Imperial College London

Prof Milo Shaffer

Faculty of Natural SciencesDepartment of Chemistry

Professor of Materials Chemistry
 
 
 
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Contact

 

+44 (0)20 7594 5825m.shaffer

 
 
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Assistant

 

Mr John Murrell +44 (0)20 7594 2845

 
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Location

 

M221Royal College of ScienceSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Shirshova:2014:10.1021/jp507952b,
author = {Shirshova, N and Bismarck, A and Greenhalgh, ES and Johansson, P and Kalinka, G and Marczewski, MJ and Shaffer, MSP and Wienrich, M},
doi = {10.1021/jp507952b},
journal = {Journal of Physical Chemistry C},
pages = {28377--28387},
title = {Composition as a means to control morphology and properties of epoxy based dual-phase structural electrolytes},
url = {http://dx.doi.org/10.1021/jp507952b},
volume = {118},
year = {2014}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - © 2014 American Chemical Society. Structural electrolytes were prepared using a fully formulated commercially available high performance epoxy resin (MTM57) and an ionic liquid based electrolyte: lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) dissolved in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIM-TFSI). Through a systematic study, the composition of the formulations was found to have a greater effect than the curing temperature on the morphology and properties of the resulting structural electrolytes. The presence of lithium salt is essential to form a structurally homogeneous electrolyte. Bicontinuous morphologies containing continuous (coarse) epoxy networks surrounded by connected spherical epoxy nodules were obtained with different length scales upon varying the lithium salt concentration. Increasing the LiTFSI concentration improved the miscibility of MTM57 with the electrolyte and decreased the characteristic length scale of the resulting bicontinuous microstructure. The properties of the structural electrolytes correlated with the morphology, showing increased Youngs modulus and decreased ionic conductivity with increasing lithium salt concentration. The miscibility of the epoxy system with the electrolyte was also improved by substitution of EMIM-TFSI with an equal weight of an aprotic organic solvent, propylene carbonate (PC); however, the window of PC concentrations which resulted in structural electrolytes with bicontinuous microstructures was very narrow; at PC concentrations above 1 wt %, gel-like polymers with no permanent mesoporosity were obtained.
AU - Shirshova,N
AU - Bismarck,A
AU - Greenhalgh,ES
AU - Johansson,P
AU - Kalinka,G
AU - Marczewski,MJ
AU - Shaffer,MSP
AU - Wienrich,M
DO - 10.1021/jp507952b
EP - 28387
PY - 2014///
SN - 1932-7447
SP - 28377
TI - Composition as a means to control morphology and properties of epoxy based dual-phase structural electrolytes
T2 - Journal of Physical Chemistry C
UR - http://dx.doi.org/10.1021/jp507952b
VL - 118
ER -