Metal-Organic Frameworks for Supercapacitor Applications

Metal-organic frameworks (MOFs) are crystalline, porous materials formed by coordination between metal nodes and multifunctional organic linkers. Their exceptionally high surface areas, tunable pore structures and chemical versatility have positioned them at the forefront of electrode design for supercapacitors. By combining the rapid charge/discharge characteristics of electrochemical double-layer capacitors with pseudocapacitive redox processes, MOF-based electrodes can deliver both high power density and substantial energy storage. Advances in synthetic control have enabled the creation of low-dimensional MOFs, composites and derivatives that enhance electrical conductivity, electrolyte accessibility and cycling durability. Practical implementations span symmetric and asymmetric device architectures, with MOFs serving as active electrode materials, conductive frameworks and sacrificial templates for derived carbons, metal oxides or sulphides. These developments point towards scalable routes for next-generation supercapacitors with improved energy–power trade-offs, long cycle life and reduced environmental impact.

Research from Nature Portfolio

Recent studies have demonstrated that the orientation and interfacial chemistry of MOF crystals can be engineered to unlock intrinsic performance. Self-supported, wall-like MOF arrays grown on carbon nanowalls exhibit uniform alignment, facilitating rapid electron transport and ion diffusion. Computational insight into the MOF–carbon interface revealed that specific coordination at carboxylate terminations stabilises the assembly and preserves electrical connectivity, leading to enhanced capacitance and rate capability. In another advance, hybrid composites integrating manganese or copper MOFs with polyaniline on reduced graphene oxide substrates achieved synergistic improvements. The conductive polymer bridges between MOF particles, while the graphene matrix ensures efficient charge percolation. Such composites delivered specific capacitances approaching three hundred farads per gram and demonstrated robust cycling stability, underscoring the value of combining pseudocapacitive polymers with framework architectures.

Metal-Organic Frameworks for Supercapacitor Applications publication trend

The graph below shows the total number of articles in metal-organic frameworks for supercapacitor applications across all publications each year (not limited to Nature Index journals).

Technical terms

Metal-organic framework (MOF): A porous crystalline material composed of metal ions or clusters coordinated to organic ligands, notable for high surface area and structural tunability.

Supercapacitor: An electrochemical energy storage device offering rapid charge/discharge rates, high power density and long cycling life, often based on double-layer and pseudocapacitance mechanisms.

Electrochemical double-layer capacitance: Charge storage at the electrode–electrolyte interface due to separation of ionic and electronic charges.

Pseudocapacitance: Capacitive behaviour arising from fast, reversible redox reactions at or near the electrode surface, contributing additional charge storage beyond the double layer.

Specific capacitance: The capacitance normalised to electrode mass (farads per gram), indicating the charge storage capability relative to material weight.

Cycling stability: The retention of capacitance and performance over repeated charge/discharge cycles, reflecting electrode durability.

Carbon nanowalls: Vertically aligned, graphene-like carbon sheets used as conductive scaffolds to support and orient MOF growth.

Polyaniline (PANI): A conductive polymer that provides pseudocapacitive contributions and enhances electrical connectivity when integrated with MOF structures.

References

1. Frontiers in metal–organic frameworks: innovative nanomaterials for next-generation supercapacitors. Advanced Composites and Hybrid Materials (2024).
2. Vertically co-oriented two dimensional metal-organic frameworks for packaging enhanced supercapacitive performance. Communications Chemistry (2018).
3. Electrochemical performance of composite electrodes based on rGO, Mn/Cu metal–organic frameworks, and PANI. Scientific Reports (2022).
4. Framework materials for supercapacitors. Nanotechnology Reviews (2022).