Utilizing Waste Thermocol Sheets and Rusted Iron Wires to Fabricate Carbon-Fe3O4 Nanocomposite-Based Supercapacitors: Turning Wastes into Value-Added Materials

作者：Vadiyar Madagonda M; Liu Xudong; Ye Zhibin^*

来源：Chemsuschem, 2018, 11(14): 2410-2420.

DOI：10.1002/cssc.201800852

• carbon
• electrochemistry
• iron
• nanoparticles
• supercapacitors

The synthesis of porous activated carbon (specific surface area=1883 m(2)g(-1)), Fe3O4 nanoparticles, and carbon-Fe3O4 (C-Fe3O4) nanocomposites from local waste thermocol sheets and rusted iron wires is demonstrated herein. The resulting carbon, Fe3O4 nanoparticles, and C-Fe3O4 composites are used as electrode materials for supercapacitor applications. In particular, C-Fe3O4 composite electrodes exhibit a high specific capacitance of 1375 Fg(-1) at 1 Ag-1 and longer cyclic stability with 98% capacitance retention over 10000 cycles. Subsequently, an asymmetric supercapacitor, namely, C-Fe3O4 vertical bar Ni(OH)(2)/carbon nanotube device, exhibits a high energy density of 91.1Whkg(-1) and a remarkable cyclic stability, with 98% capacitance retention over 10000 cycles. Thus, this work has important implications not only for the fabrication of low-cost electrodes for high-performance supercapacitors, but also for the recycling of waste thermocol sheets and rusted iron wires for value-added reuse.