Citation: SHENG Lei, LI Tingyu, GUO Lifang, LI Gang, ZHANG Wendong. Application of Functionalized Multi-walled Carbon Nanotubes Filled Gel Electrolyte in Dye-Sensitized Solar Cells[J]. Chinese Journal of Applied Chemistry, ;2019, 36(7): 815-822. doi: 10.11944/j.issn.1000-0518.2019.07.180410 shu

Application of Functionalized Multi-walled Carbon Nanotubes Filled Gel Electrolyte in Dye-Sensitized Solar Cells

MicroNano System Research Center & Key Laboratory of Advanced Transducers and Intelligent Control System(Ministry of Education), College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China

Corresponding author: LI Gang, ligang02@tyut.edu.cn
Received Date: 25 December 2018
Revised Date: 13 March 2019
Accepted Date: 3 April 2019

Fund Project: the National Natural Science Foundation of China 61674113Supported by the National Natural Science Foundation of China(No.61674113, No.51622507, No.61471255), the Natural Science Foundation of Shanxi Province, China(No.2016011040), and the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province, China(No.2016138)the Natural Science Foundation of Shanxi Province, China 2016011040the National Natural Science Foundation of China 51622507the National Natural Science Foundation of China 61471255the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province, China 2016138

Figures(5)

Gel electrolyte based on pure polyvinylidene fluoride-six fluoropropene copolymer(PVDF-HFP) often suffers from low ionic conductivity, which hinders its application in dye-sensitized solar cells(DSSCs). However, the ionic conductivity of gel electrolyte and the conversion efficiency of the DSSCs can be enhanced by nanofillers. In this paper, we employed functionalized multi-walled carbon nanotube(f-MWCNT) as the nanofiller in the gel electrolyte based on PVDF-HFP. We studied its effect on ionic conductivity and ionic diffusion of electrolytes via changing the mass fraction of f-MWCNT, and investigated its improvement on the conversion efficiency and long-term stability of DSSCs. It was found that the PVDF-HFP gel electrolyte with 0.5% f-MWCNT significantly increased the ionic conductivity and ionic diffusion coefficient of the electrolyte. Moreover, the optimal conversion efficiency of the DSSCs with gel electrolyte reaches to 5.28%, which is 31.7% higher than that of the DSSCs with unfilled gel electrolyte(4.01%). After 42 days, the DSSCs still maintained 86.5% of the original conversion efficiency. The experiment confirms the great potential of f-MWCNT as the nanofiller, providing a reference for the study to improve the performance of the gel electrolyte DSSCs by nanofillers.
- functionalized multi-walled carbon nanotube,
- gel electrolyte,
- nanofiller,
- dye-sensitized solar cells
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