Hierarchical porous carbon nanosheet derived from waste engine oil for high-performance supercapacitor application
Hierarchical porous carbon nanosheet derived from waste engine oil for high-performance supercapacitor application
复制标题
源自废机油的分级多孔碳纳米片用于高性能超级电容器应用
DOI：
10.1039/c8se00449h
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发表时间：
2019-02-01
影响因子：
5.6
通讯作者：
Wang, Yi
中科院分区：
文献类型：
--
作者：
Li, Yubing;Zhang, Deyi;Wang, Yi
高性能、低成本的电极材料是电化学储能器件发展的关键。废机油是一种有毒有害的废弃物，据估计，全世界每年产生约4500万吨废机油。在此，废机油首先被回收作为原料来制备分级多孔碳纳米片。所得材料具有高的比表面积（高达2276 m2 g-1）、分级多孔结构和优异的电容性能。当电流密度从0.5增加到20 A·g（-1）时，其比电容达到352 F·g（-1），保持了初始电容的87.7%以上。此外，在5000次充电和放电循环后没有观察到明显的电容下降。与商业活性炭和大多数废物衍生的多孔碳相比，具有上级电容性能，廉价易得的原材料，以及由于危险废物的适当回收利用而产生的环境效益，使得所报道的分级多孔碳纳米片成为有前途的储能材料。
The utilization of electrode materials with high-performance and low-cost is crucial for the development of electrochemical energy storage devices. Waste engine oil is a toxic and hazardous waste; it is estimated that about 45 million tons of waste engine oil are generated per year worldwide. Herein, waste engine oil was first recycled as a raw material to fabricate hierarchical porous carbon nanosheets. The obtained material exhibited high specific surface area (up to 2276 m(2) g(-1)), hierarchical porous structure, and excellent capacitance performance. Its specific capacitance reached 352 F g(-1), and more than 87.7% of initial capacitance was retained when the current density was increased from 0.5 to 20 A g(-1). In addition, no apparent capacitance drop was observed after 5000 charge and discharge cycles. The superior capacitance performance than that of the commercial activated carbon and most of the waste-derived porous carbons, cheap and readily available raw materials, and environmental benefit due to proper recycling of the hazardous waste make the reported hierarchical porous carbon nanosheet a promising energy storage material.