Imperial College London
Alternate

Prof Milo Shaffer

Faculty of Natural Sciences, Department of Chemistry

Professor of Materials Chemistry
 
 
 
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Contact

 

+44 (0)20 7594 5825m.shaffer Website

 
 
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Assistant

 

Mr John Murrell +44 (0)20 7594 2845

 
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Location

 

401BMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wendong:2021:2399-7532/ac1ea7,
author = {Wendong, Q and Dent, J and Arrighi, V and Cavalcanti, L and Shaffer, MSP and Shirshova, N},
doi = {2399-7532/ac1ea7},
journal = {Multifunctional Materials},
pages = {1--12},
title = {Biphasic epoxy-ionic liquid structural electrolytes: minimising feature size through cure cycle and multifunctional block-copolymer addition},
url = {http://dx.doi.org/10.1088/2399-7532/ac1ea7},
volume = {4},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Structural electrolytes provide mechanical properties approaching structural resin combined with a high degree of ionic conductivity. Here, structural electrolytes based on bisphenol A diglycidyl ether and the ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (EMIM-TFSI) were synthesised through reaction induced phase separation (RIPS) using isophorone diamine (iPDA) as a curing agent. The microstructure and properties of the resulting materials were controlled through both the initial formulations and the curing temperature. Curing at room temperature generated a bi-continuous structure and improved both mechanical performance and ionic conductivity of the resulting structural electrolytes. The balance between properties can be systematically adjusted; for example, a promising Young's modulus of 800 MPa was obtained simultaneously with an ionic conductivity of 0.28 mS cm−1, for a formulation containing 35 vol% EMIM-TFSI. The lengthscale of the structural features was reduced by an order of magnitude by introducing multifunctional block-copolymers (MF-bcP) based on glycidyl methacrylate (GMA) and quaternised (2-dimethylamino)ethyl methacrylate (DMAEMA). Small angle neutron scattering (SANS), obtained during curing, identified at least two structural phases of different length scale, for the formulations containing MF-bcP, in agreement with microstructures observed using scanning electron microscopy. Such structural electrolytes may be required when using structural electrodes that also have finer characteristic lengthscales. The addition of the MF-bcP to formulations containing 35 vol% EMIM-TFSI produced structural electrolytes with a Young's modulus of 530 MPa and an ionic conductivity of 0.64 mS cm−1.
AU  - Wendong,Q
AU  - Dent,J
AU  - Arrighi,V
AU  - Cavalcanti,L
AU  - Shaffer,MSP
AU  - Shirshova,N
DO  - 2399-7532/ac1ea7
EP  - 12
PY  - 2021///
SN  - 2399-7532
SP  - 1
TI  - Biphasic epoxy-ionic liquid structural electrolytes: minimising feature size through cure cycle and multifunctional block-copolymer addition
T2  - Multifunctional Materials
UR  - http://dx.doi.org/10.1088/2399-7532/ac1ea7
UR  - https://iopscience.iop.org/article/10.1088/2399-7532/ac1ea7
UR  - http://hdl.handle.net/10044/1/92373
VL  - 4
ER  -
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