期刊
NANOSCALE
卷 6, 期 11, 页码 6075-6083出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr00454j
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资金
- National Natural Science Foundation of China for Innovative Research Group [51221462]
- Jiangsu Ordinary University Graduate Innovative Research Programs [CXZZ12_0943, CXZZ13_0952]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1201030C]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
A facile bottom-up strategy was developed to fabricate nitrogen-doped graphene sheets (NGSs) from glucose using a sacrificial template synthesis method. Three main types of nitrogen dopants (pyridinic, pyrrolic and graphitic nitrogens) were introduced into the graphene lattice, and an inimitable microporous structure of NGS with a high specific surface area of 504 m(2) g(-1) was obtained. Particularly, with hybrid features of lithium ion batteries and Faradic capacitors at a low rate and features of Faradic capacitors at a high rate, the NGS presents a superior lithium storage performance. During electrochemical cycling, the NGS electrode afforded an enhanced reversible capacity of 832.4 mA h g(-1) at 100 mA g(-1) and an excellent cycling stability of 750.7 mA h g(-1) after 108 discharge-charge cycles. Furthermore, an astonishing rate capability of 333 mA h g(-1) at 10 000 mA g(-1) and a high rate cycle performance of 280.6 mA h g(-1) even after 1200 cycles were also achieved, highlighting the significance of nitrogen doping on the maximum utilization of graphene-based materials for advanced lithium storage.
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