| 1. | At present , methanol crossover from the anode to the cathode has appeared to be a major limitation for dmfc development
甲醇由电池阳极向阴极的渗漏已成为阻碍dmfc发展的一大障碍。 |
| 2. | Effects of variable methanol inlet concentration and cathode pressure on fuel cell performance and methanol crossover are analyzed
分析了不同进料浓度和阴极压力对电池性能和甲醇窜流的影响。 |
| 3. | Model indicates that , at low current density and high methanol concentration , the methanol crossover poses a serious problem for a dmfc
模型计算显示，在低电流密度和高浓度甲醇进料情况下，甲醇渗透将成为dmfc的一个严重问题。 |
| 4. | The poor kinetics of anode reaction and methanol crossover in electrolyte are the two key issues hindering dmfc commercial application
然而甲醇在阳极上的氧化速率缓慢及甲醇渗透等问题是用于大功率、高容量电池上的两大技术难题。 |
| 5. | The goal of this study is to optimize meas through investigation of factors affecting their performance , with an emphasis on elucidating the effects of methanol crossover
本研究旨在通过实验和数学模型，研究膜电极的优化方法，解释甲醇穿透对电池性能的影响。 |
| 6. | Simulation results show that cathode over - potential under low current density is considerably increased because of methanol crossover , but its effect becomes much lower under high current density
模型显示在低放电电流密度下，甲醇穿透显著地增加了电池阴极过电位，降低了电池电压；但在高电流密度下，甲醇穿透对电池性能的影响不显著。 |
| 7. | At first , a two - dimensional across - the - channel mathematical model for simulation of a direct methanol fuel cell is described . the model accounts simultaneously for electrochemical kinetics , hydrodynamics , and multicomponent transport , and fully accounts for the mixed potential effects of methanol oxidation at the cathode as a result of methanol crossover caused by convection , diffusion and electro - osmosis
首先描述了一个用于模拟直接甲醇燃料电池特性的垂直于流道的二维数学模型，模型考虑了多组分传递、水动力学和电化学动力学，并且考虑了甲醇窜流在电池阴极产生的混合电位的影响。 |
| 8. | A mathematical model for the anode of a direct methanol fuel cell ( dmfc ) considering the mass transport in the whole anode compartment and the proton exchange membrane ( pem ) , together with the kinetic and ohmic resistance effects through the catalyst layer is developed . the influences of key parameters on methanol crossover and anode performance are investigated
对于dmfc的阳极，本文描述了甲醇和水在阳极及质子交换膜（ pem ）中的传递过程、反应动力学和欧姆阻抗效应，建立阳极和pem的数学模型，并探讨对甲醇扩散和阳极性能影响的主要因素。 |
| 9. | Special attention is paid to the consequences of methanol crossover in cathode reaction and cathode over - potential . good agreement is found between simulations and experiments in regard to the v - i character of dmfcs . based on the theory of parallel electrode reaction , it becomes possible to obtain quantitatively the value of over - potential caused by methanol crossover , which is either implicit or not included in the overall cathode over - potential in previous models
该模型涵盖了dmfc中的主要物理化学过程，包括：甲醇水溶液在膜电极内的扩散、对流和电迁移；质子在阳极催化剂层和阴极催化剂层内的传递；氧气、水蒸汽在阴极的扩散；阳极催化剂层内的甲醇氧化反应动力学；以及阴极催化剂层内的氧还原和甲醇氧化反应动力学。 |
