Preparation of Pt/zeolite-Nafion composite membranes for self-humidifying polymer electrolyte fuel cells

Dong Hoon Son, Raj Kishore Sharma, Yong Gun Shul, Hansung Kim

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

A novel Pt/zeolite-Nafion (PZN) polymer electrolyte composite membrane is fabricated for self-humidifying polymer electrolyte membrane fuel cells (PEMFCs). A uniform dispersion of Pt nanoparticles with an average size of 3 nm is achieved by ion-exchange of the zeolite HY. The Pt nanoparticles embedded in the membrane provide the catalytic sites for water generation, whereas the zeolite HY-supported Pt particles absorbs water and make it available for humidification during cell operation at elevated temperature. Compared with the performance of ordinary membranes, the performance of cells with PZN membranes is improved significantly under dry conditions. With dry H2 and O2 at 50 °C, the PZN membrane with 0.65 wt.% of Pt/zeolite (0.03 mg Pt cm-2) gives 75% of the performance obtained at 0.6 V with the humidified reactants at 75 °C. Impedance analysis reveales that an increase in charge-transfer resistance is mainly responsible for the cell performance loss operated with dry gases.

Original languageEnglish
Pages (from-to)733-738
Number of pages6
JournalJournal of Power Sources
Volume165
Issue number2
DOIs
Publication statusPublished - 2007 Mar 20

Fingerprint

Zeolites
Composite membranes
Electrolytes
fuel cells
Fuel cells
Polymers
electrolytes
membranes
Membranes
preparation
composite materials
polymers
Nanoparticles
Proton exchange membrane fuel cells (PEMFC)
cells
Charge transfer
Water
Ion exchange
nanoparticles
water

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

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title = "Preparation of Pt/zeolite-Nafion composite membranes for self-humidifying polymer electrolyte fuel cells",
abstract = "A novel Pt/zeolite-Nafion (PZN) polymer electrolyte composite membrane is fabricated for self-humidifying polymer electrolyte membrane fuel cells (PEMFCs). A uniform dispersion of Pt nanoparticles with an average size of 3 nm is achieved by ion-exchange of the zeolite HY. The Pt nanoparticles embedded in the membrane provide the catalytic sites for water generation, whereas the zeolite HY-supported Pt particles absorbs water and make it available for humidification during cell operation at elevated temperature. Compared with the performance of ordinary membranes, the performance of cells with PZN membranes is improved significantly under dry conditions. With dry H2 and O2 at 50 °C, the PZN membrane with 0.65 wt.{\%} of Pt/zeolite (0.03 mg Pt cm-2) gives 75{\%} of the performance obtained at 0.6 V with the humidified reactants at 75 °C. Impedance analysis reveales that an increase in charge-transfer resistance is mainly responsible for the cell performance loss operated with dry gases.",
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Preparation of Pt/zeolite-Nafion composite membranes for self-humidifying polymer electrolyte fuel cells. / Son, Dong Hoon; Sharma, Raj Kishore; Shul, Yong Gun; Kim, Hansung.

In: Journal of Power Sources, Vol. 165, No. 2, 20.03.2007, p. 733-738.

Research output: Contribution to journalArticle

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AB - A novel Pt/zeolite-Nafion (PZN) polymer electrolyte composite membrane is fabricated for self-humidifying polymer electrolyte membrane fuel cells (PEMFCs). A uniform dispersion of Pt nanoparticles with an average size of 3 nm is achieved by ion-exchange of the zeolite HY. The Pt nanoparticles embedded in the membrane provide the catalytic sites for water generation, whereas the zeolite HY-supported Pt particles absorbs water and make it available for humidification during cell operation at elevated temperature. Compared with the performance of ordinary membranes, the performance of cells with PZN membranes is improved significantly under dry conditions. With dry H2 and O2 at 50 °C, the PZN membrane with 0.65 wt.% of Pt/zeolite (0.03 mg Pt cm-2) gives 75% of the performance obtained at 0.6 V with the humidified reactants at 75 °C. Impedance analysis reveales that an increase in charge-transfer resistance is mainly responsible for the cell performance loss operated with dry gases.

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