Journal Article

FZJ-2018-01711

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Correlative Electrochemical Strain and Scanning Electron Microscopy for local characterization of the solid state electrolyte Li1.3Al0.3Ti1.7(PO4)3

Schön, N.FZJ* ; Guenduez, D.FZJ* ; Yu, S.FZJ* ; Tempel, H.FZJ* ; Schierholz, R.FZJ* ; Hausen, F. (Corresponding author)FZJ*

2018
Beilstein-Institut zur Förderung der Chemischen Wissenschaften Frankfurt, M.

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Please use a persistent id in citations: http://hdl.handle.net/2128/19039  doi:10.3762/bjnano.9.148

Abstract: Correlative microscopy has been used to investigate the relationship between Li-ion conductivity and the microstructure of lithium aluminum titanium phosphate (Li1.3Al0.3Ti1.7(PO4)3, LATP) with high spatial resolution. A key to improvement of solid state electrolytes such as LATP is a better understanding of interfacial and ion transport properties on relevant length scales in the nanometer to micrometer range. Using common techniques, such as electrochemical impedance spectroscopy, only global information can be obtained. In this work, we employ multiple microscopy techniques to gain local chemical and structural information paired with local insights into the Li-ion conductivity based on electrochemical strain microscopy (ESM). Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) have been applied at identical regions to identify microstructural components such as an AlPO4 secondary phase. We found significantly lower Li-ion mobility in the secondary phase areas as well as at grain boundaries. Additionally, various aspects of signal formation obtained from ESM for solid state electrolytes are discussed. We demonstrate that correlative microscopy is an adjuvant tool to gain local insights into interfacial properties of energy materials.

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Contributing Institute(s):

1. Grundlagen der Elektrochemie (IEK-9)
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 2018

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Database coverage:
; ; ; ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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