The surface of Nafion was modified by applying palladium nanoparticles as methanol barrier materials to decrease methanol crossover and improve the performance of fuel cells. The properties of the Pd-modified membrane, in terms of conductivity, methanol permeability, percentage of liquid uptake as well as the performance of its membrane electrode assembly (MEA) in the direct methanol fuel cell, were analyzed and compared with those using bare Nafion. The modified membrane showed considerable improvement on reducing methanol loss without decreasing proton conductivity. The DMFC performance of modified membrane was superior to that of bare Nafion both at a typical fuel state of 2 M and at high concentration of 5 M, implying that the palladium-modified Nafion can be a good alternative approach for DMFC applications.
Bibliographical noteFunding Information:
This work was supported by the core technology development program for fuel cell of Ministry of Science and Technology and Korea Institute of Science and Technology Evaluation and Planning, as well as the Korea Research Foundation Grant funded by the Korea Government (MOEHRD). (KRF-2005-211-C00069).
- Direct methanol fuel cell
- Methanol crossover
- Modified Nafion
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering