Journal Article

FZJ-2018-06872

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png In-operando photoelectron spectroscopy for batteries: Set-up using pristine thin film cathode and first results on Na x CoO 2

Guhl, C. (Corresponding author)Extern* ; Kehne, P. ; Ma, Q.FZJ* ; Tietz, F.FZJ* ; Alff, L. ; Komissinskiy, P. ; Jaegermann, W. ; Hausbrand, R.

2018
American Institute of Physics [S.l.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/21305  doi:10.1063/1.5022616

Abstract: A model all-solid-state battery cell with a thin film NaxCoO2 cathode was assembled under ultra-high vacuum conditions and cycled inside the vacuum chamber, using a dedicated sample holder. We present in-operando x-ray photoelectron spectroscopy measurements of a NaxCoO2 cathode at different charging states. During battery operation, the change in sodium content, the change in cobalt oxidation state, and the evolution of the O1s and VB emissions could be monitored. Comparison with a conventional post-mortem analysis technique showed that the new measurement technique produces comparable results regarding the oxidation state of the transition metal, but sodium and oxygen results show differences due to cathode/electrolyte interfacial reactions for conventional analysis. By using surface layer-free samples in the presented techniques, we could circumvent such reactions and obtain reliable spectra for the pure bulk-like active cathode material.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)

Research Program(s):

1. 131 - Electrochemical Storage (POF3-131) (POF3-131)

Appears in the scientific report 2018

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; National-Konsortium ; Nationallizenz ; PubMed Central ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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