PMID- 35170966
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220716
IS  - 1948-7185 (Electronic)
IS  - 1948-7185 (Linking)
VI  - 13
IP  - 7
DP  - 2022 Feb 24
TI  - Insights into the Transport and Thermodynamic Properties of a 
      Bis(fluorosulfonyl)imide-Based Ionic Liquid Electrolyte for Battery Applications.
PG  - 1734-1741
LID - 10.1021/acs.jpclett.1c04246 [doi]
AB  - Ionic liquid electrolytes (ILEs) have become popular in various advanced Li-ion 
      battery chemistries because of their high electrochemical and thermal stability 
      and low volatility. However, because of their relatively high viscosity and poor 
      Li(+) diffusion, it is thought large concentration gradients form, reducing their 
      rate capability. Herein, we utilize operando Raman microspectroscopy to visualize 
      ILE concentration gradients for the first time. Specifically, using lithium 
      bis(fluorosulfonyl)imide (LiFSI) in N-propyl-N-methylpyrrolidinium FSI, its 
      "apparent" diffusion coefficient, lithium transference number, thermodynamic 
      factor, ionic conductivity, and resistance of charge transfer against lithium 
      metal were isolated. Furthermore, the analysis of these concentration gradients 
      led to insights into the bulk structure of ILEs, which we propose are composed of 
      large, ordered aggregates.
FAU - Fawdon, Jack
AU  - Fawdon J
AD  - Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K.
FAU - Rees, Gregory J
AU  - Rees GJ
AD  - Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K.
AD  - The Faraday Institution Quad One, Harwell Science and Innovation Campus, Didcot 
      OX11 0RA, U.K.
FAU - La Mantia, Fabio
AU  - La Mantia F
AUID- ORCID: 0000-0001-7743-4198
AD  - Universtat Bremen, Energiespeicher-und Energiewandlersysteme, Bibliotechkstrasse 
      1, Bremen 28359, Germany.
FAU - Pasta, Mauro
AU  - Pasta M
AUID- ORCID: 0000-0002-2613-4555
AD  - Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K.
AD  - The Faraday Institution Quad One, Harwell Science and Innovation Campus, Didcot 
      OX11 0RA, U.K.
LA  - eng
PT  - Journal Article
DEP - 20220216
PL  - United States
TA  - J Phys Chem Lett
JT  - The journal of physical chemistry letters
JID - 101526034
SB  - IM
PMC - PMC9084600
COIS- The authors declare no competing financial interest.
EDAT- 2022/02/17 06:00
MHDA- 2022/02/17 06:01
PMCR- 2022/05/09
CRDT- 2022/02/16 12:14
PHST- 2022/02/17 06:00 [pubmed]
PHST- 2022/02/17 06:01 [medline]
PHST- 2022/02/16 12:14 [entrez]
PHST- 2022/05/09 00:00 [pmc-release]
AID - 10.1021/acs.jpclett.1c04246 [doi]
PST - ppublish
SO  - J Phys Chem Lett. 2022 Feb 24;13(7):1734-1741. doi: 10.1021/acs.jpclett.1c04246. 
      Epub 2022 Feb 16.