From crude oil production nuisance to promising energy storage material: Development of high-performance asphaltene-derived supercapacitors
From crude oil production nuisance to promising energy storage material: Development of high-performance asphaltene-derived supercapacitors
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DOI：
10.1016/j.fuel.2019.116641
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发表时间：
2020-03-01
期刊：
影响因子：
7.4
通讯作者：
Vargas, Francisco M.
中科院分区：
文献类型：
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作者：
Enayat, Shayan;Tran, Mai K.;Vargas, Francisco M.
超级电容器要求使用具有高表面积、热稳定性和环境稳定性、低成本和良好导电性的电极材料。沥青质是原油生产中一个不受欢迎且存在问题的部分，是一种具有成本效益的材料，当被激活后，它可以提供理想的性能，用于储能设备。在这项工作中，设计了一种新的简单的方法来化学激活沥青烯，使用市售的三聚氰胺海绵作为模板，形成一个相互连接的多孔碳网络。沥青质衍生碳的表面积高达3868 m(2)g(-1)，在标准水电解质中的电化学电容高达197.3F g（-1）。在对基于沥青烯电极的超级电容器装置进行了10,000次循环测试后，其电容保留了89.9%，表明该储能装置具有良好的稳定性。此外，将沥青烯电极与“盐包水”电解质结合使用，显示出更高电压超级电容器的潜力，工作电压高达2.5 V，能量密度为31Wh kg（-1）。这些结果表明，目前被认为是不受欢迎的原油部分，有可能沉积在井眼、管道和下游设施中，可以重新利用成一种具有显著储能性能的理想材料。
Supercapacitors require the use of electrode materials exhibiting high surface area, thermal and environmental stability, low cost and good conductivity. Asphaltene, an undesired and problematic fraction of crude oil production, is one such cost-effective material that when activated, can provide desirable properties to be used in energy storage devices. In this work, a new and simple method to chemically activate asphaltene was designed using commercially available melamine sponges as a template to form an interconnected porous carbon network. The asphaltene derived carbon showed a surface area as high as 3868 m(2)g(-1), and electrochemical capacitance in a standard aqueous electrolyte as high as 197.3F g(-1) has been realized. After testing the asphaltene electrode-based supercapacitor device for 10,000 cycles, 89.9% of its capacitance was retained, indicating good stability for an energy storage device. Additionally, the use of asphaltene electrodes with "water-in-salt" electrolyte showed potential for higher voltage supercapacitors operating up to 2.5 V, with an energy density of 31Wh kg(-1). These results suggest that what is currently considered an undesirable fraction of the crude oil, which has a tendency to deposit in wellbores, pipelines, and downstream facilities can be repurposed into a desirable material with remarkable properties for energy storage.