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Issue 42, 2018
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A porous Co–Ru@C shell as a bifunctional catalyst for lithium–oxygen batteries

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Abstract

We use SiO2 as a template and dopamine as a carbon source to synthesize a hollow C shell, and we load Co and Ru nanoparticles onto it to obtain a Co–Ru@C shell composite. The diameter and thickness of the C shell are 100 nm and 5–10 nm, respectively, and numerous holes of different sizes exist on the C shell. Meanwhile, numerous C shells stack together to form macropores, thereby forming a hierarchical porous structure in the material. Brunauer–Emmett–Teller surface area analysis reveals that the specific surface area and pore volume of the Co–Ru@C shell are 631.57 m2 g−1 and 2.20 cc g−1, respectively, which can result in many three-phase interfaces and provide more space for the deposition of discharge products. Compared with Co@C shell and C shell electrodes, the obtained Co–Ru@C shell-based electrodes exhibit the highest discharge capacity, the lowest oxygen reduction reaction/oxygen evolution reaction overpotential and the best cycle stability, indicating the excellent catalytic ability of the Co–Ru@C shell.

Graphical abstract: A porous Co–Ru@C shell as a bifunctional catalyst for lithium–oxygen batteries

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Supplementary files

Article information


Submitted
15 May 2018
Accepted
16 Jun 2018
First published
02 Jul 2018

This article is Open Access

RSC Adv., 2018,8, 23973-23980
Article type
Paper

A porous Co–Ru@C shell as a bifunctional catalyst for lithium–oxygen batteries

X. Chen, X. Zhang, C. Chen, T. Huang and A. Yu, RSC Adv., 2018, 8, 23973
DOI: 10.1039/C8RA04144J

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

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    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
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    [Original citation] - Published by The Royal Society of Chemistry.

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