Journal Article

FZJ-2021-01179

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Transient morphology of lithium anodes in batteries monitored by in operando pulse electron paramagnetic resonance

Szczuka, C. (Corresponding author)FZJ*RWTH* ; Ackermann, J.FZJ*RWTH* ; Schleker, P. P. M.FZJ* ; Jakes, P.FZJ* ; Eichel, R.-A.FZJ*RWTH* ; Granwehr, J.FZJ*RWTH*

2021
Springer Nature London

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Please use a persistent id in citations: http://hdl.handle.net/2128/27256  doi:10.1038/s43246-021-00126-1

Abstract: Enhancing lithium-ion battery technology in terms of specific capacity and charging time is key for the advancement of the electrification of transportation. Particularly for fast charging, inhomogeneous deposition of metallic lithium, for example on commercial graphite or metallic lithium anodes, leads to cell degradation and safety issues. To understand the underlying mechanisms and develop counter-measures, non-invasive online detection techniques providing satisfactory time resolution are crucial. Here, we demonstrate in operando pulse electron paramagnetic resonance to observe transient processes during pulsed fast charging in cells with metallic lithium anodes. Sampling timescales of 100 ms enable real-time monitoring of the formation and evolution of porous lithium during and after charging pulses. It was observed that the generated morphology continued to evolve after the end of a charging pulse, whereby surface features were fusing with a time constant that was slower than their formation.

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Contributing Institute(s):

1. Grundlagen der Elektrochemie (IEK-9)

Research Program(s):

1. 122 - Elektrochemische Energiespeicherung (POF4-122) (POF4-122)
2. HITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406) (HITEC-20170406)

Appears in the scientific report 2021

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