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Issue 111, 2015
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Nitrogen-doped holey graphene foams for high-performance lithium storage

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Abstract

Although lithium ion batteries have gained commercial success in abundant portable devices, they still lack suitable electrode materials with high capacities and rate capabilities critical for broad applications. Herein, we demonstrate a facile and scalable approach toward nitrogen-doped holey graphene foams (NHGFs) via simultaneous etching and assembling of graphene oxide and subsequent annealing treatments. The resultant NHGFs possess some unique structural features such as hierarchically interconnected pores in the foams and a nitrogen-doped holey structure in the basal plane of the graphene walls, which facilitate the fast diffusion of both lithium and electrons through the NHGFs and meanwhile significantly improve electrochemical activity. As a result, the NHGFs exhibit excellent electrochemical performances for lithium storage, including a high reversible capacity (1194 mA h g−1), good high-rate capability (420 mA h g−1 at 5C) and long cycling stability with negligible capacity loss after 1000 continuous cycles.

Graphical abstract: Nitrogen-doped holey graphene foams for high-performance lithium storage

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Article information


Submitted
19 Sep 2015
Accepted
15 Oct 2015
First published
15 Oct 2015

RSC Adv., 2015,5, 91114-91119
Article type
Paper

Nitrogen-doped holey graphene foams for high-performance lithium storage

J. Sun, L. Wang, R. Song and S. Yang, RSC Adv., 2015, 5, 91114
DOI: 10.1039/C5RA19313C

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