CAJ | 학술논문

能源危机和环境污染是全世界在可持续发展道路中所面临的难题.固体氧化物燃料电池(SOFC)具有高能量转化效率和低污染排放,被认为是未来能源经济的基石.其中,以质子导体作为电解质的固体氧化物燃料电池(H-SOFC)由于具有高燃料利用率、高理论电动势、高离子迁移数以及低传导活化能,因而备受关注.然而,与氧离子导体固体氧化物燃料电池(O-SOFC)相比,H-SOFC的材料选择和理论体系还处于初级阶段,尤其是H-SOFC的阴极.在H-SOFC中,氢气在阳极被氧化,形成质子,通过电解质迁移到阴极,而后与氧进行电极反应生成水,其阴极的电极过程比O-SOFC更为复杂.寻找高性能的阴极材料和探索H-SOFC中的阴极反应机理,对于H-SOFC的发展具有重要的意义.围绕质子导体阴极材料的发展进行深入调研,着重阐述和总结了不同传导类型的阴极材料的电化学行为及其反应模型,为H-SOFC阴极材料的发展和应用提供了一种思路.
능원위궤화배경오염시전세계재가지속발전도로중소면림적난제.고체양화물연료전지(SOFC)구유고능량전화효솔화저오염배방,피인위시미래능원경제적기석.기중,이질자도체작위전해질적고체양화물연료전지(H-SOFC)유우구유고연료이용솔、고이론전동세、고리자천이수이급저전도활화능,인이비수관주.연이,여양리자도체고체양화물연료전지(O-SOFC)상비,H-SOFC적재료선택화이론체계환처우초급계단,우기시H-SOFC적음겁.재H-SOFC중,경기재양겁피양화,형성질자,통과전해질천이도음겁,이후여양진행전겁반응생성수,기음겁적전겁과정비O-SOFC경위복잡.심조고성능적음겁재료화탐색H-SOFC중적음겁반응궤리,대우H-SOFC적발전구유중요적의의.위요질자도체음겁재료적발전진행심입조연,착중천술화총결료불동전도류형적음겁재료적전화학행위급기반응모형,위H-SOFC음겁재료적발전화응용제공료일충사로.
Energy crisis and environmental pollutions are the problems which the whole world is now fac-ing for the sustainable development. Solid oxide fuel cells(SOFCs),which have been regarded as keystone for the future energy economy,have received considerable attention for their high energy conversion efficiency and low impact to environment as a mean of generating electricity. Proton conducting solid oxide fuel cells(H-SOFCs) have attracted much attention for their unique characters,such as great efficiency in fuel utilization,high electro-motive force,high ionic transferring numbers and low activation energies for proton conduction. However, compared with oxygen-ion conducting SOFCs(O-SOFCs),the materials and theories on H-SOFC are just inchoate, especially for cathodes of H-SOFC. In H-SOFC,hydrogen is oxidized at the anode to form protons,which migrate through the electrolyte to the cathode,and undergo a half-cell reaction with oxygen to produce water, which makes the cathode reactions more complex compared with those of O-SOFC. Such distinguished characteristic of cathode reactions calls for intensive consideration on reaction mechanism and might lead to some special demands on the cathode materials. This review is focused on the hisrory of cathode materials for H-SOFC. The elec-trochemical performancesandreactionmodelsofdifferentconductionmechanismcathodematerialsaresummarized, providing some useful means and ways for the development and application of cathode materials for H-SOFC.