Journal Article

FZJ-2024-02593

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Practical relevance of charge transfer resistance at the Li metal electrode|electrolyte interface in batteries?

Stolz, L. ; Winter, M.FZJ* ; Kasnatscheew, J. (Corresponding author)FZJ*

2025
Springer New York

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Please use a persistent id in citations: doi:10.1007/s10008-023-05792-4  doi:10.34734/FZJ-2024-02593

Abstract: The theoretically possible energy and power densities of rechargeable batteries are practically limited by resistances as these lead to overvoltages, particularly pronounced at kinetically harsher conditions, i.e., high currents and/or low temperature. Charge transfer resistance (Rct), being a major type of resistance alongside with Ohmic (RΩ) and mass transport (Rmt), is related with the activation hindrance of electrochemical reactions. Its practical relevance is discussed within this work via analyzing cells with the galvanostatic/constant current (CC) technique. Rct at Li|electrolyte interfaces is shown to be relevantly impacted by electrode–electrolyte interphases; implying the electrolyte type, as well. While solid polymer electrolytes (SPEs), e.g., based on poly(ethylene) oxide (PEO), show negligible Rct, it is evident for commercial liquid electrolytes and readily increase during storage. Given the asymptotic overvoltage vs. current behavior of Rct, obeying Butler-Volmer equation, Rct gets less relevant at enhanced currents, as experimentally validated, finally pointing to the dominance of RΩ and (depending on system) Rmt in the overall resistance.

Note: Unterstützt durch BMBF Grants: MEET Hi-End III (03XP0258A) und als Teil des ExcellBattMat Clusters.

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Contributing Institute(s):

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

Research Program(s):

1. 1221 - Fundamentals and Materials (POF4-122) (POF4-122)

Appears in the scientific report 2025

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

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