Effect of RuO2·xH2O in anode on the performance of direct methanol fuel cells
Effect of RuO2·xH2O in anode on the performance of direct methanol fuel cells
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DOI：
10.1016/j.ijhydene.2010.07.055
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发表时间：
2010-10
影响因子：
7.2
通讯作者：
Shanhui Zhu;Suli Wang;Yan Gao;Luhua Jiang;Hai Sun;Gongquan Sun
中科院分区：
文献类型：
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作者：
Shanhui Zhu;Suli Wang;Yan Gao;Luhua Jiang;Hai Sun;Gongquan Sun
采用伏安法、甲醇溶出法、电化学阻抗法、极化曲线法和计时电位法研究了阳极水合RuO2（RuO2·xH2O）对直接甲醇燃料电池（DMFC）性能的影响。结果表明，与传统结构的DMFC相比，RuO2. xH2O的引入使DMFC的动态响应和准稳态性能得到明显改善。RuO2·xH2O层（ROL）夹在阳极催化剂层和气体扩散层之间的DMFC的准稳态性能优于ROL夹在阳极催化剂层和电解质膜之间的DMFC和RuO2·xH2O均匀分布在阳极催化剂层中的DMFC。采用这种新型结构的直接甲醇燃料电池的最大功率密度比传统结构的直接甲醇燃料电池提高了16%。此外，该RuO2·xH2O引入电池的动态响应在250小时的操作期间比常规电池的动态响应更稳定。
The effect of hydrous RuO2(RuO2·xH2O) in anode on the performance of direct methanol fuel cells (DMFCs) was examined by voltammetry, methanol stripping analysis, electrochemical impedance spectroscopy, polarization measurement and chronopotentiometry. The results showed that, compared with the DMFC with conventional structures, the dynamic response and quasi-steady state performance of the RuO2·xH2O-introduced DMFCs were significantly improved. The DMFC with RuO2·xH2O layer (ROL) sandwiched between anode catalyst layer and gas diffusion layer exhibited better quasi-steady state performance than those either with ROL sandwiched between anode catalyst layer and electrolyte membrane or with RuO2·xH2O uniformly distributed in anode catalyst layer. The maximum power density of the DMFC with this novel structure was 16% higher than the DMFC with the conventional structure. Moreover, the dynamic response of this RuO2·xH2O-introduced cell was more stable during 250-hour of operation when compared with that of the conventional cell.