Di Lecce, D;
Sharova, V;
Jeong, S;
Moretti, A;
Passerini, S;
(2018)
A multiple electrolyte concept for lithium-metal batteries.
Solid State Ionics
, 316
pp. 66-74.
10.1016/j.ssi.2017.12.012.
Preview |
Text
A multiple electrolyte concept for lithium-metal batteries_revised_final.pdf - Accepted Version Download (1MB) | Preview |
Abstract
A cross-linked polymer membrane formed by poly(ethylene oxide) (PEO), N-methoxyethyl-N-methylpyrrolidium (fluorosulfonyl)(trifluoromethanesulfonyl)imide (Pyr12O1FTFSI) ionic liquid and LiFTFSI salt is proposed as the electrolyte for lithium-metal batteries. The ternary membrane has a PEO:Pyr12O1FTFSI:LiFTFSI composition of 20:6:4 by mole, which ensures thermal stability up to 220 °C, overall ionic conductivity of 10− 3 S cm− 1 at 40 °C and suitable Li+ transport properties. Combined with the LiFePO4 composite electrode, whose pores are filled with the Pyr12O1FTFSI:LiFTFSI electrolyte, and Li-metal anode, it yields Li/LiFePO4 cells delivering at 40 °C stable capacity (150 mAh g− 1 or 0.7 mAh cm− 2) with coulombic efficiency higher than 99.5%. Impedance spectroscopy measurements reveal low resistance of the electrode/electrolyte interface at both the anode and the cathode. Preliminary results at 20 °C indicates a capacity of 130 mAh g− 1 at C/10 rate (17 mA g− 1) with coulombic efficiency higher than 99.5%, thereby suggesting PEO:Pyr12O1FTFSI:LiFTFSI as suitable electrolyte for lithium-metal polymer batteries for stationary storage applications, coupled for example with PV and wind generation.
| Type: | Article |
|---|---|
| Title: | A multiple electrolyte concept for lithium-metal batteries |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.ssi.2017.12.012 |
| Publisher version: | http://doi.org/10.1016/j.ssi.2017.12.012 |
| 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: | (Fluorosulfonyl)(trifluoromethanesulfonyl)imide; Ionic liquid; N-methoxyethyl-Nmethylpyrrolidium; Poly (ethylene oxide); Polymer electrolyte; LiFePO4 |
| 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/10062227 |
Loading...
Loading...Loading...Loading...Archive Staff Only
 |
View Item |
