Factors of cathode current-collecting layer affecting cell performance inside solid oxide fuel cell stacks

Factors of cathode current-collecting layer affecting cell performance inside solid oxide fuel cell stacks
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固体氧化物燃料电池堆内阴极集流层影响电池性能的因素

DOI:
10.1016/j.ijhydene.2014.08.116
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发表时间:
2014-10
影响因子:
7.2
通讯作者:
Weiguo Wang
Weiguo Wang
中科院分区:
工程技术2区
文献类型:
--
作者:
Guoliang Wang;Wanbing Guan;Fuxing Miao;Weiguo Wang

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通过对不同(La0.75Sr0.25)0.95MnO3−δ(LSM)阴极集电层(CCCL)的固体氧化物燃料电池(SOFC)电堆的研究,研究了CCCL对电池性能的影响。通过表征2电池堆,当LSM作为CCCL涂覆在阴极侧时,阴极和互连件之间出现较大的真实的接触面积。结果表明,CCCL与其相邻元件(活性阴极和互连线)之间的表面粗糙度匹配(SRM)决定了真实的接触面积。组装并进一步表征使用具有各种表面粗糙度水平的CCCL的6电池堆。结果表明,当CCCL的表面粗糙度与其相邻组件的表面粗糙度匹配较好时,可以获得较高的电堆重复单元的电输出性能,即表面粗糙度匹配(SRM)是阴极集流体影响电堆内部电池性能的因素。因此,SOFC堆内的电池性能可以通过将SRM设计到其相邻部件来调节。
Factors of cathode current-collecting layer (CCCL) affecting cell performance are studied by investigation of solid oxide fuel cell (SOFC) stacks with various (La0.75Sr0.25)0.95MnO3−δ(LSM) as CCCL in-suit. A larger real contact area between cathode and interconnect appears when the LSM is coated on cathode side as CCCL through characterization of a 2-cell stack. The result reveals that the real contact area depends on the surface roughness match (SRM) between CCCL and its neighboring components (active cathode and interconnect). A 6-cell stack using CCCLs with various levels of surface roughness is assembled and characterized further. The results show a higher electrical output performance of the stack repeating unit can be obtained when the surface roughness of the CCCL matches that of its neighboring components better, i.e. the surface roughness match (SRM) is the factor of cathode current collector affecting cell performance inside stack. Accordingly, the cell performance inside SOFC stack can be regulated by designing the SRM to its neighboring components.
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