N-doped pierced graphene microparticles as a highly active electrocatalyst for li-air batteries

Yuan, Tao, Zhang, Weimin, Li, Wen-Ting, Song, Chuantao, He, Yu-Shi, Razal, Joselito M., Ma, Zi-Feng and Chen, Jun 2015, N-doped pierced graphene microparticles as a highly active electrocatalyst for li-air batteries, 2D materials, vol. 2, no. 2, Article number : 024002, pp. 1-7, doi: 10.1088/2053-1583/2/2/024002.

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Title N-doped pierced graphene microparticles as a highly active electrocatalyst for li-air batteries
Author(s) Yuan, Tao
Zhang, Weimin
Li, Wen-Ting
Song, Chuantao
He, Yu-Shi
Razal, Joselito M.ORCID iD for Razal, Joselito M. orcid.org/0000-0002-9758-3702
Ma, Zi-Feng
Chen, Jun
Journal name 2D materials
Volume number 2
Issue number 2
Season Article number : 024002
Start page 1
End page 7
Total pages 7
Publisher IOP Publishing
Place of publication Bristol, U.K.
Publication date 2015-04-13
ISSN 2053-1583
Keyword(s) Science & Technology
Materials Science, Multidisciplinary
Materials Science
Li-air battery
pierced structure
hard template method
Summary In this work we report a novel scalable strategy to prepare a lithium-air battery electrode from 3D Ndoped pierced graphene microparticles (N-PGM) with highly active performance. This approach has combined the merits of spray drying technology and the hard template method. The pierced structured graphene microparticles were characterized physically and electrochemically. An x-ray
photoelectron spectrometer and Raman spectra have revealed that the novel structure possesses a higher N-doping level than conventional graphene without the pierced structure. A much higher BET surface area was also achieved for the N-PGMthan the conventional N-doped graphene microparticles (N-GM). Cyclic voltammetry indicated that the lithium-air battery with the N-PGM electrode has a better utilization for the graphene mass and a higher void volume for Li2O2 formation than that of theN-GMelectrode. N-PGMalso exhibits improved decomposition kinetics for Li oxide
species yielded in the cathodic reaction. Charge and discharge measurements showed that theN-PGM lithium-air battery achieved an improved specific capacity and an enhanced cycle performance than when anN-GMelectrode is used.
Language eng
DOI 10.1088/2053-1583/2/2/024002
Field of Research 091205 Functional Materials
Socio Economic Objective 860406 Synthetic Fibres
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, IOP Publishing
Persistent URL http://hdl.handle.net/10536/DRO/DU:30082322

Document type: Journal Article
Collections: Institute for Frontier Materials
GTP Research
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