Benítez, A;
Di Lecce, D;
Caballero, A;
Morales, J;
Rodríguez-Castellón, E;
Hassoun, J;
(2018)
Lithium sulfur battery exploiting material design and electrolyte chemistry: 3D graphene framework and diglyme solution.
Journal of Power Sources
, 397
pp. 102-112.
10.1016/j.jpowsour.2018.07.002.
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Abstract
Herein we investigate a lithium sulfur battery suitably combining alternative cathode design and relatively safe, highly conductive electrolyte. The composite cathode is formed by infiltrating sulfur in a N-doped 3D graphene framework prepared by a microwave assisted solvothermal approach, while the electrolyte is obtained by dissolving lithium bis(trifluoromethane)sulfonimide (LiTFSI) in diethylene glycol dimethyl ether (DEGDME), and upgraded by addition of lithium nitrate (LiNO₃) as a film forming agent. The particular structure of the composite cathode, studied in this work by employing various techniques, well enhances the lithium-sulfur electrochemical process leading to very stable cycling trend and specific capacity ranging from 1000 mAh g⁻¹ at the highest rate to 1400 mAh g⁻¹ at the lowest one. The low resistance of the electrode/electrolyte interphase, driven by an enhanced electrode design and a suitable electrolyte, is considered one of the main reasons for the high performance which may be of interest for achieving a promising lithium-sulfur battery. Furthermore, the study reveals a key bonus of the cell represented by the low flammability of the diglyme electrolyte, while comparable conductivity and interface resistance, with respect to the most conventional solution used for the lithium sulfur cell.
| Type: | Article |
|---|---|
| Title: | Lithium sulfur battery exploiting material design and electrolyte chemistry: 3D graphene framework and diglyme solution |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jpowsour.2018.07.002 |
| Publisher version: | https://doi.org/10.1016/j.jpowsour.2018.07.002 |
| 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: | 3D-graphene, Li-S battery, Solvothermal microwave, Nitrogen doping, Low flammablitiy |
| 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/10062411 |
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