Journal Article

FZJ-2021-05737

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Formation of a Stable Solid-Electrolyte Interphase at Metallic Lithium Anodes Induced by LiNbO 3 Protective Layers

Jiang, M.FZJ* ; Zhang, Q.FZJ*RWTH* ; Danilov, D.FZJ* ; Eichel, R.-A.FZJ*RWTH* ; Notten, P. H. L. (Corresponding author)FZJ*

2021
ACS Publications Washington, DC

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Please use a persistent id in citations: http://hdl.handle.net/2128/29917  doi:10.1021/acsaem.1c02278

Abstract: The stability of solid-electrolyte interphase (SEI) surface films at Li-metal anodes is crucial for the safe and durable operation of lithium-metal batteries (LMBs). By combining Li-metal anodes with high-performance Ni-rich transition-metal oxide cathodes, LMBs can meet the goal of a high specific energy density of more than 500 Wh kg–1. However, Li-metal anodes suffer from serious problems, especially the nonuniform lithium deposition and uncontrollable SEI formation. In this work, Li-metal anodes were protected by thin-film LiNbO3 coatings. Full cells composed of protected Li-metal anodes and LiNi0.6Co0.2Mn0.2O2 cathodes were examined electrochemically and by physical characterization methods. Postmortem analyses of pristine and prolonged cycled Li-metal anodes were performed. The results revealed the formation of more stable SEI films at the protected Li-metal anodes in comparison to unprotected electrodes. Consequently, the LiNbO3 layers improved the cycle-life performance of Li-metal anodes in LMBs. Furthermore, X-ray photoelectron spectroscopy (XPS) analyses showed that the reduction of metallic ions stemming from the Ni-rich cathodes was also inhibited by the protective LiNbO3 layers, thereby further controlling the degradation of Li-metal anodes.

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Contributing Institute(s):

1. Grundlagen der Elektrochemie (IEK-9)

Research Program(s):

1. 1223 - Batteries in Application (POF4-122) (POF4-122)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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