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In Situ Polymerized Polyaniline in Redox-Active Metal-Organic Polyhedra for Supercapacitors
Yan-Ling Chang1, Fuerkaiti Tayier2,3, Cheng-Yan Hsieh1
1Department of Chemical Engineering, National Cheng Kung University, Tainan City 70101, Taiwan.
ACS Applied Materials & Interfaces
|June 12, 2026
Summary
Researchers enhanced polyaniline (PANI) performance by incorporating porous metal-organic polyhedra (MOPs). These PANI@MOP composites show improved capacitance and stability for energy storage applications.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Polyaniline (PANI) is a conducting polymer with potential for electrochemical energy storage.
- Enhancing PANI's porosity is crucial for improving ion and electron transport during charge-discharge cycles.
- Metal-organic polyhedra (MOPs) offer intrinsic porosity and redox activity.
Purpose of the Study:
- To synthesize PANI-MOP nanocomposites by incorporating redox-active MOPs into PANI.
- To investigate the effect of MOPs on PANI's structure and polymerization process.
- To evaluate the electrochemical capacitive performance of the resulting nanocomposites.
Main Methods:
- Solution-phase oxidative polymerization of aniline with ruthenium-based MOPs (SO3-RuMOP and t-Bu-RuMOP) as additives.
- Dynamic light scattering to monitor polymerization.
- Electron microscopy and infrared spectroscopy for material characterization and MOPs loading quantification.
- Electrochemical measurements in acidic aqueous electrolytes.
Main Results:
- PANI@MOP nanocomposites were successfully synthesized with varying MOP ratios.
- Optimal composites, PANI@SO3-RuMOP (1:0.035) and PANI@t-Bu-RuMOP (1:0.07), achieved specific capacitances of 416 ± 37 F/g and 396 ± 34 F/g, respectively.
- These composites demonstrated superior capacitance, rate capability, and long-term stability compared to pristine PANI.
Conclusions:
- Redox-active MOPs can be effectively used as minor additives during in situ polymerization to create porous PANI.
- The incorporation of MOPs significantly enhances the capacitive performance of PANI.
- These PANI@MOP nanocomposites show promise for advanced electrochemical energy storage devices.
