Key Laboratory for Functional Polymer Materials and Center for Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
Sci Rep. 2013;3:1408. doi: 10.1038/srep01408.
Until now, few sp(2) carbon materials simultaneously exhibit superior performance for specific surface area (SSA) and electrical conductivity at bulk state. Thus, it is extremely important to make such materials at bulk scale with those two outstanding properties combined together. Here, we present a simple and green but very efficient approach using two standard and simple industry steps to make such three-dimensional graphene-based porous materials at the bulk scale, with ultrahigh SSA (3523 m(2)/g) and excellent bulk conductivity. We conclude that these materials consist of mainly defected/wrinkled single layer graphene sheets in the dimensional size of a few nanometers, with at least some covalent bond between each other. The outstanding properties of these materials are demonstrated by their superior supercapacitor performance in ionic liquid with specific capacitance and energy density of 231 F/g and 98 Wh/kg, respectively, so far the best reported capacitance performance for all bulk carbon materials.
到目前为止，很少有 sp2 碳材料在块体状态下同时具有优异的比表面积（SSA）和电导率。因此，非常重要的是要在块体规模上制造具有这两种优异性能的材料。在这里，我们提出了一种简单、绿色但非常有效的方法，使用两种标准且简单的工业步骤来大规模制造这种基于三维石墨烯的多孔材料，具有超高的 SSA（3523 m2/g）和优异的体电导率。我们得出的结论是，这些材料主要由几纳米尺寸的有缺陷/皱折的单层石墨烯片组成，彼此之间至少有一些共价键。这些材料的优异性能通过其在离子液体中的超级电容器性能得到了证明，比电容和能量密度分别为 231 F/g 和 98 Wh/kg，是迄今为止所有块状碳材料中报道的最佳电容性能。
