Journal Article

FZJ-2026-02160

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png On the Role of Reaction Current Distribution to Attain Competitive Solid‐State Batteries

Hartel, J. ; Ketter, L. ; Schlautmann, E. ; Šimon, E. ; Végsö, K. ; Ayyanusamy, P. ; Bernges, T. ; Siffalovic, P. (Corresponding author) ; Zeier, W. (Corresponding author)FZJ*

2026
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/anie.2890151

Abstract: Competitive solid-state batteries must allow for high areal loadings ($> 5 mAh⋅cm^{−2}$) and fast charging rates (> 2 C). Nevertheless,current academic research mainly focuses on systems with smaller loadings and lower C-rates. For established cell chemistries afocus shift is required when aiming toward practical application. Increasing the areal active material content and C-rates is oftenaccompanied by charge transport limitations in the electrodes. In this work, the role of reaction current distribution in compositeelectrodes is highlighted as solid-state batteries advance toward higher areal loadings and charging rates. Using NCM-argyrodite composites as a case study, we revisit Newman’s porous electrode theory in the context of solid-state batteries to rationalizecomposite electrode cycling performance. Further, operando high-energy X-ray diffraction is employed to track lithiation statesof NCM across the electrode as a function of state of charge. The results reveal significant improvements in reaction currentdistribution, when employing faster conducting $Li _{5.5} PS_{4.5} Cl_{1.5}$ instead of conventional $Li_6 PS_5 Cl$, underscoring the need for fastlithium-ion conductors to enable competitive solid-state batteries. This work demonstrates the importance of precisely controlling electrode composition to balance ionic and electronic transport, ensuring homogeneous utilization of the active material andmitigating local strain and overcharging.

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Contributing Institute(s):

1. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IMD-4)

Research Program(s):

1. 1222 - Components and Cells (POF4-122) (POF4-122)

Appears in the scientific report 2026

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Database coverage:
; Chemical Reactions ; Clarivate Analytics Master Journal List ; Current Contents - Life Sciences ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 15 ; Index Chemicus ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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