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[×ÊÔ´] Nature CommunicationÉÏÓÃÓÚ³¬¼¶µçÈÝÆ÷µÄÈýάʯīϩ

Three-dimensional strutted graphene grown by substrate-free sugar blowing for high-power-density supercapacitors
Xuebin Wang, Yuanjian Zhang, Chunyi Zhi et al.
Abstact
Three-dimensional graphene architectures in the macroworld can in principle maintain all the
extraordinary nanoscale properties of individual graphene flakes. However, current 3D graphene
products suffer from poor electrical conductivity, low surface area and insufficient
mechanical strength/elasticity; the interconnected self-supported reproducible 3D graphenes
remain unavailable. Here we report a sugar-blowing approach based on a polymeric
predecessor to synthesize a 3D graphene bubble network. The bubble network consists of
mono- or few-layered graphitic membranes that are tightly glued, rigidly fixed and spatially
scaffolded by micrometre-scale graphitic struts. Such a topological configuration provides
intimate structural interconnectivities, freeway for electron/phonon transports, huge accessible
surface area, as well as robust mechanical properties. The graphene network thus overcomes
the drawbacks of presently available 3D graphene products and opens up a wide
horizon for diverse practical usages, for example, high-power high-energy electrochemical capacitors, as highlighted in this work.

[ Last edited by ľ·º°× on 2013-12-27 at 11:50 ]
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