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Issue 18, 2016
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Iron–cobalt bimetal decorated carbon nanotubes as cost-effective cathode catalysts for Li–O2 batteries

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Abstract

Despite the extremely high theoretical specific capacity of lithium oxygen (Li–O2) electrochemistry, low energy efficiency resulting from the large potential gap between the discharge and charge makes this system impractical. In this report, an iron cobalt bimetal decorated carbon nanotube (FeCo–CNT) composite was synthesized as a catalytic air cathode material for Li–O2 batteries. An Li–O2 battery using FeCo–CNT air electrodes exhibited higher efficiency (72.15%) than that of pristine CNTs (62.57%) as well as higher capacity (3600 mA h g−1vs. 1276 mA h g−1). Spectroscopic and electron microscopy analyses showed that the improved cell performances can be attributed to the catalytic effect of FeCo. As cost-effective non-noble metal catalysts, FeCo–CNTs demonstrated performance comparable to noble metal catalysts in Li–O2 systems.

Graphical abstract: Iron–cobalt bimetal decorated carbon nanotubes as cost-effective cathode catalysts for Li–O2 batteries

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Supplementary files

Article information


Submitted
23 Dec 2015
Accepted
10 Mar 2016
First published
10 Mar 2016

J. Mater. Chem. A, 2016,4, 7020-7026
Article type
Paper

Iron–cobalt bimetal decorated carbon nanotubes as cost-effective cathode catalysts for Li–O2 batteries

W. Kwak, T. Kang, Y. Sun and Y. J. Lee, J. Mater. Chem. A, 2016, 4, 7020
DOI: 10.1039/C5TA10550A

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