Journal Article

FZJ-2016-01871

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Radio frequency magnetron sputtering of Li7La3Zr2O12 thin films for solid-state batteries

Lobe, S. (Corresponding author)FZJ* ; Dellen, C.FZJ* ; Finsterbusch, M.FZJ* ; Gehrke, H.-G.FZJ* ; Sebold, D.FZJ* ; Tsai, C.-L.FZJ* ; Uhlenbruck, S.FZJ* ; Guillon, O.FZJ*

2016
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/9991  doi:10.1016/j.jpowsour.2015.12.054

Abstract: Thin film batteries based on solid electrolytes having a garnet-structure like Li7La3Zr2O12 (LLZ) are considered as one option for safer batteries with increased power density. In this work we show the deposition of Ta- and Al-substituted LLZ thin films on stainless steel substrates by r.f. magnetron sputtering. The thin films were characterized by XRD, SEM and time-of-flight-secondary ion mass spectrometry (ToF-SIMS) to determine crystal structure, morphology and element distribution. The substrate temperature was identified to be one important parameter for the formation of cubic garnet-structured LLZ thin films. LLZ formation starts at around 650 °C. Single phase cubic thin films were obtained at substrate temperatures of 700 °C and higher. At these temperatures an interlayer is formed. Combination of SEM, ToF-SIMS and XRD indicated that this layer consists of γ-LiAlO2. The combined total ionic conductivity of the γ-LiAlO2 interlayer and the LLZ thin film (perpendicular to the plane) was determined to be 2.0 × 10−9 S cm−1 for the sample deposited at 700 °C. In-plane measurements showed a room temperature conductivity of 1.2 × 10−4 S cm−1 with an activation energy of 0.47 eV for the LLZ thin film.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)
2. JARA-ENERGY (JARA-ENERGY)

Research Program(s):

1. 131 - Electrochemical Storage (POF3-131) (POF3-131)
2. HITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406) (HITEC-20170406)

Appears in the scientific report 2016

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Database coverage:
; ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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