超级电容器
杂原子
材料科学
蜂巢
多孔性
碳纤维
化学工程
兴奋剂
比表面积
纳米技术
复合材料
化学
复合数
电容
有机化学
电极
工程类
戒指(化学)
光电子学
物理化学
催化作用
作者
Samikannu Prabu,Kung‐Yuh Chiang
出处
期刊:Chemosphere
[Elsevier BV]
日期:2024-05-22
卷期号:361: 142400-142400
被引量:11
标识
DOI:10.1016/j.chemosphere.2024.142400
摘要
Supercapacitor electrodes (SCs) of carbon-based materials with flexible structures and morphologies have demonstrated excellent electrical conductivity and chemical stability. Herein, a clean and cost-effective method for producing a 3D self-doped honeycomb-like carbonaceous material with KOH activation from bio-waste oyster shells (BWOSs) is described. A remarkable performance was achieved by the excellent hierarchical structured carbon (HSC-750), which has a large surface area and a reasonably high packing density. The enhanced BWOSs-derived HSC-750 shows an ultrahigh specific capacitance of 525 F/g at 0.5 A g-1 in 3 M KOH electrolyte, as well as high specific surface area (2,377 m2 g-1), pore volume (1.35 cm3 g-1), nitrogen (4.70%), and oxygen (10.58%) doping contents. The SCs also exhibit exceptional cyclic stability, maintaining 98.5% of their capacitance after 10,000 charge/discharge cycles. The two-electrode approach provides a super high energy density of 28 Wh kg-1 at a power density of 250 W kg-1 in an alkaline solution, with remarkable cyclability after 10000 cycles. The study demonstrates the innovative HSC synthesis from BWOSs precursor and cost-effective fabrication of 3D N/O self-doped heteroatom HSC for flexible energy storage.
科研通智能强力驱动
Strongly Powered by AbleSci AI