ELECTROSPUN NIFE NANOALLOY / CARBON NANOFIBER AS FREE-STANDING CATHODE FOR FLEXIBLE ZN-AIR BATTERIES

• Main Author: Akmalia, Rachendra
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/80129
• Institution: Institut Teknologi Bandung

The flexible zinc-air battery (ZAB) emerges as a promising option for energy storage in upcoming wearable technologies. To enhance its viability, oxygen evolution reaction (OER) catalysts, made from non-noble transition metal alloys, are crucial. However, ensuring high OER activity while preventing self-aggregation of alloy nanoparticles poses a challenge. Anchoring these metal alloys to carbon supports could prevent such aggregation. A blend of polyacrylonitrile (PAN), polymethyl methacrylate (PMMA), pyrrole, and Ni/Fe salts was used to create well-dispersed NiFe nanoparticles within nitrogen-doped mesoporous carbon nanofibers (NiFe-N@CNF) via electrospinning and subsequent carbonization. This NiFe-N@CNF demonstrated superior OER activity with a 351 mV overpotential and remarkable stability over 14 hours of testing. The resulting ZAB, incorporating NiFe-N@CNF, showcased high power density (179 mW cm-2) and stability over 500 hours. With its flexible properties, free-standing NiFe-N@CNF is also used as all-solid-state ZAB cathode for flexible-wearable technologies.