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m-PH-SiO_2/Nafion复合膜的质子导电性

Proton conductivity of m-PH-SiO_2/Nafion composite membranes
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摘要 为提高Nation膜在中温段的质子导电性，用溶胶-凝胶法制备比表面积为386m2／g掺磷中孔SiO2（m-PH—SiO2），并与Nafion的N，N二甲基甲酰胺溶液混合，重铸法制备不同m-PH-SiO2含量的m-PH-SiO2／Nafion复合膜。用N2-吸附脱附和TEM表征m-PH—SiO2的介孔结构，SEM观察复合膜的表面．以交流阻抗技术和隔膜扩散法考察m-PH-SiO2掺入量对复合膜的质子传导率和甲醇渗透性能的影响．结果显示，与相同条件制备的纯Nafion重铸膜相比，30-200℃范围内，两种复合膜的电导率都比Nation重铸膜的有所提高，且m—PH—SiO2质量分数为7％时复合膜的质子电导达到最大．复合膜的甲醇渗透率随m-PH—SiO2含量增大也略有增加． A mesoporous SiO2with P2O5 hybrid in the pore walls(m-PH-SiO2) with higher surface 386 m2/ g was synthesized by sol-gel method.The m-PH-SiO2/ Nafion composite membranes were prepared by recasting method with m-PH-SiO2 and Nafion dimethyl formamide solution.The proton conductivities of the membranes at 30~200 ℃ were measured by AC impedance technique.The results show that the conductivities of m-PH-SiO2/ Nafion membranes are higher than that of Nafion recasting membrane prepared under the same condition.The effect of filler content on proton conductivity and methanol permeability were studied.The results reveale that the optimal quantity of filled m-PH-SiO2 is 7%.However,the permeability of methanol increases appreciably with the increase in filled m-PH-SiO2.
作者 邹智毅 魏小兰 付珍 李丽坤 丁静
机构地区 华南理工大学化学与化工学院 中山大学工学院
出处 《膜科学与技术》 CAS CSCD 北大核心 2011年第5期25-28,57,共4页 Membrane Science and Technology
基金 国家自然科学基金-广东联合基金项目(U1034005) 华南理工大学学生研究计划(SRP)
关键词 m—PH—SiO2/Nafion 复合膜 质子导电性 m-PH-SiO2/Nafion composite membrane proton conductivity
分类号 TM911.4 [电气工程—电力电子与电力传动]
  • 相关文献

参考文献11

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二级参考文献18

  • 1Li Q, He R, Jensen J O, et al. Approaches and recent development of polymer electrolyte membranes for fuel cells operating above 100℃ [ J]. Chem Mater 2003, 15(26) :4896 -4915.
  • 2Li Q, He R, Gao J, et al. The CO poisoning effect in polymer electrolyte membrane fuel cells operational at temperatures up to 200℃ [ J ]. Electrochem Soc. , 2003,150 : A1599 - 1605.
  • 3Slade R C Ta, Hardwicka A, Dickens P G. Investigation of H^+ motion in NAFION film by pulsed ^1 H NMR and A. C. conductivity measurements[J]. Solid State Ionics, 1983, 9/10(Part 2) :1093 - 1098.
  • 4Kreuer K D. On the development of proton conducting materials for technological applications[J]. Solid State lonies, 1997, 97(1 -4):1 -15.
  • 5Zawodzisnki T A, Neeman M, Sillerud L, et al. Determination of water diffusion coefficients in perfluorosulfonate ionomeric membranes [ J ]. J Phys Chem, 1991,95 ( 15 ) :6040 - 6044.
  • 6Baldauf M, Preidel W. Status of the development of a direct methanol fuel cell[J]. J Power Sources, 1999, 84(2) :161 -166.
  • 7Antonucci P L, Arico A S, Creti P, et al. Investigation of a direct methanol fuel cell based on a composite Nafion- silica electrolyte for high temperature operation [ J ]. Solid State Ionics, 1999, 125 ( 1 - 4 ) : 431 - 437.
  • 8Tominaga Y, Hong I C, Asai S, et al. Proton conduction in Nation composite membranes filled with mesoporous silica [ J ]. J Power Sources, 2007, 171 (2) :530 -534.
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膜科学与技术
2011年 第5期

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