7-11 July 2014
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=16&confId=34"><font color=#0000ff>SAIP2014 Proceedings published on 17 April 2015</font></a>

Ex-situ Ni-Al Double Hydroxide Microspheres on a Nickel foam-Graphene Template as Electrode Material for High Performance Supercapacitors

8 Jul 2014, 17:10
1h 50m
D Ring ground level

D Ring ground level

Board: F.29
Poster Presentation Track F - Applied Physics Poster1

Speaker

Mr Damilola Momodu (University of Pretoria)

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

Yes

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

Nickel-Aluminum double hydroxide microspheres (NiAl-DHMs) are a promising electrode material for supercapacitor applications. In this paper, we demonstrate an ex-situ coating method of the active material on Nickel foam-Graphene (NF-G) template serving as a current collector. The structure and surface morphology are studied by scanning and transmission electron microscopies, Raman Spectroscopy and X-ray diffraction analysis. The supercapacitive performance of the microspheres is investigated by cyclic voltammetry (CV), constant charge-discharge (CD) and electrochemical impedance spectroscopy (EIS) measurements. Results show a better surface interaction of the Ni-Al DHM material with the surface of the NF-G template compared with bare Nickel foam (NF) due to an increased contact area. The composite electrode with graphene gives a specific capacitance of 1252 F g-1 at a current density of 1 A g-1. The capacitance retention is about 97 % after 1000 charge-discharge cycles which provides a promising electrode material applicable in the design of energy storage devices.

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD)?

PhD

Main supervisor (name and email)<br>and his / her institution

Prof. Ncholu Manyala,
ncholu.manyala@up.ac.za,
University of Pretoria

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

Yes

Primary author

Mr Damilola Momodu (University of Pretoria)

Co-authors

Mr Bello Abdulhakeem (University of Pretoria) Mr Farshad Barzegar (University of Pretoria) Ms Fatimeh Taghizadeh (University of Pretoria) Dr Julien Dangbegnon (University of Pretoria) Prof. Ncholu Manyala (University of Pretoria)

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