Pouch-Type Asymmetric Supercapacitor Based on Nickel-Cobalt Metal-Organic Framework.

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Bimetal-organic frameworks (BMOFs) offer tunable properties for energy storage.
• Enhanced charge transfer in BMOFs improves electrode electroactivity.

Purpose of the Study:

• To synthesize a novel NiCo-MOF (NCMF) with a hierarchical nanorod structure.
• To evaluate NCMF as an electrode material in a hybrid pouch-type asymmetric supercapacitor device (HPASD).

Main Methods:

• Facile solvo-hydrothermal synthesis of NCMF.
• Assembly of an HPASD using NCMF as the positive electrode and activated carbon as the negative electrode with a gel electrolyte (KOH+PVA).

Main Results:

• The assembled HPASD achieved a specific capacitance of 161 F·g^-1 at 0.5 A·g^-1.
• The device exhibited an energy density of 50.3 Wh·kg^-1 at 375 W·kg^-1.
• The supercapacitor maintained 87.6% of its capacitance after 6000 cycles.

Conclusions:

• The synthesized NCMF is a promising high-energy-density electrode material for supercapacitors.
• The facile synthesis strategy is suitable for developing advanced electrode materials for energy storage.