Morphology and Crystal Planes Effects on Supercapacitance of CeO2 Nanostructures: Electrochemical and Molecular Dynamics Studies

Jeyaranjan, Aadithya and Sakthivel, Tamil Selvan and Molinari, Marco and Sayle, Dean C. and Seal, Sudipta (2018) Morphology and Crystal Planes Effects on Supercapacitance of CeO2 Nanostructures: Electrochemical and Molecular Dynamics Studies. Particle & Particle Systems Characterization, 35 (10). p. 1800176. ISSN 0934-0866. (doi:https://doi.org/10.1002/ppsc.201800176) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided)

PDF - Author's Accepted Manuscript
Restricted to Repository staff only until 9 August 2019.
Contact us about this Publication Download (6MB)
[img]
PDF - Publisher pdf
Restricted to Repository staff only
Contact us about this Publication Download (2MB)
[img]
Official URL
https://doi.org/10.1002/ppsc.201800176

Abstract

Nano cerium oxide (CeO2) is a promising supercapacitor material, but the effect of morphology on charge storage capacity remains elusive. To determine this effect, three different morphologies, nanorods, cubes, and particles are synthesized by a one-step hydrothermal process. Electrochemical evaluation through cyclic voltammetry and galvanostatic charge–discharge techniques reveals specific capacitance to be strongly dependent on the nanostructure morphology. The highest specific capacitance in nanorods (162.47 F g?1) is due to the substantially larger surface area relative to the other two morphologies and the predominant exposure of the highly reactive {110} and {100} planes. At comparable surface areas, exposed crystal planes exhibit a profound effect on charge storage. The exposure of highly reactive {100} planes in nanocubes induce a greater specific capacitance compared to nanoparticles, which are dominated by the less reactive {111} facets. The experimental findings are supported by reactivity maps of the nanostructures generated by molecular dynamics simulations. This study indicates that supercapacitors with higher charge storage can be designed through a nanostructure morphology selection strategy.

Item Type: Article
Subjects: Q Science > QD Chemistry > QD478 Solid State Chemistry
Q Science > QD Chemistry > QD473 Physical properties in relation to structure
Divisions: Faculties > Sciences > School of Physical Sciences
Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Dean Sayle
Date Deposited: 21 Aug 2018 11:55 UTC
Last Modified: 09 Nov 2018 16:27 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/68743 (The current URI for this page, for reference purposes)
Sayle, Dean C.: https://orcid.org/0000-0001-7227-9010
  • Depositors only (login required):

Downloads

Downloads per month over past year