超级电容器
聚苯胺
材料科学
杂原子
化学工程
比表面积
纳米技术
多孔性
碳纤维
复合材料
聚合物
电容
复合数
化学
聚合
电极
有机化学
物理化学
戒指(化学)
催化作用
工程类
作者
Guosai Jiang,Jiaqi Cai,Mohanapriya Krishnamoorthy,Raja Arumugam Senthil,Yanzhi Sun,Xifei Li,Junqing Pan
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2022-03-22
卷期号:5 (4): 4138-4148
被引量:29
标识
DOI:10.1021/acsaem.1c03478
摘要
The preparation of porous carbon (PC) with a unique morphology, appropriate pore size distribution, and heteroatom doping has been a major challenge for high-performance supercapacitors. Herein, we developed nematosphere-like N-doped porous carbon (NNPC) via the activation of a polyaniline@PC (PANI@PC) composite that was acquired through PANI in situ growth on the surface of PC derived from Al-MOF (MOF, metal–organic framework). The as-prepared NNPC material possesses a huge specific surface area of up to 2360 m2 g–1 as well as a pore volume of 1.15 cm3 g–1, exhibiting an excellent specific capacitance (346 F g–1 at 1 A g–1) and amazing rate performance with 78.3% capacitance retention when the working current density swells from 1 to 100 A g–1. In addition, the electrode material also displays an extraordinary cyclic stability with an extremely low capacitance loss of 5.9% over 100 000 cycles at 50 A g–1. Furthermore, this NNPC-based symmetric supercapacitor delivers a superior energy density of 23.7 W h kg–1 in 6 M KOH with a 0–1.4 V operating voltage. These outstanding electrochemical performances are attributed to the nematosphere-like morphology, hierarchical pore structure, and enhanced electrical conductivity of NNPC for fast ion/charge migration and exchange. This work proposes a strategy to develop innovative electrode materials by combining MOF-derived PC and N-rich polymer for supercapacitor applications.
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