Carbon Composites for a High-Energy Lithium–Sulfur Battey with a Glyme-Based Electrolyte

Carbone, LorenzoUniversita degli Studi di Roma la Sapienza,Sapienza University of Rome (författare)

A comparative study of sulfur composites using carbon of various natures, namely, graphite, mesocarbon microbeads, and multi-walled carbon nanotubes, is performed in lithium battery design and evaluation. Morphological and structural analyses, by means of SEM and XRD, cyclic voltammetry and galvanostatic cycling in lithium cells are employed for characterization of the materials. Tetraethylene glycol dimethyl ether containing lithium trifluoromethansulfonate is considered the preferred electrolyte for performing the electrochemical tests. Prior to use in cells, the electrolyte characteristics in terms of 1H, 7Li, and 19F nuclei self-diffusion coefficients, ionic conductivity, and ionic association degree are studied by combining NMR and impedance spectroscopy. The best lithium–sulfur composite reported herein achieves a capacity higher than 500 mAh g?1 over 140 cycles with no sign of dendrite formation or failure. This performance is considered sufficiently suitable for the development of high-energy lithium batteries, in particular, considering the expected safety of the cells by employing a nonflammable glyme electrolyte instead of a conventional carbonate-based one.

Peng, JingCity University of New York (författare)
Agostini, Marco,1987Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)agostini (författare)
Gobet, MalloryCity University of New York (författare)
Devany, MatthewCity University of New York (författare)
Scrosati, BHelmholtz Zentrum,Helmholtz Center (författare)
Greenbaum, SteveCity University of New York (författare)
Hassoun, JusefUniversity of Ferrara (författare)
Universita degli Studi di Roma la SapienzaCity University of New York (creator_code:org_t)

Av författaren/redakt...: Carbone, Lorenzo; Peng, Jing; Agostini, Marco, ...; Gobet, Mallory; Devany, Matthew; Scrosati, B; visa fler...; Greenbaum, Steve; Hassoun, Jusef; visa färre...

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.