# One-Step Fabrication of UiO-66/PVDF/PGE and MOF-199/PVDF/PGE Electrode for High-Performance Supercapacitors

## TL;DR

Researchers developed a cost-effective one-step method to create high-performance supercapacitor electrodes using MOF-based nanofibers.

## Contribution

A one-step electrospinning technique to fabricate MOF-based electrodes with high capacitance and stability.

## Key findings

- UiO-66/PVDF/PGE electrode achieved 1619.26 F/g specific capacitance with 99.16% retention after 3000 cycles.
- MOF-199/PVDF/PGE electrode showed 933.19 F/g capacitance and 102.04% retention after 3000 cycles.
- Electrodes demonstrated improved thermal and structural stability via TGA, DMA, FTIR, and XRD analyses.

## Abstract

With the increasing
importance of energy storage technologies,
the demand for supercapacitors combining high energy density with
fast reversible rechargeability is increasing. However, conventional
multistep synthesis methods increase the production costs and limit
the practical application of these technologies. To solve this problem,
we developed two innovative electrodes, UiO-66/PVDF/PGE and metal–organic
framework (MOF)-199/PVDF/PGE. These electrodes produced with a one-step
electrospinning technique provide a cost-effective solution by simplifying
the fabrication process and reducing costs. The successful incorporation
of MOFs into the polymer matrix was confirmed by Fourier transform
infrared (FTIR) and X-ray diffraction (XRD) analyses, and a homogeneous
nanofiber morphology was observed by scanning electron microscope
(SEM) imaging. Thermogravimetric analysis (TGA) and dynamic mechanical
analysis (DMA) analyses showed significant improvements in the thermal
and structural stability of the composites. The electrochemical properties
were analyzed in detail by cyclic voltammetry (CV) and electrochemical
impedance spectroscopy (EIS) methods. The electrospun UiO-66/PVDF/PGE
electrode demonstrated a high specific capacitance of 1619.26 F/g
with exceptional cycling performance at 1 A/g current density, while
the MOF-199/PVDF/PGE electrode achieved a value of 933.19 F/g. Both
electrodes maintained 99.16 and 102.04% of their initial capacitance
after 3000 cycles, respectively, exhibiting outstanding stability
for long-term energy storage applications. These results demonstrate
that UiO-66/PVDF/PGE and MOF-199/PVDF/PGE are promising as scalable,
high-performance, and cost-effective electrode materials for supercapacitor
technologies.