Imperial College London

Dr Samuel J Cooper

Faculty of EngineeringDyson School of Design Engineering

Lecturer
 
 
 
//

Contact

 

samuel.cooper Website

 
 
//

Location

 

ObservatorySouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Liu:2018:10.1016/j.jpowsour.2018.02.081,
author = {Liu, X and Naylor, Marlow M and Cooper, S and Song, B and Chen, X and Brandon, N and Wu, B},
doi = {10.1016/j.jpowsour.2018.02.081},
journal = {Journal of Power Sources},
pages = {264--269},
title = {Flexible all-fiber electrospun supercapacitor},
url = {http://dx.doi.org/10.1016/j.jpowsour.2018.02.081},
volume = {384},
year = {2018}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - We present an all-fiber flexible supercapacitor with composite nanofiber electrodes made via electrospinning and an electrospun separator. With the addition of manganese acetylacetonate (MnACAC) to polyacrylonitrile (PAN) as a precursor for the electrospinning process and subsequent heat treatment, the performance of pure PAN supercapacitors was improved from 90 F.g-1 to 200 F.g-1 (2.5 mV.s-1) with possible mass loadings of MnACAC demonstrated as high as 40 wt%. X-ray diffraction measurements showed that after thermal treatment, the MnACAC was converted to MnO, meanwile, the thermal decomposition of MnACAC increased the graphitic degree of the carbonised PAN. Scanning electron microscopy and image processing showed that static electrospinning of pure PAN and PAN-Mn resulted in fiber diameters of 460 nm and 480 nm respectively after carbonisation. Further analysis showed that the fiber orientation exhibited a slight bias which was amplified with the addition of MnACAC. Use of focused ion beam scanning electron microscopy tomography also showed that MnO particles were evenly distributed through the fiber at low MnACAC concentrations, while at a 40 wt% loading the MnO particles were also visible on the surface. Comparison of the electrospun separators showed improved performance relative to a commercial Celgard separator (200 F.g-1 vs 141 F.g-1).
AU - Liu,X
AU - Naylor,Marlow M
AU - Cooper,S
AU - Song,B
AU - Chen,X
AU - Brandon,N
AU - Wu,B
DO - 10.1016/j.jpowsour.2018.02.081
EP - 269
PY - 2018///
SN - 0378-7753
SP - 264
TI - Flexible all-fiber electrospun supercapacitor
T2 - Journal of Power Sources
UR - http://dx.doi.org/10.1016/j.jpowsour.2018.02.081
UR - http://hdl.handle.net/10044/1/57534
VL - 384
ER -