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{Chen:2019:10.1016/j.est.2019.100993,
author = {Chen, X and Liu, X and Ouyang, M and Childs, P and Brandon, N and Wu, B},
doi = {10.1016/j.est.2019.100993},
journal = {Journal of Energy Storage},
pages = {100993--100993},
title = {Electrospun composite nanofibre supercapacitors enhanced with electrochemically 3D printed current collectors},
url = {http://dx.doi.org/10.1016/j.est.2019.100993},
volume = {26},
year = {2019}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Carbonised electrospun nanofibres are attractive for supercapacitors due to their relatively high surface area, facile production routes and flexibility. With the addition of materials such as manganese oxide (MnO), the specific capacitance of the carbon nanofibres can be further improved through fast surface redox reactions, however this can reduce the electrical conductivity. In this work, electrochemical 3D printing is used as a novel means of improving electrical conductivity and the current collector-electrode interfacial resistance through the deposition of highly controlled layers of copper. Neat carbonised electrospun electrodes made with a 30 wt% manganese acetylacetonate (MnACAC) and polyacrylonitrile precursor solution have a hydrophobic nature preventing an even copper deposition. However, with an ethanol treatment, the nanofibre films can be made hydrophilic which enhances the copper deposition morphology to enable the formation of a percolating conductive network through the electrode. This has the impact of increasing electrode electronic conductivity by 360% from 10 S/m to 46 S/m and increasing specific capacitance 110% from 99 F/g to 208 F/g at 5mV/s through increased utilisation of the pseudocapacitive active material. This novel approach thus provides a new route for performance enhancement of electrochemical devices using 3D printing, which opens new design possibilities.
AU - Chen,X
AU - Liu,X
AU - Ouyang,M
AU - Childs,P
AU - Brandon,N
AU - Wu,B
DO - 10.1016/j.est.2019.100993
EP - 100993
PY - 2019///
SN - 2352-152X
SP - 100993
TI - Electrospun composite nanofibre supercapacitors enhanced with electrochemically 3D printed current collectors
T2 - Journal of Energy Storage
UR - http://dx.doi.org/10.1016/j.est.2019.100993
UR - https://www.sciencedirect.com/science/article/abs/pii/S2352152X19302841?via%3Dihub
UR - http://hdl.handle.net/10044/1/74227
VL - 26
ER -