Co-BDC MOF/Graphene Nanohybrid as an Efficient Electrode Material for High-Performance Supercapacitors
Ana L. Braga, Tomaz A. S. Lima, Victor D. S. Fortunato, Danielle D. Justino, Pedro G. R. Gomes, Rayane C. F. Silva, Larissa F. M. A. Vieira, Hélio Ribeiro, Ana Paula C. Teixeira, Paulo F. R. Ortega, Rodrigo L. Lavall, Raquel V. Mambrini, João Paulo C. Trigueiro
TL;DR
A new hybrid material made from a metal-organic framework and graphene is developed for high-performance supercapacitors with excellent stability and capacitance.
Contribution
The rGO-assisted MOF-to-carbon conversion strategy enables a robust hybrid material with suppressed metal leaching and exceptional stability.
Findings
The optimized NPC/rGO-10 electrode achieves 172 F g–1 capacitance with 96% retention after 6,000 cycles.
An asymmetric device (NPC/rGO-10//rGO) maintains 94.4% capacitance over 30,000 cycles.
rGO incorporation reduces Co leaching into the electrolyte, enhancing chemical stability.
Abstract
A Co-BDC metal–organic framework/reduced graphene oxide (rGO) hybrid was synthesized via in-situ MOF growth followed by controlled pyrolysis to obtain a Co-BDC–derived nanoporous carbon (NPC)/rGO electrode for supercapacitors. The rGO-assisted transformation preserves the precursor integrity and yields a uniform, conductive, and porous carbon architecture with well-dispersed Co0 species. The optimized NPC/rGO-10 electrode delivers a specific capacitance of 172 F g–1 at 1 A g–1 with 96% retention after 6,000 cycles. An asymmetric device (NPC/rGO-10//rGO) shows stable operation over 30,000 cycles and maintains 94.4%, emphasizing the outstanding reversibility and structural robustness of the electrode material. Additionally, rGO incorporation reduced the level of Co leaching into the electrolyte, indicating enhanced chemical stability under electrochemical operation. The novelty of this…
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Taxonomy
TopicsSupercapacitor Materials and Fabrication · Graphene research and applications · Advancements in Battery Materials