期刊
JOURNAL OF POWER SOURCES
卷 423, 期 -, 页码 339-348出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2019.03.054
关键词
Dye-sensitized solar cell; Counter electrode; Catalysts; Tungsten-based bimetal oxide; Bio-based carbon
资金
- NSFC [51672208]
- National Science & Technology Pillar Program [2012BAD47B02]
- Sci-Tech R&D Program of Shaanxi Province [2010K01-120, 2015JM5183]
- Shaanxi Provincial Department of Education [2013JK0927]
- SRF for ROCS, SEM
Tungsten-based bimetal oxides are first used as counter electrode catalysts for dye-sensitized solar cells. In this work, we introduce porous bio-based carbon into tungsten-based bimetal oxide by hydrothermal and annealing methods to improve the electrocatalytic properties of tungsten-based bimetal oxides. A structure transformation from nanorod to nanoflower is observed in cobalt tungsten oxide when porous bio-based carbon is used as the structure-directing agent. Bio-based carbon, which has a porous three-dimensional network structure, serves as an electrocatalytic support material in the tungsten-based bimetal oxide/bio-based carbon composites, reducing the agglomeration and grain size of tungsten-based bimetal oxides and providing rapid electron transfer paths. Tungsten-based bimetal oxide/bio-based carbon composite counter electrodes exhibit enhanced electrocatalytic activity and reduced charge-transfer resistance because of the synergistic effects of catalytic tungsten-based bimetal oxides and conductive bio-based carbon. The dye-sensitized solar cell with nickel tungsten oxide/biobased carbon counter electrode shows a high power conversion efficiency of 7.08%, surpassing that of dyesensitized solar cell with Pt counter electrode (6.46%). This work presents a general strategy for designing and fabricating porous bio-based carbon support inorganic compound materials for energy conversion devices.
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