𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Comparison between Nafion® and a Nafion® Zirconium Phosphate Nano-Composite in Fuel Cell Applications

✍ Scribed by F. Bauer; M. Willert-Porada

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
509 KB
Volume
6
Category
Article
ISSN
1615-6846

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A comparative investigation of the electrical, mechanical, and chemical behaviour of zirconium phosphate‐Nafion® composite membranes and Nafion® by means of ex‐situ measurements, as well as with fuel cell operation, reveals a slight reduction of ionic conductivity, a significant improvement of mechanical stability, and increased water retention for the composite materials. The overall efficiency at 130 °C is increased during direct methanol fuel cell (DMFC) operation because the reduction in the ionic conductivity is overcompensated for by the decrease in methanol crossover. With H~2~ as the fuel, the slight reduction in overall efficiency corresponds to the decrease in ionic conductivity. The dimensional stability of the membrane and the membrane electrode assembly (MEA) is significantly improved for operating temperatures above 100 °C. A model for the microstructure‐property relation for PFSA‐Zr(HPO~4~)~2~ · n H~2~O composite membranes is presented, based on the experimental results from membranes with varying filler contents and distributions, obtained through different synthesis routes. It is aimed at the improvement of water distribution in the membrane upon fuel cell operation.

📜 SIMILAR VOLUMES

A comparison of physical properties and
A comparison of physical properties and fuel cell performance of Nafion and zirconium phosphate/Nafion composite membranes
✍ Chris Yang; S. Srinivasan; A.B. Bocarsly; S. Tulyani; J.B. Benziger 📂 Article 📅 2004 🏛 Elsevier Science 🌐 English ⚖ 467 KB

The physiochemical properties of Nafion 115 and a composite Nafion 115/zirconium phosphate (∼25 wt.%) membranes are compared. The composite membrane takes up more water than Nafion at the same water activity. However, the proton conductivity of the composite membrane is slightly less than that for N

Co-assembly of a Nafion–Mesoporous Zirco
Co-assembly of a Nafion–Mesoporous Zirconium Phosphate Composite Membrane for PEM Fuel Cells
✍ A. K. Sahu; S. Pitchumani; P. Sridhar; A. K. Shukla 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 532 KB

## Abstract Synthesis of mesoporous zirconium phosphate (MZP) by co‐assembly of a tri‐block copolymer, namely pluronic‐F127, as a structure‐directing agent, and a mixture of zirconium butoxide and phosphorous trichloride as inorganic precursors is reported. MZP with a specific surface area of 84 m^