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R-MnO2 nanourchins: a promising catalyst in Li-O2 batteries

Published online by Cambridge University Press:  12 March 2014

Imanol Landa-Medrano ,
Idoia Ruiz de Larramendi ,
Dorleta Jimenez de Aberasturi ,
Ricardo Pinedo ,
Nagore Ortiz-Vitoriano ,
Laura Rioja-Monllor ,
José Ignacio Ruiz de Larramendi  and
Teófilo Rojo
Imanol Landa-Medrano
Affiliation:
Departamento de Química Inorgánica, Universidad del País Vasco (UPV/EHU), Apdo.644, 48080 Bilbao, Spain
Idoia Ruiz de Larramendi
Affiliation:
Departamento de Química Inorgánica, Universidad del País Vasco (UPV/EHU), Apdo.644, 48080 Bilbao, Spain
Dorleta Jimenez de Aberasturi
Affiliation:
Departamento de Química Inorgánica, Universidad del País Vasco (UPV/EHU), Apdo.644, 48080 Bilbao, Spain Fachbereich Physik and WZMW, Philipps Universität Marburg, Marburg, Germany.
Ricardo Pinedo
Affiliation:
Departamento de Química Inorgánica, Universidad del País Vasco (UPV/EHU), Apdo.644, 48080 Bilbao, Spain
Nagore Ortiz-Vitoriano
Affiliation:
Departamento de Química Inorgánica, Universidad del País Vasco (UPV/EHU), Apdo.644, 48080 Bilbao, Spain CIC Energigune, Albert Einstein 48, 0150 Miñano, Spain Electrochemical Energy Laboratory, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
Laura Rioja-Monllor
Affiliation:
Departamento de Química Inorgánica, Universidad del País Vasco (UPV/EHU), Apdo.644, 48080 Bilbao, Spain CIC Energigune, Albert Einstein 48, 0150 Miñano, Spain
José Ignacio Ruiz de Larramendi
Affiliation:
Departamento de Química Inorgánica, Universidad del País Vasco (UPV/EHU), Apdo.644, 48080 Bilbao, Spain
Teófilo Rojo
Affiliation:
Departamento de Química Inorgánica, Universidad del País Vasco (UPV/EHU), Apdo.644, 48080 Bilbao, Spain CIC Energigune, Albert Einstein 48, 0150 Miñano, Spain
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Abstract

In the present work nanostructures of manganese dioxide have been synthesized and characterized as potential catalysts for Li-air batteries. The R-MnO2 nanourchin-shaped catalyst was synthesized by mild hydrothermal conditions under autogeneous pressure. X-ray powder diffraction (XRD) was used to confirm the formation of single R-MnO2. The microstructure of the obtained nanostructures was investigated by scanning and transmission electron microscopy (SEM and TEM) showing the presence of acicular manganese oxide aggregates (5-10 nm wide) which tend to form spherical clusters, taking on an urchin-shaped form of roughly 6 microns diameter. The cyclability analyses reveal an enhanced performance and efficiency for the batteries with higher amounts of catalyst. This catalyst is thought to promote alternative reaction pathways in the Li2CO3 decomposition which attenuate the instability of the electrolyte and/or carbon electrode during the discharge resulting in an improved cyclability.

Keywords

energy storageLicatalytic
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1643: Symposium CC – Advanced Materials for Rechargeable Batteries , 2014 , mrsf13-1643-cc02-04
Copyright
Copyright © Materials Research Society 2014 

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References

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