# Co-BDC MOF/Graphene Nanohybrid as an Efficient Electrode Material for High-Performance Supercapacitors

## 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.

## Key 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 work lies in
the rGO-assisted MOF-to-carbon conversion strategy, which enables
a robust nanoporous carbon/graphene hybrid with suppressed metal leaching
and exceptional long-term stability.