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

Journal Article


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Abstract


  • In this work we report a novel scalable strategy to prepare a lithium-air battery electrode from 3D N-doped 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-PGM than 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 the N-GM electrode. N-PGM also exhibits improved decomposition kinetics for Li oxide species yielded in the cathodic reaction. Charge and discharge measurements showed that the N-PGM lithium-air battery achieved an improved specific capacity and an enhanced cycle performance than when an N-GM electrode is used.

Authors


  •   Yuan, Tao (external author)
  •   Zhang, Weimin (external author)
  •   Li, Wen-Ting (external author)
  •   Song, Chuantao (external author)
  •   He, Yu-Shi (external author)
  •   Razal, Joselito M. (external author)
  •   Ma, Zi-Feng (external author)
  •   Chen, Jun

Publication Date


  • 2015

Citation


  • Yuan, T., Zhang, W., Li, W., Song, C., He, Y., Razal, J. M., Ma, Z. & Chen, J. (2015). N-doped pierced graphene microparticles as a highly active electrocatalyst for Li-air batteries. 2D Materials, 2 (2), 024002-1-024002-7.

Scopus Eid


  • 2-s2.0-84953299268

Ro Full-text Url


  • https://ro.uow.edu.au/context/aiimpapers/article/2603/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1601

Has Global Citation Frequency


Start Page


  • 024002-1

End Page


  • 024002-7

Volume


  • 2

Issue


  • 2

Place Of Publication


  • United Kingdom

Abstract


  • In this work we report a novel scalable strategy to prepare a lithium-air battery electrode from 3D N-doped 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-PGM than 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 the N-GM electrode. N-PGM also exhibits improved decomposition kinetics for Li oxide species yielded in the cathodic reaction. Charge and discharge measurements showed that the N-PGM lithium-air battery achieved an improved specific capacity and an enhanced cycle performance than when an N-GM electrode is used.

Authors


  •   Yuan, Tao (external author)
  •   Zhang, Weimin (external author)
  •   Li, Wen-Ting (external author)
  •   Song, Chuantao (external author)
  •   He, Yu-Shi (external author)
  •   Razal, Joselito M. (external author)
  •   Ma, Zi-Feng (external author)
  •   Chen, Jun

Publication Date


  • 2015

Citation


  • Yuan, T., Zhang, W., Li, W., Song, C., He, Y., Razal, J. M., Ma, Z. & Chen, J. (2015). N-doped pierced graphene microparticles as a highly active electrocatalyst for Li-air batteries. 2D Materials, 2 (2), 024002-1-024002-7.

Scopus Eid


  • 2-s2.0-84953299268

Ro Full-text Url


  • https://ro.uow.edu.au/context/aiimpapers/article/2603/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1601

Has Global Citation Frequency


Start Page


  • 024002-1

End Page


  • 024002-7

Volume


  • 2

Issue


  • 2

Place Of Publication


  • United Kingdom