POF3-621) (POF3-621)

Experiment(s):

1. Measurement at external facility

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Database coverage:
; ; SCOPUS

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