Selvaraj Kumar, Yu Bin, Spontón Marisa E, Kumar Premnath, Veerasamy Uma Shankar, Arulraj Arunachalam, Mangalaraja Ramalinga Viswanathan, Almarhoon Zainab M, Sayed Shaban R M, Kannaiyan Dinakaran
State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, P. R. China.
Instituto de Desarrollo Tecnológico para la Industria Química (INTEC), CONICET, Ruta Nacional 168, Km. 0, Santa Fe, 3000, Argentina.
Soft Matter. 2024 Oct 9;20(39):7957-7969. doi: 10.1039/d4sm00920g.
In this work, a straightforward and scalable method was used to generate nitrogen-rich porous carbon (NRPC), which was then incorporated with a graphitic carbon nitride and magnetite (g-CN/FeO) nanocomposite, fabricated with FeO nanoparticles as an eco-friendly and economically viable component. The fabricated NRPC/g-CN/FeO nanocomposite was applied as an electrode in supercapacitor applications. The synthesized NRPC/g-CN/FeO nanocomposite, NRPC, g-CN, and FeO were characterized by analytical and morphological analyses. The spherically shaped FeO nanoparticles were analyzed by field-emission scanning electron microscopy (FE-SEM) and high-resolution transmission electron microscopy (HR-TEM). The specific surface area of NRPC/g-CN/FeO was determined to be 479 m g. All the crosslinked composites showed exceptional electrochemical performance and exhibited a pseudo-capacitance behaviour. In comparison to the FeO and g-CN/FeO electrodes, the NRPC/g-CN/FeO electrode showed a lower charge-transfer resistance and higher capacitance. The prepared NRPC/g-CN/FeO electrode exhibited the highest specific capacitance of 385 F g at 1 A g compared to FeO (112 F g) and g-CN/FeO (150 F g). Furthermore, the cycling efficiency of NRPC/g-CN/FeO remained at 94.3% even after 2000 cycles. The introduction of NRPC to g-CN/FeO improved its suitability for application in high-performance supercapacitors.
在这项工作中，采用了一种直接且可扩展的方法来制备富氮多孔碳（NRPC），然后将其与石墨相氮化碳和磁铁矿（g-CN/FeO）纳米复合材料相结合，该复合材料以FeO纳米颗粒作为一种环保且经济可行的成分制备而成。所制备的NRPC/g-CN/FeO纳米复合材料被用作超级电容器应用中的电极。通过分析和形态学分析对合成的NRPC/g-CN/FeO纳米复合材料、NRPC、g-CN和FeO进行了表征。通过场发射扫描电子显微镜（FE-SEM）和高分辨率透射电子显微镜（HR-TEM）对球形FeO纳米颗粒进行了分析。NRPC/g-CN/FeO的比表面积测定为479 m²/g。所有交联复合材料均表现出优异的电化学性能，并呈现出赝电容行为。与FeO和g-CN/FeO电极相比，NRPC/g-CN/FeO电极显示出更低的电荷转移电阻和更高的电容。所制备的NRPC/g-CN/FeO电极在1 A/g电流密度下表现出最高比电容385 F/g，相比之下FeO为112 F/g，g-CN/FeO为150 F/g。此外，即使经过2000次循环，NRPC/g-CN/FeO的循环效率仍保持在94.3%。将NRPC引入g-CN/FeO提高了其在高性能超级电容器中的应用适用性。
