Key Laboratory of Artificial Structure and Quantum Control, Ministry of Education, Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.
Nanotechnology. 2017 Sep 8;28(36):365402. doi: 10.1088/1361-6528/aa79e4. Epub 2017 Jun 15.
A novel nickel skeleton 3D nitrogen doped graphene (N-GR/NF) superstructure with interconnected graphene nanosheets and nanoscrolls was synthesized using a facile two-step method. By varying the precursor concentration, the assembly of a graphene aerogel can be easily regulated, yielding different micro-structures and morphologies which accelerate the fast electron/ion transportation. The N-GR/NF composites demonstrate enhanced capacitance of 250 F g at 5 A g, good rate performance (237 F g at the current density of 12 A g) and cycle stability (90.9% retention after 5000 cycles) in 1 M KOH electrolyte. This study provides a new strategy for the microporous engineering of graphene gel, promising for further exploitation in various other applications.
采用简便的两步法合成了一种新颖的镍骨架 3D 氮掺杂石墨烯（N-GR/NF）超结构，具有相互连接的石墨烯纳米片和纳米卷。通过改变前体浓度，可以轻松调节石墨烯气凝胶的组装，从而获得不同的微观结构和形态，加速快速的电子/离子传输。在 1 M KOH 电解质中，N-GR/NF 复合材料在 5 A g 时表现出增强的电容 250 F g，良好的倍率性能（在 12 A g 的电流密度下为 237 F g）和循环稳定性（5000 次循环后保持率为 90.9%）。本研究为石墨烯凝胶的微孔工程提供了一种新策略，有望在其他各种应用中进一步开发。
