Journal Article

FZJ-2022-04707

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Tape-cast Ce-substituted Li 7 La 3 Zr 2 O 12 electrolyte for improving electrochemical performance of solid-state lithium batteries

Rath, P. C. ; Jheng, Y.-S. ; Chen, C.-C. ; Tsai, C.-L.FZJ* ; Su, Y.-S. ; Yang, C.-C. ; Eichel, R.-A.FZJ*RWTH* ; Hsieh, C.-T. ; Lee, T.-C. ; Chang, J.-K. (Corresponding author)

2022
RSC London ˜[u.a.]œ

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Please use a persistent id in citations: http://hdl.handle.net/2128/32906  doi:10.1039/D2TA06808G

Abstract: Solid-state lithium-metal batteries (SSLMBs) with a composite solid electrolyte (CSE) have great potential forachieving both high energy density and high safety and are thus promising next-generation energy storagedevices. The current bottlenecks are a high electrode/electrolyte interface resistance and the limited Li+conductivity of the solid electrolyte layer. To reduce the interface resistance, a tape casting method isused to directly deposit a CSE layer (20 mm) onto a model LiFePO4 cathode. The CSE slurry infiltratesthe cathode layer, forming a Li+ conduction network and ensuring intimate contact between the CSEand the cathode. The tape casting parameters, such as the polymer/Li salt ratio, inorganic filler fraction,and casting thickness, for the CSE layer are investigated. To increase Li+ conductivity, Ce substitution isconducted for Li7 La3Zr2−xCexO 12, x ¼ 0–0.15. The effects of Ce content on the specific capacity, ratecapability, and cycling stability of Li//CSE//LiFePO4 cells are systematically studied. Li 7 La3Zr1.9 Ce0.1O 12(i.e., x ¼ 0.1) is found to be the optimal composition; it outperforms Li7 La3Zr2O 12 andLi 6.25Ga0.25 La3Zr2O12 in terms of CSE conductivity and SSLMB charge–discharge performance.

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Contributing Institute(s):

1. Grundlagen der Elektrochemie (IEK-9)

Research Program(s):

1. 1223 - Batteries in Application (POF4-122) (POF4-122)

Appears in the scientific report 2022

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 10 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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