Journal Article

FZJ-2019-00753

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Sol Gel vs Solid State Synthesis of the Fast Lithium-Ion Conducting Solid State Electrolyte Li 7 La 3 Zr 2 O 12 Substituted with Iron

Paulus, A. (Corresponding author)FZJ*RWTH* ; Kammler, S.FZJ*RWTH* ; Heuer, S.FZJ*RWTH* ; Paulus, M.FZJ*RWTH* ; Jakes, P.FZJ* ; Granwehr, J.FZJ*RWTH* ; Eichel, R.-A.FZJ*RWTH*

2019
Electrochemical Soc. Pennington, NJ

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Please use a persistent id in citations: http://hdl.handle.net/2128/21384  doi:10.1149/2.0641903jes

Abstract: Two calcined products of Li6.4Fe0.2La3Zr2O12 can be synthesized via the solid state method and the sol gel method. Inhomogeneities of the iron distribution in the powder for the solid state method lead to a combination of cubic and tetragonal structure. By using the sol gel method the homogeneity can significantly been increased resulting in the desired pure phase cubic structured powders in I4¯3d. By in situ dilatometer measurements the densification process can be comprehended for the first time for garnet type materials. The density can be significantly increased by the usage of the sol gel synthesis compared to the solid state synthesis with short sintering times of 2 h delivering pure phase pellets for both synthesis methods. Electrical impedance measurements revealed clearly divided semicircles for the bulk and the grain boundary contribution for the solid state synthesis, while the sol gel synthesis showed only one semicircle from the bulk contribution due to a large crystallite size. The total ionic conductivity for the pellet synthesized via the sol gel method is 1.82 mS/cm at 25°C which is the fastest found so far for garnet type or garnet related materials.

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Contributing Institute(s):

1. Grundlagen der Elektrochemie (IEK-9)

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 2019

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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