A highly nitrogen-doped porous graphene - an anode material for lithi
By Sui, Zhu-Yin; Wang, Caiyun; Yang, Quan-Sheng; Shu, Kewei; Liu, Yu-Wen; Han, Bao-Hang & Wallace, Gordon G.
Published in J. Mater. Chem. A
The Royal Society of Chemistry
2015
Abstract
A novel nitrogen-doped porous graphene material (NPGM) was prepared by freeze-drying a graphene/melamine-formaldehyde hydrogel and subsequent thermal treatment. The use of melamine-formaldehyde resin as a cross-linking agent and nitrogen source enhances the nitrogen content. NPGM possesses a hierarchical porous structure, a large Brunauer-Emmett-Teller surface area (up to 1170 m2 g-1), and a considerable nitrogen content (5.8 at%). NPGM displays a discharge capacity of 672 mA h g-1 at a current density of 100 mA g-1 when used as an anode material for lithi