High-throughput fabrication of strutted graphene by ammonium-assisted chemical blowing for high-performance supercapacitors
High-throughput fabrication of strutted graphene by ammonium-assisted chemical blowing for high-performance supercapacitors
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DOI：
10.1016/j.nanoen.2015.06.008
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发表时间：
2015-09-01
期刊：
影响因子：
17.6
通讯作者：
Golberg, Dmitri
中科院分区：
文献类型：
--
作者：
Jiang, Xiang-Fen;Wang, Xue-Bin;Golberg, Dmitri
三维石墨烯最需要将石墨烯独特的纳米级性质传递到宏观尺度，但其实际生产仍然不足。在此，我们建立了一种通用的合成方法，即通过将蔗糖发泡到蔗糖衍生聚合物的气泡网络中进行铵辅助化学发泡，以有效地生产三维支撑石墨烯（SG）。 SG由相互连接的单层/多层石墨烯膜组成，由石墨支柱支撑，不会重新堆叠或团聚，从而充分暴露巨大的表面并具有适当的孔隙率。 SG进一步用作超级电容器的无添加剂/无粘合剂电极，由于表面积大、优异的互连性和孔隙率，实现了50W h kg(-1)的高能量密度和340 kW kg(-1)的高最大功率密度。大规模生产的自支撑SG将为石墨烯开辟广阔的视野，并为石墨烯的大规模应用提供丰富的潜力。 (C) 2015 Elsevier Ltd. 保留所有权利。
Three dimensional graphenes are most desired to deliver the unique nano-sized properties of graphenes to the macro-scale, yet their practical production remains insufficient. Herein we establish a general synthesis approach, i.e. ammonium-assisted chemical blowing via foaming sucrose into the bubble networks of sucrose-derived polymers, to effectively produce three dimensional strutted graphenes (SGs). SG consists of interconnected mono-/few-layered graphene membranes scaffolded by graphitic struts without restacking or agglomeration, which thus fully exposes the huge surface and possesses appropriate porosity. The SG is further applied as additive/binder-free electrodes for supercapacitors, which realize the high energy density of 50W h kg(-1) and the high maximum-power-density of 340 kW kg(-1) due to the large surface area, excellent interconnectivity and porosity. The mass-produced self-supporting SG would open up a wide horizon and enable the abundant potentials of graphenes for promising large-scale applications. (C) 2015 Elsevier Ltd. All rights reserved.