Carbon Composites for a High-Energy Lithium–Sulfur Battey with a Glyme-Based Electrolyte
Artikel i vetenskaplig tidskrift, 2017

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.

energy storage

carbon

lithium

sulfur

batteries

Författare

Lorenzo Carbone

Sapienza, Università di Roma

Jing Peng

City University of New York

Marco Agostini

Chalmers, Fysik, Kondenserade materiens fysik

Mallory Gobet

City University of New York

Matthew Devany

City University of New York

B Scrosati

Helmholtz Institute Ulm

Steve Greenbaum

City University of New York

Jusef Hassoun

University of Ferrara

ChemElectroChem

2196-0216 (eISSN)

Vol. 4 1 209-215

Drivkrafter

Hållbar utveckling

Ämneskategorier

Fysik

Kemi

DOI

10.1002/celc.201600586

Mer information

Senast uppdaterat

2018-03-05