Back to Search
Start Over
Synthesis of lignite-based Ni/C composite with low-medium temperature pyrolysis method as an efficient Pt-free counter electrode for dye-sensitized solar cells.
- Source :
- Journal of Applied Electrochemistry; Apr2023, Vol. 53 Issue 4, p833-846, 14p
- Publication Year :
- 2023
-
Abstract
- In order to obtain inexpensive Pt-free counter electrode materials for dye-sensitized solar cells and expand the application fields of low-rank coal, lignite-based Ni/C composite was prepared by low-medium temperature pyrolysis method using Huolinhe lignite as raw materials. The structure and chemical components of as-synthesized lignite-based Ni/C composite was characterized by XRD, FT-IR, TG, Raman, SEM, TEM, and XPS, and the electrocatalytic activity of lignite-based Ni/C composite counter electrode was investigated by cyclic voltammetric curve, electrochemical impedance spectrum, and Tafel polarization curve. It is found that the electrocatalytic activity of the lignite was improved after low-medium temperature pyrolysis and composited with Ni species to form lignite-based Ni/C composite, which helps to catalyze the reduction of electrolyte and thus improve the photoelectric conversion efficiency of the solar cells. The photoelectric conversion efficiency (η) of the dye-sensitized solar cells based on the lignite-based Ni/C composite counter electrode was 3.42% (J<subscript>sc</subscript> = 11.49 mA cm<superscript>−2</superscript>, V<subscript>oc</subscript> = 0.75 V, FF = 0.40) significantly higher than that of the lignite counter electrode (η = 0.20%, J<subscript>sc</subscript> = 3.16 mA cm<superscript>−2</superscript>, V<subscript>oc</subscript> = 0.72 V, FF = 0.09). This indicates that low-medium temperature pyrolysis and composition with Ni are an effective method to improve the photovoltaic performance of lignite-based counter electrode materials. The lignite-based Ni/C composite was synthesized and applied in counter electrode for DSSCs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0021891X
- Volume :
- 53
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Journal of Applied Electrochemistry
- Publication Type :
- Academic Journal
- Accession number :
- 162206786
- Full Text :
- https://doi.org/10.1007/s10800-022-01822-7