Journal Article

PUBDB-2020-02382

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The effect of Sn substitution on the structure and oxygen activity of $Na_{0.67}Ni_{0.33}Mn_{0.67O2}$ cathode materials for sodium ion batteries

Li, J. (Corresponding author) ; Risthaus, T. (Corresponding author) ; Wang, J.Extern* ; Zhou, D.Extern* ; He, X.Extern*XFEL.EU* ; Ehteshami, N. ; Murzin, V.DESY* ; Friesen, A. ; Liu, H. ; Hou, X. ; Diehl, M. ; Paillard, E. ; Winter, M.Extern* ; Li, J.

2020
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.jpowsour.2019.227554

Abstract: A series of Na$_{0.67}$Ni$_{0.33}$Mn$_{0.67-x}$Sn$_x$O$_2$ (x = 0, 0.01, 0.03, 0.05) materials with mixed P2/P3 phases are synthesized with a conventional solid-state reaction method and investigated as cathode materials for sodium ion batteries. The effects of Sn substitution on the structure and electrochemical performance of the Na$_{0.67}$Ni$_{0.33}$Mn$_{0.67}$O$_2$ are systematically investigated. The substituted samples show smaller particle sizes compared to the pristine one and the P2:P3 phase ratio highly depends on the substitution amount. The best electrochemical performance is obtained by Na$_{0.67}$Ni$_{0.33}$Mn$_{0.66}$Sn$_{0.01}$O$_2$, and it delivers a discharge capacity of 245 mA h g$^{−1}$ in 1.5–4.5 V (vs. Na|Na$^+$), which is the highest result for Na$_{0.67}$Ni$_{0.33}$Mn$_{0.67}$O$_2$ materials reported so far. The ex situ X-ray absorption spectroscopy and X-ray photoelectron spectroscopy measurements reveal that the oxygen ions participate in the redox reactions within the wide voltage range of 1.5–4.5 V. The increased capacity can be attributed to the smaller particle size, which results in more oxygen activity and then higher capacity.

Note: © Published by Elsevier B.V.; Final published version in progress; Post referee fulltext in progress; Embargo 12 months from publication

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. Experimentebetreuung PETRA III (FS-PET-S)

Research Program(s):

1. 6213 - Materials and Processes for Energy and Transport Technologies (POF3-621) (POF3-621)
2. 6G3 - PETRA III (POF3-622) (POF3-622)

Experiment(s):

1. PETRA Beamline P64 (PETRA III)

Appears in the scientific report 2020

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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 ; Essential Science Indicators ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; No Fulltext ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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