Journal Article

IMPULSE-2024-00190

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Comparative Analysis of Reactivity of Al and Ga Doped Garnet Solid State Electrolyte at the Interface with Li Metal

Klenk, M. ; Paul, N.MLZ* ; Counihan, M. J. ; Hood, Z. D. ; Zhu, Y. ; Connell, J. G. ; Hervoches, C. ; Gilles, R. ; Sakamoto, J. ; Tepavcevic, S. (Corresponding author) ; Zapol, P. (Corresponding author)

2024
ACS Publications Washington, DC

Please use a persistent id in citations: doi:10.1021/acsmaterialslett.4c01237

Abstract: Lithium garnet (Li7La3Zr2O12, LLZO) based solid electrolytes are leading candidate materials for all-solid-state batteries with lithium metal anodes because of their high ionic conductivity, high mechanical toughness, and superior electrochemical stability. While doping LLZO with Al and Ga increases its ionic conductivity by stabilizing the cubic phase, the impact of dopants on its (electro)chemical stability at the interfaces with Li metal is critical. Our study of differences between Al- and Ga-doped LLZO when interfaced with lithium metal using X-ray photoelectron spectroscopy and density functional theory shows a higher propensity of Ga to move across LLZO interface with Li metal and form Ga–Li alloy. Neutron diffraction reveals loss of cubic phase resulting from the loss of dopant that explains electrochemical behavior differences between Ga- and Al-doped LLZO. Overall, our study reveals the key role of dopant chemistry in enabling stable solid electrolyte materials for all-solid-state batteries.

Keyword(s): Energy (1st) ; Materials Science (2nd) ; Industrial Application (2nd) ; Condensed Matter Physics (2nd)

---

Contributing Institute(s):

1. DEVA (DEVA)
2. MATSCI (MATSCI)

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2024

---

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 ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---