【摘要】 碳燃料的结构特性是影响直接碳固体氧化物燃料电池（DC-SOFC）输出特性的关键因素。选择生物质和低阶煤热解半焦作为DC-SOFC的燃料，采用红外光谱、拉曼光谱、XRD及氮气等温吸脱附等分析手段，结合半焦的CO₂还原活性及电池输出性能分析，研究了半焦组成和本征结构对DC-SOFC性能的影响机制。结果表明，半焦的灰分含量对其CO₂反应活性有重要影响，半焦脱灰后CO₂反应活性显著降低；脱灰半焦的表观芳香度越低，缺陷芳香环碳与有序芳香环碳的比值越大，半焦的CO₂反应活性越高，则半焦燃料DC-SOFC输出性能越好。利用多元函数拟合方法，建立了脱灰半焦燃料CO₂反应速率与半焦结构参数（芳香度、芳碳缺陷程度）之间的数学关系式，用于判断半焦CO₂反应速率大小及半焦燃料DC-SOFC输出性能的优劣。更多还原

【Abstract】 The structural characteristics of carbon fuel are the key factors affecting the output characteristics of direct carbon solid oxide fuel cells（DC-SOFC）.Biomass and low-rank coal pyrolysis semi-coke were selected as the fuel of DC-SOFC.The influence mechanism of semi-coke composition and intrinsic structure on DC-SOFC performance was studied by infrared spectroscopy,Raman spectroscopy,XRD and nitrogen isothermal adsorption and desorption analysis methods,combined with the analysis of CO₂reduction activity and battery output performance of semi-coke The results show that the ash content of semi-coke has an important effect on its CO₂reactivity,and the CO₂reactivity of semi-coke decreases significantly after deashing.The lower the apparent aromaticity,the greater the ratio of defec‐tive aromatic ring carbon to ordered aromatic ring carbon,the higher the CO₂reactivity of semi-coke,the better the output performance of semi-coke DC-SOFC.By using the multivariate function fitting method,the mathematical rela‐tionship between the CO₂reaction rate of deash semi-coke fuel and the structural parameters of semi-coke （aromatic‐ity,degree of aromatic carbon defect） was established,which was used to judge the CO₂reaction rate of semi-coke and the output performance of semi-coke fuel DC-SOFC.更多还原