Wang Qiang, Wen Zhenhai, Li Jinghong
Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
J Nanosci Nanotechnol. 2007 Sep;7(9):3328-31. doi: 10.1166/jnn.2007.679.
The rational selection and assembly of materials are central issues in the development of energy conversion and storage applications. Incorporating the utilization of carbon nanotubes cathode and TiO2 nanotubes anode in energy storage, a nonaqueous hybrid supercapacitor was developed in order to significantly increase the energy density of the supercapacitor. The electrochemical performance of the hybrid supercapacitor is characterized by charge/discharge test and cyclic voltam-mograms. According to the voltage value, the energy density of the asymmetric supercapacitor, by applying a potential varying from 0 to 2.8 V, is found to be 14.4 Wh/kg at upwards of 10 C, which is twice more than for the conventional symmetric supercapacitor utilizing carbon nanotubes, while maintaining desirable cycling stability and rate capability.
材料的合理选择与组装是能量转换和存储应用发展中的核心问题。在能量存储中引入碳纳米管阴极和TiO₂纳米管阳极的应用，开发了一种非水混合超级电容器，以显著提高超级电容器的能量密度。通过充放电测试和循环伏安图对混合超级电容器的电化学性能进行表征。根据电压值，在10 C以上的电流下，施加0至2.8 V的电位时，不对称超级电容器的能量密度为14.4 Wh/kg，是使用碳纳米管的传统对称超级电容器的两倍，同时保持了良好的循环稳定性和倍率性能。
