超级电容器
材料科学
聚苯胺
石墨氮化碳
化学工程
聚合
氮化物
电化学
氮化硼
氮化碳
电导率
混合材料
碳纤维
纳米技术
电极
复合材料
复合数
化学
有机化学
催化作用
聚合物
物理化学
工程类
图层(电子)
光催化
作者
Manuel Eduardo Martínez-Cartagena,Juan Bernal-Martínez,Arnulfo Banda-Villanueva,Francisco Javier Enríquez-Medrano,Víctor Lechuga-Islas,Ilse Magaña,Teresa Córdova,D. Morales-Acosta,José Luis Olivares-Romero,Ramón Díaz de León
出处
期刊:Polymers
[MDPI AG]
日期:2022-09-19
卷期号:14 (18): 3913-3913
标识
DOI:10.3390/polym14183913
摘要
Polyaniline (PANI) composites have gained momentum as supercapacitive materials due to their high energy density and power density. However, some drawbacks in their performance remain, such as the low stability after hundreds of charge-discharge cycles and limitations in the synthesis scalability. Herein, we report for the first time PANI-Graphitic oxidized carbon nitride composites as potential supercapacitor material. The biomimetic polymerization of aniline assisted by hematin, supported by phosphorous and oxygen-modified carbon nitrides (g-POCN and g-OCN, respectively), achieved up to 89% yield. The obtained PAI/g-POCN and PANI/g-OCN show enhanced electrochemical properties, such as conductivity of up to 0.0375 S/cm, specific capacitances (Cs) of up to 294 F/g (at high current densities, 5 A/g) and a stable operation after 500 charge-discharge cycles (at 3 A/g). In contrast, the biomimetic synthesis of Free PANI, assisted by stabilized hematin in cosolvents, exhibited lower performance properties (65%). Due to their structural differences, the electrochemical properties of Free PANI (conductivity of 0.0045 S/cm and Cs of up to 82 F/g at 5 A/g) were lower than those of nanostructured PANI/g-POCN and g-OCN supports, which provide stability and improve the properties of biomimetically synthesized PANI. This work reveals the biomimetic synthesis of PANI, assisted by hematin supported by modified carbon nitrides, as a promising strategy to produce nanostructured supercapacitors with high performance.
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