TY  - JOUR
AU  - Szczęsna-Chrzan, Anna
AU  - Vogler, Monika
AU  - Yan, Peng
AU  - Żukowska, Grażyna Zofia
AU  - Wölke, Christian
AU  - Ostrowska, Agnieszka
AU  - Szymańska, Sara
AU  - Marcinek, Marek
AU  - Winter, Martin
AU  - Cekic-Laskovic, Isidora
AU  - Wieczorek, Władysław
AU  - Stein, Helge S.
TI  - Ionic conductivity, viscosity, and self-diffusion coefficients of novel imidazole salts for lithium-ion battery electrolytes
JO  - Journal of materials chemistry / A
VL  - 11
IS  - 25
SN  - 2050-7488
CY  - London ˜[u.a.]œ
PB  - RSC
M1  - FZJ-2023-05449
SP  - 13483 - 13492
PY  - 2023
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001000378400001
DO  - DOI:10.1039/D3TA01217D
UR  - https://juser.fz-juelich.de/record/1019502
ER  -