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고온/저가습 PEMFC 운전을 위한 Nafion^Ⓡ/ZrO_2-TiO_2 복합 전해질 막의 특성 연구A Characterization Study on Nafion^Ⓡ/ZrO_2-TiO_2 Composite Membranes for PEMFC Operation at High Temperature and Low Humidity
- Other Titles
- A Characterization Study on Nafion^Ⓡ/ZrO_2-TiO_2 Composite Membranes for PEMFC Operation at High Temperature and Low Humidity
- Issue Date
- 2011
- Publisher
- 한국수소및신에너지학회
- Keywords
- PEMFC; ZrO_2-TiO_2 binary oxides; Sol-gel method; Composite membrane; Water uptake; IEC; 고분자 전해질 연료전지; ZrO_2-TiO_2 복합산화물; 졸-젤법; 복합막; 물함유율; 이온교환능
- Citation
- 한국수소및신에너지학회논문집, v.22, no.1, pp.60 - 68
- Indexed
- KCI
- Journal Title
- 한국수소및신에너지학회논문집
- Volume
- 22
- Number
- 1
- Start Page
- 60
- End Page
- 68
- ISSN
- 1738-7264
- Abstract
- ZrO_2-TiO_2 binary oxides with various Zr:Ti molar ratios were prepared by sol-gel method and Nafion^Ⓡ/ZrO_2-TiO_2 composite membranes were fabricated for proton exchange membrane fuel cells (PEMFCs) at high temperature and low humidity. Water uptake, Ion exchange capacity (IEC), and proton conductivity of Nafion^Ⓡ/ZrO_2-TiO_2 composite membranes were characterized and these composite membranes were tested in a single cell at 120℃ with various relative humidity (R.H.) conditions. The obtained results were compared with the unmodified membranes (Nafion^Ⓡ 112 and Recast Nafion^Ⓡ). A Nafion^Ⓡ/ZrO_2-TiO_2 composite membrane with 1:3 of Zr:Ti molar ratio showed the highest performance. The performance showed 500 mW/cm^2 (0.499V)at 120℃, 50% R. H., and 2 atm.
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