J Shanghai Jiaotong Univ Sci

Journal of shanghai Jiaotong University (Science) ›› 2012, Vol. 17 ›› Issue (5): 579-585.doi: 10.1007/s12204-012-1328-3

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Modified Nafion Polymer Electrolyte Membranes by γ-Ray Irradiation Used in Direct Methanol Fuel Cells

Modified Nafion Polymer Electrolyte Membranes by γ-Ray Irradiation Used in Direct Methanol Fuel Cells

SUO Chun-guang1,2* (索春光), ZHANG Wen-bin3 (张文斌)， WANG Hua4 (王华), YANG Feng-jie5 (杨凤杰)   

  1. (1. Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China; 2. Metallurgical Engineering Postdoctoral Flow Station, Kunming University of Science and Technology, Kunming 650093, China; 3. Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China; 4. Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; 5. Department of Applied Engineering, Zhejiang Economic & Trade Polyetchnic, Hangzhou 310018, China)
  2. (1. Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China; 2. Metallurgical Engineering Postdoctoral Flow Station, Kunming University of Science and Technology, Kunming 650093, China; 3. Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China; 4. Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; 5. Department of Applied Engineering, Zhejiang Economic & Trade Polyetchnic, Hangzhou 310018, China)
  • Online:2012-10-30 Published:2012-11-16
  • Contact: SUO Chun-guang1,2* (索春光) E-mail:suochunguang@126.com

Abstract: Modification of the commercial polymer electrolyte membrane (PEM) Nafion 117 by γ-ray irradiation to produce an improved proton exchange membrane for direct methanol fuel cells (DMFCs) was described. The Nafion 117 membrane was exposed under γ-ray irradiation circumstance with the irradiation doses from 103 to 105 Gy. Subsequently the properties of the membrane itself, in terms of swelling ratio, water uptake rate, proton conductivity and methanol permeability, together with the performance of its membrane electrode assembly (MEA) in DMFC were analyzed and contrasted with the untreated material. When the Nafion 117 membrane was exposed under γ-ray irradiation circumstance, the degradation and crosslinking reactions occurred at the same time. Specific scopes of the γ-ray irradiation dose may cause the membrane crosslinking, thus reduce the membrane swelling ratio and decrease the methanol crossover. By reducing the membrane swelling ratio and methanol permeation, the single DMFC with the modified Nafion 117 membrane produced reasonable power density performance as high as 32W/m2 under 2mol/L methanol solution at room temperature.

Key words: Nafion 117 membrane| γ-ray irradiation| modification| direct methanol fuel cell (DMFC)

摘要： Modification of the commercial polymer electrolyte membrane (PEM) Nafion 117 by γ-ray irradiation to produce an improved proton exchange membrane for direct methanol fuel cells (DMFCs) was described. The Nafion 117 membrane was exposed under γ-ray irradiation circumstance with the irradiation doses from 103 to 105 Gy. Subsequently the properties of the membrane itself, in terms of swelling ratio, water uptake rate, proton conductivity and methanol permeability, together with the performance of its membrane electrode assembly (MEA) in DMFC were analyzed and contrasted with the untreated material. When the Nafion 117 membrane was exposed under γ-ray irradiation circumstance, the degradation and crosslinking reactions occurred at the same time. Specific scopes of the γ-ray irradiation dose may cause the membrane crosslinking, thus reduce the membrane swelling ratio and decrease the methanol crossover. By reducing the membrane swelling ratio and methanol permeation, the single DMFC with the modified Nafion 117 membrane produced reasonable power density performance as high as 32W/m2 under 2mol/L methanol solution at room temperature.

关键词: Nafion 117 membrane| γ-ray irradiation| modification| direct methanol fuel cell (DMFC)

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