UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

High capacity semi-liquid lithium sulfur cells with enhanced reversibility for application in new-generation energy storage systems

Di Lecce, D; Marangon, V; Benitez, A; Caballero, A; Morales, J; Rodríguez-Castellón, E; Hassoun, J; (2019) High capacity semi-liquid lithium sulfur cells with enhanced reversibility for application in new-generation energy storage systems. Journal of Power Sources , 412 pp. 575-585. 10.1016/j.jpowsour.2018.11.068. Green open access

[thumbnail of Di Lecce_High capacity semi-liquid lithium sulfur cells with enhanced reversibility for application in new-generation energy storage systems_AAM.pdf]
Preview
Text
Di Lecce_High capacity semi-liquid lithium sulfur cells with enhanced reversibility for application in new-generation energy storage systems_AAM.pdf - Accepted Version

Download (1MB) | Preview

Abstract

Semi-liquid configuration of sulfur cell is proposed as simple strategy to develop high-energy lithium battery. Two solutions of Li₂S₈ in diethylene glycol dimethyl ether (DEGDME), containing either lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) or lithium trifluoromethansulfonate (LiCF₃SO₃) and lithium nitrate (LiNO₃), are studied as catholytes for Li/S cells exploiting the polysulfides electrochemical reaction at about 2.2 V vs. Li⁺/Li. X-ray photoelectron spectroscopy (XPS) and thermal analyses, respectively, reveal composition and high-temperature stability of the catholyte solutions. Ad hoc study conducted by impedance spectroscopy, voltammetry, and galvanostatic techniques suggests well suitable characteristics in terms of Li⁺-transport ability, electrochemical stability window, and electrode/electrolyte interphase features. Cells with sulfur loading ranging from about 3 to 6 mg cm⁻² into the solution are successfully studied with remarkable performances in terms of current rates, efficiency and cycle life. Hence, the lithium cells based on the catholyte deliver maximum capacity of the order of 1100 mAh gs⁻¹ at C/10 rate and stable capacity of about 800 mAh gs⁻¹ at C/3 rate with Coulombic efficiency exceeding 99%. Therefore, the catholyte solutions studied herein are considered as a very promising candidates for high-energy storage in next generation systems, such as the intriguing hybrid and electric vehicles.

Type: Article
Title: High capacity semi-liquid lithium sulfur cells with enhanced reversibility for application in new-generation energy storage systems
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.jpowsour.2018.11.068
Publisher version: https://doi.org/10.1016/j.jpowsour.2018.11.068
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Catholyte polysulfide, Lithium-sulfur battery, X-ray photoelectron spectroscopy, LiTFSI, LiCF₃SO₃, DEGDME
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10071796
Downloads since deposit
127Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item