超级电容器
材料科学
聚苯胺
纳米孔
活性炭
化学工程
电解质
电化学
比表面积
电容
碳化
碳纤维
电流密度
功率密度
聚吡咯
电极
纳米技术
聚合物
复合材料
聚合
化学
吸附
有机化学
复合数
催化作用
物理化学
工程类
功率(物理)
物理
量子力学
扫描电子显微镜
作者
Pinky Saharan,Mandeep Singh,Chandan Kumar,Shashank Sundriyal,Sanjay R. Dhakate
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2023-11-28
卷期号:6 (23): 21909-21921
标识
DOI:10.1021/acsanm.3c04128
摘要
The commercialization of pure carbon-based supercapacitors has faced challenges due to their limited energy density. In order to overcome this challenge, the construction of carbon materials with a hierarchical pore structure has been proposed. Herein, we describe a straightforward template-free method to develop highly nanoporous activated carbon (ACs), via a one-step process where polyaniline (PANI)–polypyrrole (PPy) copolymer is carbonized/activated with KOH in a single step at temperatures ranging from 800 to 1000 °C in N2 environment to get a highly nanoporous ACs. The AC-900 material comprises a network of linked pores and a higher specific surface area of 3899.88 m2/g along with a high electrochemical surface area of 722.05 m2/g, allowing for large amounts of ion storage and quick ion transit. AC-900 has exhibited a very favorable electrochemical performance, in a 1 M H2SO4 electrolyte, a specific capacitance of 1073.9 F/g was achieved when the current density was set to 0.5 A/g. Symmetrical devices were fabricated out of two AC-900 electrodes of equivalent weight, and the results demonstrate that the AC-900//AC-900 device at a power density of approximately 868 W/kg. The device reaches a noteworthy energy density of ∼72 W h/kg, while also demonstrating very high cyclic stability with an efficiency of approximately 100% even after undergoing 6,000 charge–discharge cycles. The impressive electrochemical performance displayed by AC-900 underscores its significant potential as a polymer-derived carbon nanomaterial for electrodes in supercapacitor applications.
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