Phosphazene-Based Porous Polymer as Electrode Material for Electrochemical Applications.

Area of Science:

• Materials Science
• Electrochemistry
• Polymer Chemistry

Background:

• Porous materials are crucial for energy storage and catalysis.
• Developing novel precursors for heteroatom-doped carbons is an active research area.
• Phosphazene polymers offer unique structural and chemical properties.

Purpose of the Study:

• To synthesize porous highly cross-linked polymer (PIP) from hexachlorocyclotriphosphazene and piperazine.
• To investigate the properties of the carbonized PIP (PIP-C) product.
• To evaluate the potential of PIP-C as an electrode material for supercapacitors and as a metal-free electrocatalyst.

Main Methods:

• Polycondensation reaction to synthesize PIP.
• Carbonization of PIP to obtain PIP-C.
• Surface area analysis (BET).
• Electrochemical characterization for specific capacitance and oxygen electroreduction activity.

Main Results:

• PIP synthesized with a surface area of 76.9 m²/g and mesoporous structure.
• Carbonized PIP (PIP-C) exhibited a significantly increased surface area of 177 m²/g.
• PIP-C demonstrated high specific capacitance (155.6 F/g) and catalytic activity (15.9 A/g) for oxygen electroreduction due to nitrogen and phosphorus heteroatoms.

Conclusions:

• Porous phosphazene polymers are viable precursors for producing heteroatom-doped carbon materials.
• PIP-C shows promising performance for electrochemical applications, including supercapacitors and fuel cells.
• This study highlights a novel route to advanced carbon materials for electrochemical devices.