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Issue 4, 2017

Bipolar nitrogen-doped graphene frameworks as high-performance cathodes for lithium ion batteries

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Abstract

Hierarchically porous nitrogen-doped graphene frameworks (N-GFs) are fabricated through the ice-templating of GO with polyethylenimine and the thermal treatment of the resultant hybrids. As cathode materials in lithium ion batteries (LIBs), the obtained N-GFs exhibit an outstanding specific capacity of 379 mA h g−1 at 0.5 A g−1 for 2500 cycles. Even at an ultrahigh current density of 5 A g−1, the N-GFs maintain a capacity of 94 mA h g−1, superior to that of most reported LIB cathode materials. The experimental results and quantum mechanics calculations suggest that pyridinic-like N and pyridinic N-oxide in graphene are responsible for the excellent cathodic performance of the bipolar N-GFs by providing fast surface faradaic reactions with both p- and n-doped states.

Graphical abstract: Bipolar nitrogen-doped graphene frameworks as high-performance cathodes for lithium ion batteries

Supplementary files

Article information


Submitted
22 Oct 2016
Accepted
30 Nov 2016
First published
01 Dec 2016

This article is Open Access

J. Mater. Chem. A, 2017,5, 1588-1594
Article type
Paper

Bipolar nitrogen-doped graphene frameworks as high-performance cathodes for lithium ion batteries

Y. Huang, D. Wu, A. Dianat, M. Bobeth, T. Huang, Y. Mai, F. Zhang, G. Cuniberti and X. Feng, J. Mater. Chem. A, 2017, 5, 1588 DOI: 10.1039/C6TA09161J

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