Journal Article

FZJ-2019-05227

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Comparative study of Sn-doped Li[Ni0.6Mn0.2Co0.2-Sn ]O2 cathode active materials (x = 0-0.5) for lithium ion batteries regarding electrochemical performance and structural stability

Eilers-Rethwisch, M. ; Hildebrand, S. ; Evertz, M. ; Ibing, L. ; Dagger, T. ; Winter, M. (Corresponding author)FZJ* ; Schappacher, F. M. (Corresponding author)

2018
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.jpowsour.2018.06.072

Abstract: Layered Ni-rich Li[Ni0.6Mn0.2Co0.2-xSnx]O2 cathode active materials with x = 0–0.05 are synthesized via a co-precipitation synthesis route and the effect of doping content on the structural behavior and electrochemical performance are investigated. All synthesized materials show a well-defined layered structure of the hexagonal α-NaFeO2 phase (space group Rm) analyzed by X-ray diffraction (XRD). Electrochemical Li-metal/cathode cell studies exhibit that a Sn-content of 1%–2% is beneficial regarding specific discharge capacity and cycle life (≥20%). Detailed electrochemical investigations of Li-metal and lithium ion cells with cathodes consisting of LiNi0.6Mn0.2Co0.2O2 and LiNi0.6Mn0.2Co0.18Sn0.02O2 are conducted. Post mortem analyses by means of ICP-OES and TXRF show beneficial effects of the Sn-doping with regard to a lower transition metal dissolution and a higher available Li content in the cathode active material. The thermal analyses (TGA, DSC, ARC) show a stabilizing effect of Sn-doping, which results from a lower mass loss and less heat evolution of the charged cathode active materials at elevated temperatures.

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Contributing Institute(s):

1. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IEK-12)

Research Program(s):

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

Appears in the scientific report 2019

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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 ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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