ChemElectroChem
ChemElectroChem
3 years ago

Single Cell Fabrication Towards the Realistic Evaluation of a CNT-Strung ZIF-Derived Electrocatalyst as a Cathode Material in Alkaline Fuel Cells and Metal−Air Batteries

Single Cell Fabrication Towards the Realistic Evaluation of a CNT-Strung ZIF-Derived Electrocatalyst as a Cathode Material in Alkaline Fuel Cells and Metal−Air Batteries
Siddheshwar N. Bhange, Harshitha Barike Aiyappa, Sreekumar Kurungot, Vijitha P. Sivasankaran
The development of an electrocatalyst possessing all the vital requisites of an ideal electrode material, such as high porosity, high conductivity, and high intrinsic electrochemical activity, holds a decisive key in determining the activity of the triple-phase boundary in many energy devices like fuel cells and metal−air battery systems. In the present work, highly porous cobalt-based ZIFs are strung along the highly conducive CNT backbone by using a simple one-pot technique at room temperature, which is then utilized to derive a porous, corrosion-resistant, Co nanoparticle-embedded electrocatalyst. Herein, for the first time, the single cell performance of the Co-ZIF-67-derived electrocatalyst has been evaluated by fabricating membrane electrode assemblies of alkaline exchange membrane fuel cell (AEMFC) and zinc–air battery (ZAB) systems. A maximum power density of 296 mW/cm2 (vs. 317 mW/cm2 for 40 wt.% Pt/C) and 60 mW/cm2 (vs. 64 mW/cm2 for 40 wt.% Pt/C) in the single cells of ZAB and AEMFC systems, respectively, establishes the practical proficiency of the homemade electrocatalyst for cathode applications during realistic system-level validations. Keeping it real: A maximum power density of 296 and 60 mW/cm2 in single cell zinc-air battery and anion exchange membrane fuel cell systems, respectively, establishes the CoNC-900 electrocatalyst to have practical proficiency as a cathode electrocatalyst for real-world energy applications.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/celc.201700562

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