Journal Article

FZJ-2023-05449

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ionic conductivity, viscosity, and self-diffusion coefficients of novel imidazole salts for lithium-ion battery electrolytes

Szczęsna-Chrzan, A. ; Vogler, M. ; Yan, P.FZJ* ; Żukowska, G. Z. ; Wölke, C.FZJ* ; Ostrowska, A. ; Szymańska, S. ; Marcinek, M. ; Winter, M.FZJ* ; Cekic-Laskovic, I. (Corresponding author)FZJ* ; Wieczorek, W. (Corresponding author) ; Stein, H. S. (Corresponding author)

2023
RSC London ˜[u.a.]œ

This record in other databases:    

Please use a persistent id in citations: doi:10.1039/D3TA01217D  doi:10.34734/FZJ-2023-05449

Abstract: Lithium-ion battery performance and longevity depend critically on the conducting salt utilized in the electrolyte.With new avenues for multifunctional integration and optimization of functional properties, conducting saltsbeyond lithium hexafluorophosphate (LiPF6) need to be studied. Herein we elucidate on viscosity, ionicity,anion self-diffusion and ionic conductivity through variation of the length of the perfluoroalkyl side chainpresent in the anions of the used lithium imidazole salts. Specifically, we study LiPF6 in comparison withlithium 4,5-dicyano-2-(trifluoromethyl)imidazolide (LiTDI), lithium 4,5-dicyano-2-(pentafluoroethyl)imidazolide (LiPDI), and lithium 4,5-dicyano-2-(n-heptafluoropropyl)imidazolide (LiHDI). We find that the ionmobility of LiPF6 depends the least on viscosity and its ionicity is the highest among the electrolytesinvestigated here. LiTDI shows the strongest correlation between ion mobility and viscosity and the lowestionicity. LiPDI and LiHDI range between these two regarding their ionicity and the correlation of mobility withviscosity. The previously rarely studied anion self-diffusion coefficients exhibit a strong correlation withviscosity as it was to be expected. Differences between the LiTDI, LiPDI and LiHDI salts are minute.

---

Contributing Institute(s):

1. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IEK-12)

Research Program(s):

1. 1221 - Fundamentals and Materials (POF4-122) (POF4-122)
2. BIG-MAP - Battery Interface Genome - Materials Acceleration Platform (957189) (957189)
3. BATTERY 2030PLUS - BATTERY 2030+ large-scale research initiative: At the heart of a connected green society (957213) (957213)

Appears in the scientific report 2023

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 10 ; JCR ; National-Konsortium ; SCOPUS ; Web of Science Core Collection

---