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Polyvinyl Acetal-based Quasi-Solid-Sate Electrolytes and Their Application in Dye-sensitized Solar Cells
Shi, Ji-fu1; Huang, Qi-zhang1,2; Shen, Cheng-jia1,3; Zhu, Yan-qing1,2; Xu, Gang1
2016-12-20
发表期刊ACTA POLYMERICA SINICA
期号12页码:1735-1742
摘要Polyvinyl formal (PVF) and polyvinyl butyral (PVB) as polymer frameworks are used to prepare quasi. solid. state electrolytes loaded with I-2 and LiI, which are further applied in dye. sensitized solar cells (DSCs) to improve the stability of DSCs. FTIR spectra, thermodynamic and electrochemical methods are used to characterize the functional group of the polymers and the conductivity of the quasi. solid. state electrolytes. These results show that the oxygen atoms of C = O and O-C-O in the polymers (PVF and PVB) can interact with Li+ of LiI by coordination effect, promoting the ionization of LiI and facilitating the charge transport. Through the comparison between PVF and PVB, it can be also found that the propyl side chain of PVB has positive influence on the thermodynamic and electrochemical performance, where the DSCs with PVB exhibit better photovoltaic performance. By optimizing the composition of electrolytes, the ionic conductivity of PVF and PVB. based quasi. solid. state electrolytes can reach the maximum ionic conductivity of 2.5 mS . cm(-1) (PVF) and 4. 2 mS . cm(-1) (PVB), with the concentration of LiI at 0. 7 mol . L-1. Under this condition, the diffusion. limiting current density of PVF and PVB. based quasi. solid. state electrolytes can achieve 10. 05 mA . cm(-2)(triiodide ionic diffusion constant = 1. 84 x 10(-6) cm(2) . s(-1)) and 17. 89 mA . cm(-2) (triiodide ionic diffusion constant = 3. 23 x 10(-6) cm(2) . s(-1)), respectively. Impedance plots of the quasi. solid. state DSCs reflect that the PVB. based DSCs have a higher charge. transport resistance (R-ct = 118. 9 Omega) than that of PVF. based DSCs (R-ct = 49. 57 Omega) and effectively suppress the dark reaction due to the steric hindrance of the propyl side chain. Eventually, the dye. sensitized solar cells based on these two electrolytes attain satisfactory energy conversion efficiency of 4. 18% (PVF) and 6. 06% (PVB) and excellent long. term stability, which renders only a tiny decline of the efficiency of DSCs and maintain the efficiency of DSCs at above 90% of the original
文章类型Article
关键词Polyvinyl Formal Polyvinyl Butyral Electrolyte Conductivity Dye-sensitized Solar Cell
WOS标题词Science & Technology ; Physical Sciences
DOI10.11777/j.issn1000-3304.2016.16188
研究领域[WOS]Polymer Science
关键词[WOS]POLYMER GEL ELECTROLYTE ; IONIC LIQUIDS ; ORGANIC-DYES ; STATE ; PERFORMANCE ; COMPOSITE ; DONOR ; FILMS
收录类别SCI
语种英语
WOS类目Polymer Science
WOS记录号WOS:000397212400014
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/14103
专题中国科学院广州能源研究所
作者单位1.Chinese Acad Sci, Guangdong Key Lab New & Renewable Energy Res & De, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Sci & Technol China, Hefei 230026, Peoples R China
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Shi, Ji-fu,Huang, Qi-zhang,Shen, Cheng-jia,et al. Polyvinyl Acetal-based Quasi-Solid-Sate Electrolytes and Their Application in Dye-sensitized Solar Cells[J]. ACTA POLYMERICA SINICA,2016(12):1735-1742.
APA Shi, Ji-fu,Huang, Qi-zhang,Shen, Cheng-jia,Zhu, Yan-qing,&Xu, Gang.(2016).Polyvinyl Acetal-based Quasi-Solid-Sate Electrolytes and Their Application in Dye-sensitized Solar Cells.ACTA POLYMERICA SINICA(12),1735-1742.
MLA Shi, Ji-fu,et al."Polyvinyl Acetal-based Quasi-Solid-Sate Electrolytes and Their Application in Dye-sensitized Solar Cells".ACTA POLYMERICA SINICA .12(2016):1735-1742.
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