Nanosized graphitic carbon with balanced micro/mesoporosity for robust supercapacitor with superior volumetric capacitance and cyclic performance

作者：Xue, Chunfeng^*; Yang, Fujuan; Wang, Enyang; Feng, Lin; Du, Xiao; Hao, Xiaogang^*; Li, Xupeng

来源：Electrochimica Acta, 2018, 271: 406-416.

DOI：10.1016/j.electacta.2018.03.172

• Supercapacitor
• Cyclic performance
• Volumetric capacitance
• Balanced porosity
• Graphitic carbon

A nanosized graphitic carbon with balanced and connected micro/mesopores is prepared by directly carbonizing Ni(II) cation-exchanged resin at a moderate temperature of 800 degrees C. The homogeneously dispersed Ni nanoparticle well acts as the catalyst for "in-situ" graphitization of the low-cost resin and the porogen for the formation of configured micro- and mesopores. The graphitic carbon GC-800 exhibits a balanced micro/mesoporosity at the ratio of 1:2, which delivers an excellent specific capacitance 66.0 mu F/cm(2) and a high volumetric capacitance of 552.6 F/cm(3) at the current density of 0.50 A/g in the electrolyte of 1.0 M H2SO4. In the dual-electrode system, it also displays high energy density of 7.43 Wh/kg at a power density of 125.0 W/kg. Its superior cyclic performance is not only confirmed by the capacitance retention (95%) after 400 h using the rigid floating technique but also 10000 cycles of GCD measurement at the current density of 5.0 A/g in both double- and triple-electrode systems.

• 出版日期2018-5-1
• 单位太原理工大学; 山西师范大学