In situ, facile synthesis of La0.8Sr0.2MnO3/nitrogen-doped graphene: a high-performance catalyst for rechargeable Li-O2 batteries

In situ, facile synthesis of La0.8Sr0.2MnO3/nitrogen-doped graphene: a high-performance catalyst... We have successfully devised a simple method to synthesize La0.8Sr0.2MnO3 with nitrogen-doped graphene composites (LSM/NrGO) and investigated their catalytic performance in the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Interestingly, the LSM/NrGO composites demonstrate outstanding catalytic performance in ORR, including high limiting current density and superior onset potential, compared to bare LSM nanocrystals or nitrogen-doped graphene, showing a performance close to that of commercial Pt/C. Moreover, Li-O2 batteries assembled based on the LSM/NrGO catalysts exhibited brilliant performance, especially during long-term cycling, where the terminal discharge voltage still exceeded 2.31 V after 360 cycles. The excellent catalytic performance is mainly attributed to the large specific surface area (152.24 m2 g−1) of the materials, which provides many catalytic active sites, and the mesoporous structure (2 to 50 nm), which can facilitate the penetration of oxygen molecules into the surface of the nanoparticles and mass transfer. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

In situ, facile synthesis of La0.8Sr0.2MnO3/nitrogen-doped graphene: a high-performance catalyst for rechargeable Li-O2 batteries

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Publisher
Springer Journals
Copyright
Copyright © 2017 by Springer-Verlag Berlin Heidelberg
Subject
Chemistry; Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials; Condensed Matter Physics; Energy Storage
ISSN
0947-7047
eISSN
1862-0760
D.O.I.
10.1007/s11581-017-2079-9
Publisher site
See Article on Publisher Site

Abstract

We have successfully devised a simple method to synthesize La0.8Sr0.2MnO3 with nitrogen-doped graphene composites (LSM/NrGO) and investigated their catalytic performance in the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Interestingly, the LSM/NrGO composites demonstrate outstanding catalytic performance in ORR, including high limiting current density and superior onset potential, compared to bare LSM nanocrystals or nitrogen-doped graphene, showing a performance close to that of commercial Pt/C. Moreover, Li-O2 batteries assembled based on the LSM/NrGO catalysts exhibited brilliant performance, especially during long-term cycling, where the terminal discharge voltage still exceeded 2.31 V after 360 cycles. The excellent catalytic performance is mainly attributed to the large specific surface area (152.24 m2 g−1) of the materials, which provides many catalytic active sites, and the mesoporous structure (2 to 50 nm), which can facilitate the penetration of oxygen molecules into the surface of the nanoparticles and mass transfer.

Journal

IonicsSpringer Journals

Published: Apr 3, 2017

References

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