Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China.
Phys Chem Chem Phys. 2011 Oct 14;13(38):17249-54. doi: 10.1039/c1cp22409c. Epub 2011 Aug 30.
Self-assembled graphene organogel (SGO) with 3-dimensional (3D) macrostructure was prepared by solvothermal reduction of a graphene oxide (GO) dispersion in propylene carbonate (PC). This SGO was used as an electrode material for fabricating supercapacitors with a PC electrolyte. The supercapacitor can be operated in a wide voltage range of 0-3 V and exhibits a high specific capacitance of 140 F g(-1) at a discharge current density of 1 A g(-1). Furthermore, it can still keep a specific capacitance of 90 F g(-1) at a high current density of 30 A g(-1). The maximum energy density of the SGO based supercapacitor was tested to be 43.5 Wh kg(-1), and this value is higher than those of the graphene based supercapacitors with aqueous or PC electrolytes reported previously. Furthermore, at a high discharge current density of 30 A g(-1), the energy and power densities of the supercapacitor were measured to be 15.4 Wh kg(-1) and 16,300 W kg(-1), respectively. These results indicate that the supercapacitor has a high specific capacitance and power density, and excellent rate capability.
自组装石墨烯有机凝胶（SGO）具有三维（3D）宏观结构，通过在碳酸丙烯酯（PC）中溶剂热还原氧化石墨烯（GO）分散体制备。将 SGO 用作具有 PC 电解质的超级电容器的电极材料。该超级电容器可在 0-3 V 的宽电压范围内工作，并在 1 A g(-1) 的放电电流密度下表现出 140 F g(-1) 的高比电容。此外，它在 30 A g(-1) 的高电流密度下仍能保持 90 F g(-1) 的比电容。基于 SGO 的超级电容器的最大能量密度被测试为 43.5 Wh kg(-1)，高于先前报道的具有水性或 PC 电解质的基于石墨烯的超级电容器的值。此外，在 30 A g(-1) 的高放电电流密度下，超级电容器的能量和功率密度分别测量为 15.4 Wh kg(-1)和 16300 W kg(-1)。这些结果表明该超级电容器具有高比电容和功率密度，以及出色的倍率性能。
