Vadiyar Madagonda M, Liu Xudong, Ye Zhibin
Bharti School of Engineering, Laurentian University, Sudbury, Ontario, P3E 2C6, Canada.
Department of Chemical and Materials Engineering, Concordia University, Montreal, Quebec, H3G 1M8, Canada.
ChemSusChem. 2018 Jul 20;11(14):2410-2420. doi: 10.1002/cssc.201800852. Epub 2018 Jun 26.
The synthesis of porous activated carbon (specific surface area=1883 m g ), Fe O nanoparticles, and carbon-Fe O (C-Fe O ) nanocomposites from local waste thermocol sheets and rusted iron wires is demonstrated herein. The resulting carbon, Fe O nanoparticles, and C-Fe O composites are used as electrode materials for supercapacitor applications. In particular, C-Fe O composite electrodes exhibit a high specific capacitance of 1375 F g at 1 A g and longer cyclic stability with 98 % capacitance retention over 10 000 cycles. Subsequently, an asymmetric supercapacitor, namely, C-Fe O ∥Ni(OH) /carbon nanotube device, exhibits a high energy density of 91.1 Wh kg and a remarkable cyclic stability, with 98 % capacitance retention over 10 000 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.
本文展示了从当地废弃的热塑性塑料片材和生锈的铁丝合成多孔活性炭（比表面积 = 1883 m²/g）、Fe₃O₄纳米颗粒以及碳 - Fe₃O₄（C - Fe₃O₄）纳米复合材料的过程。所得的碳、Fe₃O₄纳米颗粒和C - Fe₃O₄复合材料被用作超级电容器应用的电极材料。特别是，C - Fe₃O₄复合电极在1 A/g电流密度下表现出1375 F/g的高比电容，并且具有更长的循环稳定性，在10000次循环后电容保持率为98%。随后，一种不对称超级电容器，即C - Fe₃O₄∥Ni(OH)₂/碳纳米管器件，表现出91.1 Wh/kg的高能量密度和显著的循环稳定性，在10000次循环后电容保持率为98%。因此，这项工作不仅对高性能超级电容器低成本电极的制造具有重要意义，而且对废弃热塑性塑料片材和生锈铁丝的回收以实现增值再利用也具有重要意义。
