Journal Article

FZJ-2021-02873

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Nano‐Scale Complexions Facilitate Li Dendrite‐Free Operation in LATP Solid‐State Electrolyte

Stegmaier, S. ; Schierholz, R.FZJ* ; Povstugar, I.FZJ* ; Barthel, J.FZJ* ; Rittmeyer, S. P.Extern* ; Yu, S.FZJ* ; Wengert, S.Extern* ; Rostami, S. ; Kungl, H.FZJ* ; Reuter, K.Extern* ; Eichel, R.-A.FZJ* ; Scheurer, C. (Corresponding author)

2021
Wiley-VCH Weinheim

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Please use a persistent id in citations: http://hdl.handle.net/2128/28313  doi:10.1002/aenm.202100707

Abstract: Dendrite formation and growth remains a major obstacle toward high-performance all solid-state batteries using Li metal anodes. The ceramic Li(1+x)Al(x)Ti(2−x)(PO4)3 (LATP) solid-state electrolyte shows a higher than expected stability against electrochemical decomposition despite a bulk electronic conductivity that exceeds a recently postulated threshold for dendrite-free operation. Here, transmission electron microscopy, atom probe tomography, and first-principles based simulations are combined to establish atomistic structural models of glass-amorphous LATP grain boundaries. These models reveal a nanometer-thin complexion layer that encapsulates the crystalline grains. The distinct composition of this complexion constitutes a sizable electronic impedance. Rather than fulfilling macroscopic bulk measures of ionic and electronic conduction, LATP might thus gain the capability to suppress dendrite nucleation by sufficient local separation of charge carriers at the nanoscale.

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Contributing Institute(s):

1. Materialwissenschaft u. Werkstofftechnik (ER-C-2)
2. Grundlagen der Elektrochemie (IEK-9)

Research Program(s):

1. 5353 - Understanding the Structural and Functional Behavior of Solid State Systems (POF4-535) (POF4-535)
2. 1223 - Batteries in Application (POF4-122) (POF4-122)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 25 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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