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.
| Original language | English |
|---|---|
| Article number | 1800176 |
| Number of pages | 9 |
| Journal | Particle and Particle Systems Characterization |
| Volume | 35 |
| Issue number | 10 |
| Early online date | 9 Aug 2018 |
| DOIs | |
| Publication status | Published - Oct 2018 |
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Morphology and Crystal Planes Effects on Supercapacitance of CeO2 Nanostructures : Electrochemical and Molecular Dynamics Studies. / Jeyaranjan, Aadithya; Sakthivel, Tamil Selvan; Molinari, Marco; Sayle, Dean C.; Seal, Sudipta.
In: Particle and Particle Systems Characterization, Vol. 35, No. 10, 1800176 , 10.2018.Research output: Contribution to journal › Article
TY - JOUR
T1 - Morphology and Crystal Planes Effects on Supercapacitance of CeO2 Nanostructures
T2 - Electrochemical and Molecular Dynamics Studies
AU - Jeyaranjan, Aadithya
AU - Sakthivel, Tamil Selvan
AU - Molinari, Marco
AU - Sayle, Dean C.
AU - Seal, Sudipta
PY - 2018/10
Y1 - 2018/10
N2 - 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.
AB - 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.
KW - cerium oxide
KW - crystal plane effects
KW - energy storage
KW - molecular dynamics simulations
KW - supercapacitors
UR - http://www.scopus.com/inward/record.url?scp=85052461920&partnerID=8YFLogxK
U2 - 10.1002/ppsc.201800176
DO - 10.1002/ppsc.201800176
M3 - Article
AN - SCOPUS:85052461920
VL - 35
JO - Particle and Particle Systems Characterization
JF - Particle and Particle Systems Characterization
SN - 0934-0866
IS - 10
M1 - 1800176
ER -