Polymer electrolyte membranes containing titanate nanotubes for elevated temperature fuel cells under low relative humidity
Polymer electrolyte membranes containing titanate nanotubes for elevated temperature fuel cells under low relative humidity
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用于低相对湿度下高温燃料电池的含钛酸盐纳米管的聚合物电解质膜
DOI：
10.1016/j.jpowsour.2011.05.082
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发表时间：
2011-10-15
影响因子：
9.2
通讯作者：
Pan, Mu
中科院分区：
文献类型：
--
作者：
Li, Qiong;Xiao, Chuan;Pan, Mu
采用浇铸法制备了Nafion-钛酸盐纳米管复合膜，并在低相对湿度条件下对其作为聚合物电解质膜燃料电池的电解液进行了研究。复合膜的玻璃化转变温度和干态分解温度均高于纯膜。当纳米管的浓度超过5wt.%时，膜中出现了裂纹。在100℃和50%相对湿度下，掺杂的钛酸盐纳米管的质量分数为5wt.%时，其质子电导率最大。用固体核磁共振波谱定性表征了不同温度下膜内水的状态。在65℃和90℃的相对湿度为50%的条件下，由含5wt%钛酸根纳米管的复合膜组装的电池在0.8V时的功率密度分别比普通Nation电池高13%和35%。(C)2011爱思唯尔B.V.保留所有权利。
Nafion-titanate nanotubes composite membranes prepared through casting process have been investigated as electrolytes for polymer electrolyte membrane fuel cell applications under low relative humidity. The glass transition temperature and the decomposition temperature of composite membrane at dry state are higher than those of pristine Nation membrane. Cracks have been observed in the membrane at the concentration of nanotubes above 5 wt.%. The maximum proton conductivity at 100 degrees C and 50% relative humidity is observed with the concentration of doped titanate nanotubes of 5 wt.%. Solid nuclear magnetic resonance spectrum is applied to qualitatively characterize the status of water inside the membrane at different temperatures. The power densities at 0.8 V for cell assembled from composite membrane containing 5 wt.% of titanate nanotubes are about 13% and 35% higher than that for plain Nation cells under 50% relative humidity at 65 degrees C and 90 degrees C. respectively. (C) 2011 Elsevier B.V. All rights reserved.