Conversion of discarded industrial PPS non-woven fabric into heteroatoms co-doped honeycomb-like hierarchical porous carbon for superior performance supercapacitor
Conversion of discarded industrial PPS non-woven fabric into heteroatoms co-doped honeycomb-like hierarchical porous carbon for superior performance supercapacitor
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DOI：
10.1016/j.electacta.2022.141803
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发表时间：
2023-01-04
影响因子：
6.6
通讯作者：
Li, Zhenhuan
中科院分区：
文献类型：
--
作者：
Du, Xi;Zhang, Wenjun;Li, Zhenhuan
实现碳达峰、碳中和，重要的是发展循环经济。其中，固废污染治理是一个重点方向。本文提出了一种环保的方法，将废弃的工业聚苯硫醚（PPS）无纺布纤维转化为具有附加值的多级多孔碳（HPC），用于上级性能的超级电容器。通过氧化、硝化预处理，结合活化、碳化工艺，制备出了具有良好比表面积（3112.2m2g-1）、丰富的杂原子氧（10.85atom %）、氮（4.93atom %）和硫（5.33atom %）共掺杂和分级孔结构的蜂窝状碳材料ONS-HPC-0.5。由于这种结构的优点，ONS-HPC-0.5电极在0.5 A g-1时的比容量高达301 F g-1，在碱性电解液中具有良好的上级速率特性和电化学稳定性。值得注意的是，组装的ONS-HPC-0.5//ONS-HPC-0.5对称超级电容器实现了21.87 Wh kg- 1的显著能量密度和450 W kg-1的功率密度，这不仅展示了这种材料在超级电容器工业中的应用前景，而且为工业固体废物的回收利用开辟了新的循环经济模式。
To achieve carbon peaking and carbon neutrality, it is important to develop a circular economy. Among them, the pollution control of solid waste is a key direction. Herein, an environmentally-friendly method has been proposed to convert the discarded industrial polyphenylene sulfide (PPS) non-woven fabric fiber into value-added hierarchical porous carbon (HPC) for superior performance supercapacitor. Pre-treatment by oxidation and nitrification, combined with activation process and carbonization, the well-organized honeycomb-like car-bon material ONS-HPC-0.5 is obtained with the ultrahigh specific surface area (3112.2 m2 g-1), abundant het-eroatoms oxygen (10.85 atom%), nitrogen (4.93 atom%) and sulfur (5.33 atom%) codoped and hierarchical porous structure. Owing to the structure advantages, the ONS-HPC-0.5 electrode delivers high specific capaci-tance of 301 F g-1 at 0.5 A g-1, superior rate characteristic and electrochemical stability in alkaline electrolyte. Notably, the assembled ONS-HPC-0.5//ONS-HPC-0.5 symmetric supercapacitor achieves the remarkable energy density of 21.87 Wh kg- 1 with power density of 450 W kg -1, which not only demonstrates this material promising application in supercapacitor industry, but also opens up a new circular economy model for the recycling of industrial solid waste.