Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 19, Issue 18, Pages 11152-11162Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cp01238a
Keywords
-
Funding
- German Ministry of Education and Research (BMBF) [03XP0037A, 03P0084A]
- Heinrich Boll Foundation
Ask authors/readers for more resources
In order to gain a deeper understanding of Li and Mg polysulphides in Li/S and Mg/S batteries, respectively, this work investigates the impact of the two different cations as well as the influence of the electrolyte solvents' relative dielectric permittivity and Gutmann's donor number on the solubility and relative stability of different Li and Mg polysulphide species. Therefore, the disproportionation and dissociation equilibria of chemically prepared Li2S8'' and MgS8'' solutions in DMSO, DMF, ACN, THF, DME, TEGDME, and Pyr(14)TFSI are characterized by UV/Vis spectroscopy. Varying the cation and the solvent reveals their mutual interplay in stabilizing different polysulphide species. To our knowledge, this is the first time that chemically synthesized Mg polysulphides in solutions are studied. The results of this work provide essential knowledge for further development of the economically, ecologically, and also in terms of energy density and safety, attractive Mg/S batteries.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available