【摘要】 质子导体固体氧化物燃料电池因其低的工作温度、高的可逆电势和高的燃料利用率等特点正受到研究者的重视。本文整合了文献中活化极化、浓差极化和欧姆极化过电势的显式表达式，提出了柱塞流动时的纯质子导电H-SOFC电化学模型，通过编程进行了计算，并探讨了材料参数、工作温度和阴极侧气体组成对电池特性的影响。研究表明，电解质的欧姆极化和活化极化损失是阳极支撑H-SOFC的主要电势损失；高的电池工作温度，材料的电导率越高，欧姆极化损失越小，电池功率密度越大。在相同温度下，高电导率的电解质材料有低的欧姆极化损失，因而有高的电池效率；阴极侧H₂O浓度增加会减小阴极侧中O₂向阴极电极层扩撒的推动力和造成阴极三相界面生成的H₂O向空气通道扩散的困难，降低电池工作电压和功率密度，应尽可能降低空气通道中H₂O含量。更多还原

【Abstract】 Proton-conducting solid oxide fuel cell, which has the advantages of lower operating temperature, higher reversible potential, and higher fuel utilization than conventional solid oxide fuel cell, nowadays inspires researchers’ interests over abroad and home.In this paper, the formulations of activation, ohmic, and concentration overpotentials in literatures have been reviewed, and a simple electrochemical model for H-SOFC based on the plug flow within gas channels was given.The numerical method was used for calculation of the model.The effects of material parameter, operating temperature, and the composition of gas within air channel have been studied.The calculation results show that ohmic loss and concentration loss are the major losses for the anode-supported H-SOFC.The higher the operating temperature, the bigger the electrical conductivity of electrolyte, which causes a lower ohmic loss, therefore, the cell has higher power density.The material with high electrical conductivity, therefore which has low ohmic loss, at same operating temperature, has a high cell performance.The higher H₂O content in air channel will reduce the driving force of O₂ diffusion to triple phase boundary in cathode and cause more difficult diffusion of H₂O in TPB to the channel, thus decrease the operating voltage and power density.Therefore, it is desirable to reduce the H₂O content in air channel.更多还原