Ionic liquids to the rescue? Overcoming the ionic conductivity limitations of polymer electrolytes

2003 ◽  
Vol 5 (12) ◽  
pp. 1016-1020 ◽  
Author(s):  
J Shin
Keyword(s):  
Ionic Liquids ◽  
Ionic Conductivity ◽  
Polymer Electrolytes

Effect of storage time on the ionic conductivity of chitosan-solid polymer electrolytes incorporating cyano-based ionic liquids

2017 ◽  
Vol 232 ◽  
pp. 22-29 ◽  
Author(s):  
Rita Leones ◽  
Rodrigo C. Sabadini ◽  
José M.S.S. Esperança ◽  
Agnieszka Pawlicka ◽  
M. Manuela Silva
Keyword(s):  
Ionic Liquids ◽  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Storage Time ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer

scholarly journals Polymerizable Ionic Liquids for Solid-State Polymer Electrolytes

Molecules ◽  
2019 ◽  
Vol 24 (2) ◽  
pp. 324 ◽  
Author(s):  
Robert Löwe ◽  
Thomas Hanemann ◽  
Andreas Hofmann
Keyword(s):  
Ionic Liquids ◽  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
High Yield ◽  
Dsc Analysis ◽  
Energy Storage Devices ◽  
Methyl Group ◽  
Storage Devices ◽  
Alkyl Groups ◽  
Phase Transition Temperatures

Eight new polymerizable ammonium-TFSI ionic liquids were synthesized and characterized with respect to an application in energy storage devices. The ionic liquids feature methacrylate or acrylate termination as polymerizable groups. The preparation was optimized to obtain the precursors and ionic liquids in high yield. All products were characterized by NMR and IR spectroscopy. Phase transition temperatures were obtained by DSC analysis. Density, viscosity and ionic conductivity of the ionic liquids were compared and discussed. The results reveal that the length of attached alkyl groups as well as the methyl group at the polymerizable function have significant influences on the ionic liquids physicochemical properties. Ionic conductivity values vary between 0.264 mS cm−1 for [C2NA,22]TFSI and 0.080 mS cm−1 for [C8NMA,22]TFSI at 25 °C. Viscosity values are within a range of 0.762 Pa s for [C2NA,22]TFSI and 1.522 Pa s for [C6NMA,22]TFSI at 25 °C.

scholarly journals Ternary polymer electrolytes incorporating pyrrolidinium-imide ionic liquids

RSC Advances ◽  
2015 ◽  
Vol 5 (18) ◽  
pp. 13598-13606 ◽  
Author(s):  
Henrik de Vries ◽  
Sangsik Jeong ◽  
Stefano Passerini
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
High Ionic Conductivity ◽  
Ternary Polymer

Amorphous PEO-ionic liquid–LiX polymer electrolytes containing mixed imide anions exhibit high ionic conductivity and lithium plating–stripping capability at moderate temperatures.

Solid Polymer Electrolytes from Crosslinked PEG and Dilithium N,N'-Bis(trifluoromethanesulfonyl)perfluoroalkane-1,ω-disulfonamide and Lithium Bis(trifluoromethanesulfonyl)imide Salts

2008 ◽  
Vol 73 (12) ◽  
pp. 1777-1798 ◽  
Author(s):  
Olt E. Geiculescu ◽  
Rama V. Rajagopal ◽  
Emilia C. Mladin ◽  
Stephen E. Creager ◽  
Darryl D. Desmarteau
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Minimum Energy ◽  
Ionic Conductivities ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Segmental Motion ◽  
Concentrated Electrolytes ◽  
Two Factors ◽  
Poly Ethylene

The present work consists of a series of studies with regard to the structure and charge transport in solid polymer electrolytes (SPE) prepared using various new bis(trifluoromethanesulfonyl)imide (TFSI)-based dianionic dilithium salts in crosslinked low-molecular-weight poly(ethylene glycol). Some of the thermal properties (glass transition temperature, differential molar heat capacity) and ionic conductivities were determined for both diluted (EO/Li = 30:1) and concentrated (EO/Li = 10:1) SPEs. Trends in ionic conductivity of the new SPEs with respect to anion structure revealed that while for the dilute electrolytes ionic conductivity is generally rising with increased length of the perfluoroalkylene linking group in the dianions, for the concentrated electrolytes the trend is reversed with respect to dianion length. This behavior could be the result of a combination of two factors: on one hand a decrease in dianion basicity that results in diminished ion pairing and an enhancement in the number of charge carriers with increasing fluorine anion content, thereby increasing ionic conductivity while on the other hand the increasing anion size and concentration produce an increase in the friction/entanglements of the polymeric segments which lowers even more the reduced segmental motion of the crosslinked polymer and decrease the dianion contribution to the overall ionic conductivity. DFT modeling of the same TFSI-based dianionic dilithium salts reveals that the reason for the trend observed is due to the variation in ion dissociation enthalpy, derived from minimum-energy structures, with respect to perfluoroalkylene chain length.

Polyvinyl fibers as outperform candidature in the solid polymer electrolytes

2020 ◽  
pp. 152808372097062
Author(s):  
Muhammad Yameen Solangi ◽  
Umair Aftab ◽  
Muhammad Ishaque ◽  
Aqeel Bhutto ◽  
Ayman Nafady ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Weight Loss ◽  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Vital Role ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Main Challenge ◽  
Different Temperatures ◽  
Solution Cast

Solid polymer electrolytes (SPEs) are the best choice to replace liquid electrolytes in supercapacitors, fuel cells, solar cells and batteries. The main challenge in this filed is the ionic conductivity and thermal stability of SPEs which is still not up to mark, therefore more investigations are needed to address these issues. In this study, PVA/salt based SPEs was fabricated using both solution cast and electro-spinning methods to probe the effect of different salts such as (NaCl, KCl and KI) and their concentrations on the ionic conductivity. Scanning electron microscopy (SEM) x and Fourier Transform Infra-Red (FTIR) have been employed to study the morphology as well as the different functional groups of SPEs, respectively. It was noted that small addition of NaCl, KCl and KI salts in SPEs dramatically increased the ionic conductivity to 5.95×10−6, 5.31×10−6 and 4.83×10−6 S/cm, respectively. Importantly, the SPEs obtained with NaCl via electro-spinning have higher ionic conductivity (5.95×10−6 S/cm) than their casted SPEs (1.87×10−6 S/cm). Thermal stability was also studied at two different temperatures i.e. 80 °C and 100 °C. The weight loss percentage of electrospun SPEs have zero percent weight loss than the solution based SPEs. The combined results clearly indicated that the nature of salt, concentration and fabrication process play a vital role in the ionic conductivity. Also, the NaCl salt with low molecular weight at low concentrations shows an enhanced ionic conductivity.

ChemInform Abstract: Ionic Conductivity of Nanostructured Hybrid Materials Designed from Imidazolium Ionic Liquids and Kaolinite.

ChemInform ◽  
2009 ◽  
Vol 40 (8) ◽  
Author(s):  
Sadok Letaief ◽  
Thomas Diaco ◽  
Wendy Pell ◽  
Serge I. Gorelsky ◽  
Christian Detellier
Keyword(s):  
Ionic Liquids ◽  
Ionic Conductivity ◽  
Hybrid Materials ◽  
Imidazolium Ionic Liquids
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