Imperial College London

Professor Nigel Brandon OBE FREng

Faculty of Engineering

Dean of the Faculty of Engineering
 
 
 
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Contact

 

+44 (0)20 7594 8600n.brandon Website

 
 
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Location

 

2.06Faculty BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Liu:2019:10.1002/advs.201801337,
author = {Liu, X and Taiwo, O and Yin, C and Ouyang, M and Chowdhury, R and Wang, B and Wang, H and Wu, B and Brandon, N and Wang, Q and Cooper, S},
doi = {10.1002/advs.201801337},
journal = {Advanced Science},
title = {Aligned lonogel electrolytes for hightemperature supercapacitors},
url = {http://dx.doi.org/10.1002/advs.201801337},
year = {2019}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Ionogels are a new class of promising materials for use in allsolidstate energy storage devices in which they can function as an integrated separator and electrolyte. However, their performance is limited by the presence of a crosslinking polymer, which is needed to improve the mechanical properties, but compromises their ionic conductivity. Here, directional freezing is used followed by a solvent replacement method to prepare aligned nanocomposite ionogels which exhibit enhanced ionic conductivity, good mechanical strength, and thermal stability simultaneously. The aligned ionogel based supercapacitor achieves a 29% higher specific capacitance (176 F g−1 at 25 °C and 1 A g−1) than an equivalent nonaligned form. Notably, this thermally stable aligned ionogel has a high ionic conductivity of 22.1 mS cm−1 and achieves a high specific capacitance of 167 F g−1 at 10 A g−1 and 200 °C. Furthermore, the diffusion simulations conducted on 3D reconstructed tomography images are employed to explain the improved conductivity in the relevant direction of the aligned structure compared to the nonaligned. This work demonstrates the synthesis, analysis, and use of aligned ionogels as supercapacitor separators and electrolytes, representing a promising direction for the development of wearable electronics coupled with image based process and simulations.
AU - Liu,X
AU - Taiwo,O
AU - Yin,C
AU - Ouyang,M
AU - Chowdhury,R
AU - Wang,B
AU - Wang,H
AU - Wu,B
AU - Brandon,N
AU - Wang,Q
AU - Cooper,S
DO - 10.1002/advs.201801337
PY - 2019///
SN - 2198-3844
TI - Aligned lonogel electrolytes for hightemperature supercapacitors
T2 - Advanced Science
UR - http://dx.doi.org/10.1002/advs.201801337
UR - http://hdl.handle.net/10044/1/66470
ER -