Controlled growth of redox-active polymer nanorods on MOF-derived activated nanoporous carbons: 3D reconstruction study and high-performance supercapacitor

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 498; p. 155122
• Main Authors: Park, Jinhyeon, Kim, Donggyun, Kim, Semi, Park, Jisoo, Yeol Ryu, Du, Kim, Juyeong, An, Hyosung, Kim, Jeonghun
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.10.2024
• Subjects: 3D reconstruction; Conducting polymer; MOF-derived carbon; Nanoporous materials; Supercapacitor; Supercapacitor; MOF-derived carbon; Nanoporous materials; 3D reconstruction; Conducting polymer
• ISSN: 1385-8947
• DOI: 10.1016/j.cej.2024.155122

[Display omitted] •MOF-derived activated carbon solves the problems of agglomeration of Polyaniline.•3D TEM tomography was used to confirm the uniform growth of PANI nanorods.•The PANI and AZC composite synergistically improves the supercapacitor performance.•P-AZC exhibit excellent electrochemical performance and cycling stability. Supercapacitors, which a energy storage systems, have been continuously studied because of their high power density and rapid charging-discharging capacity. Supercapacitors can be classified into pseudocapacitors and electric double-layer capacitors (EDLCs). The effective utilization of these two supercapacitor mechanisms is important for achieving high performance. In this study, highly nanoporous metal–organic framework (MOF)-derived carbon underwent chemical activation with potassium hydroxide to produce a high surface area. Subsequently, activated carbon was combined with a polyaniline (PANI) nanoarchitecture to introduce redox-active sites. Activated MOF-derived carbon provides a high specific surface area for EDLCs, and well-controlled PANI nanorods support large amounts of redox-active sites to achieve high capacitance. The aniline (ANI) concentration, growth time, acid, temperature, and ammonium persulfate (APS):ANI molar ratio were controlled to grow PANI nanorods without aggregation. At a scan rate of 5 mV/s, the capacitance of the PANI-ZIF-8-derived carbon composite reached 635.3 F/g, which was superior than that of ZIF-8-derived carbon (143.4 F/g). It also exhibited excellent durability during cycling, demonstrating that it can serve as a high-performance hybrid electrode material composed of carbon and polymer for supercapacitors.