Journal Article

FZJ-2018-04824

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Lithium ion battery cells under abusive discharge conditions: Electrode potential development and interactions between positive and negative electrode

Kasnatscheew, J. (Corresponding author)FZJ* ; Börner, M. ; Streipert, B. ; Meister, P.FZJ* ; Wagner, R. ; Cekic Laskovic, I. ; Winter, M. (Corresponding author)FZJ*

2017
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.jpowsour.2017.07.044

Abstract: Increasing specific energy of lithium ion battery cells (LIBs) and their cycle life requires deeper understanding of complex processes taking place during the cell operation. This work focuses on the electrode potential development and the interactions between negative and positive electrode in a quasi LIB full cell by applying over-discharge conditions. By analysis of the potential profiles, a characteristic potential plateau at ≈ 3.56 V vs. Li/Li+ was detected at the graphite negative electrode, which can be assigned to the Cu oxidation process of the negative electrode current collector. Also at the positive electrode, a time shifted potential plateau was observed, which could be attributed to a competitive reaction between conventional discharge (lithiation) and parasitic Cu reduction (plating) on the positive electrode surface. The proposed mechanism involving the presence of elemental Cu on the positive electrode surface was confirmed by SEM-EDX mapping experiments. The relevance of Cu dissolution and deposition as well as possible solution approaches are discussed.

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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 2018

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Database coverage:
; 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 ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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