Design and characterization of frog egg shaped CoFe2O4@C core-shell composite as a novel multi-functional counter electrode for low-cost energy devices

Liu, Shuang'an ¹Qi, Wankun ¹Cao, Ying ¹Liang, Chengyang ¹Geng, Shitong ¹Guo, Haipeng ²Liu, Ying ³Luo, Yanhong ⁴Zhang, Wenming ¹Li, Ling¹

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作者信息

1. Hebei Univ
2. Fengfan Co Ltd
3. State Key Lab Photovolta Mat & Technol
4. Chinese Acad Sci
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Abstract

The electrical conductivity and catalytic activity of the electrode materials greatly affect the photoelectric conversion performance of DSSCs. However, the commonly used Pt electrodes no longer meet the needs of long-term development at present. Herein, based on the Kirkendall effect, CoFe2O4 @C nanoparticles with core-shell structure are successfully prepared using the treatment of quasi-sol-gel method. The size of CoFe2O4 @C nanoparticles is homogenized without agglomeration through adjusting the ratio of metal salt in the precursor. The composite exhibits excellent counter electrode properties in DSSCs, which attributes to the large specific surface area and superior electro-catalytic activity. With the optimized film thickness (12 mu m) of CoFe2O4 @C, an excellent photoelectric conversion efficiency of 7.80% is finally achieved, significantly higher than that of pure carbon (PC) electrode (6.36%) and even Pt counter electrode (7.05%) under the same conditions. The composite can additionally catalyze the recycling of I-/I3- redox couple steadily, providing more possibilities for the study of Pt-free materials about DSSCs counter electrode. (c) 2022 Published by Elsevier B.V.

Key words

Dye-sensitized solar cell/Counter electrode/Transition metal oxide/Composite/SENSITIZED SOLAR-CELLS/HIGHLY EFFICIENT/CARBON/NANOPARTICLES/ENHANCEMENT/FABRICATION/CATALYST/OXIDES

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出版年

2022

Journal of Alloys and Compounds

EISCI

ISSN：0925-8388

被引量5

参考文献量62

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