Department of Nanomaterials Physicochemistry, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, al. Piastów 45, 70-311, Szczecin, Poland; Chongqing Shuoyingfeng New Energy Technology Co, No. 5 Gangqiao Branch Road, Jiangbei District, Chongqing, 400026, China.
Department of Nanomaterials Physicochemistry, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, al. Piastów 45, 70-311, Szczecin, Poland.
Chemosphere. 2023 Nov;340:139865. doi: 10.1016/j.chemosphere.2023.139865. Epub 2023 Aug 18.
Disposable aluminum cans and plastic bottles are common wastes found in modern societies. This article shows that they can be upcycled into functional materials, such as metal-organic frameworks and hierarchical porous carbon nanomaterials for high-value applications. Through a solvothermal method, used poly(ethylene terephthalate) bottles and aluminum cans are converted into MIL-53(Al). Subsequently, the as-prepared MIL-53(Al) can be further carbonized into a nitrogen-doped (4.52 at%) hierarchical porous carbon framework. With an optical amount of urea present during the carbonization process, the carbon nanomaterial of a high specific surface area of 1324 m g with well-defined porosity can be achieved. These features allow the nitrogen-doped hierarchical porous carbon to perform impressively as the working electrode of supercapacitors, delivering a high specific capacitance of 355 F g at 0.5 A g in a three-electrode cell and exhibiting a high energy density of 20.1 Wh kg at a power density of 225 W kg, while simultaneously maintaining 88.2% capacitance retention over 10,000 cycles in two-electrode system. This work demonstrates the possibility of upcycling wastes to obtain carbon-based high-performance supercapacitors.
一次性铝罐和塑料瓶是现代社会常见的废物。本文展示了它们可以被升级再造为功能性材料，如金属有机骨架和分级多孔碳纳米材料，用于高价值的应用。通过溶剂热法，使用废弃的聚对苯二甲酸乙二醇酯瓶和铝罐转化为 MIL-53(Al)。随后，所制备的 MIL-53(Al)可以进一步碳化形成氮掺杂（4.52%原子比）的分级多孔碳骨架。在碳化过程中加入少量的尿素，可得到具有高比表面积（1324 m² g）和明确孔结构的氮掺杂分级多孔碳纳米材料。这些特性使得氮掺杂分级多孔碳作为超级电容器的工作电极表现出色，在三电极电池中具有 355 F g 的高比电容，在 225 W kg 的功率密度下具有 20.1 Wh kg 的高能量密度，同时在两电极系统中经过 10000 次循环后仍保持 88.2%的电容保持率。这项工作证明了通过升级再造废物来获得基于碳的高性能超级电容器的可能性。
