Journal Article

FZJ-2024-02613

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Multiple protective layers for suppressing Li dendrite growth and improving the cycle life of anode-free lithium metal batteries

Merso, S. K. ; Tekaligne, T. M. ; Adigo Weret, M. ; Shitaw, K. N. ; Nikodimos, Y. ; Yang, S.-C. ; Muche, Z. B. ; Taklu, B. W. ; Hotasi, B. T. ; Chang, C.-Y. ; Jiang, S.-K. ; Brunklaus, G.FZJ* ; Winter, M.FZJ* ; Wu, S.-H. ; Su, W.-N. ; Mou, C.-Y. ; Hwang, B. J. (Corresponding author)

2024
Elsevier Amsterdam

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Please use a persistent id in citations: doi:10.1016/j.cej.2024.149547

Abstract: Anode-free lithium metal batteries (AFLMBs) have sparked considerable attention in recent years because of their potential for high energy density; however, they suffer from severe Li dendrite growth and unstable solid electrolyte interphase (SEI), which typically result in rapid capacity decay. Herein, we demonstrate a long-life anode-free pouch cell by designing a dual-coating protective layer (Cu-Sn@SFPH) electrode with Sn-coated Cu (denoted as Cu-Sn) as the bottom layer and SrF2 nanoparticles strengthened by poly (vinylidene fluoride)-co-hexafluoropropylene (PVDF-HFP) as the top layer. The in-situ formed LiF-rich SEI enables fast Li+ transfer, while the lithiophilic Li-Sn and Li-Sr alloy layers serve as nucleation seeds for uniform Li deposition. The dual-coated Cu electrode in the Cu-Sn@SFPH||Li cell exhibits remarkable cycling stability for more than 3,200 h at a capacity of 2 mAh cm−2. The NCM111||Cu-Sn@SFPH pouch cell demonstrates outstanding performance with a capacity retention of 72.1 % and an average Coulombic efficiency (CE) of 99.9 % for 120 cycles. Under practical conditions, with NCM cathodes and a lean electrolyte volume, this design strategy opens a new approach to AFLMBs.

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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)
2. LiBEST2 - Lithium-Batterie-Konzepte mit hoher Energiedichte, Leistung und Sicherheit (13XP0304A) (13XP0304A)

Appears in the scientific report 2024

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Database coverage:
; BIOSIS Previews ; Biological Abstracts ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 15 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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