Stabilizing the Performance of High-Capacity Sulfur Composite Electrodes by a New Gel Polymer Electrolyte Configuration
Journal article, 2017

Increased pollution and the resulting increase in global warming are drawing attention to boosting the use of renewable energy sources such as solar or wind. However, the production of energy from most renewable sources is intermittent and thus relies on the availability of electrical energy-storage systems with high capacity and at competitive cost. Lithium–sulfur batteries are among the most promising technologies in this respect due to a very high theoretical energy density (1675 mAh g?1) and that the active material, sulfur, is abundant and inexpensive. However, a so far limited practical energy density, life time, and the scaleup of materials and production processes prevent their introduction into commercial applications. In this work, we report on a simple strategy to address these issues by using a new gel polymer electrolyte (GPE) that enables stable performance close to the theoretical capacity of a low cost sulfur–carbon composite with high loading of active material, that is, 70 % sulfur. We show that the GPE prevents sulfur dissolution and reduces migration of polysulfide species to the anode. This functional mechanism of the GPE membranes is revealed by investigating both its morphology and the Li-anode/GPE interface at various states of discharge/charge using Raman spectroscopy.

sulfur

gel polymer electrolytes

energy storage

batteries

raman spectroscopy

Author

Marco Agostini

Chalmers, Physics, Condensed Matter Physics

Du Hyun Lim

Chalmers, Physics, Condensed Matter Physics

Matthew Sadd

Chalmers, Physics, Condensed Matter Physics

Chiara Fasciani

Istituto Italiano di Tecnologia

M.A. Navarra

Sapienza University of Rome

Stefania Panero

Sapienza University of Rome

Sergio Brutti

Universita degli Studi della Basilicata

Aleksandar Matic

Chalmers, Physics, Condensed Matter Physics

B Scrosati

Istituto Italiano di Tecnologia

ChemSusChem

1864-5631 (ISSN) 1864-564X (eISSN)

Vol. 10 17 3490-3496

Subject Categories

Energy Systems

DOI

10.1002/cssc.201700977

More information

Latest update

11/30/2018