期刊
JOURNAL OF POWER SOURCES
卷 351, 期 -, 页码 58-66出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2017.03.047
关键词
Molybdenum disulfide; Graphene aerogels; Template; Counter electrode
资金
- National Natural Science Foundation of China [21577099, 51408362]
We developed a 3D MoS2 nanoflakes on graphene aerogel (GA) used as a synthetic template. The resulting MoS2/GA (MG) hybrid possessed 3D nanoscopic layer MoS2 with an abundance of exposed edge sites, in contrast to aggregated MoS2 bulk grown without GA. The MoS2/GA hybrid showed excellent electrical conductivity and catalytic activity as an alternative to platinum counter electrodes in dye sensitized solar cells (DSSCs) compared to conventional bulk MoS2. The resulting MG-based counter electrodes (CEs) exhibited higher power conversion efficiencies (7.86%) than pure MoS2 (2.2%) and surpassed that of Pt (7.2%). The excellent performance of DSSCs can be ascribed to the abundance of catalytic edge sites and the 3D structure of MoS2 nanoflakes for increased electrolyte/reactant diffusion, and the outstanding electrical coupling to the underlying graphene aerogel. Hence, our results demonstrate that the MG materials deserve further investigation for dye-sensitized solar cells. (C) 2017 Elsevier B.V. All rights reserved.
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