期刊
JOURNAL OF POWER SOURCES
卷 264, 期 -, 页码 83-91出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2014.04.095
关键词
Ionic liquid; Gel electrolyte; Quasi-solid-state dye-sensitized solar cell; Three-dimensional framework; Amphiphilic hydrogel
资金
- National Natural Science Foundation of China [61366003, U1037604]
- Science and Technology Project of the Education Department of Jiangxi Province, China [GJJ13474]
- Fundamental Research Funds for the Central Universities [201313001, 201312005]
- Shandong Province Outstanding Youth Scientist Foundation Plan [BS2013CL015]
- Doctoral Fund of Ministry of Education of China [20130132120023]
- Shandong Provincial Natural Science Foundation [ZR2011BQ017]
- Research Project for the Application Foundation in Qingdao [13-1-4-198-jch]
Liquid electrolytes containing redox species have been widely used in dye-sensitized solar cells (DSSCs), whereas the volatility of organic solvents has been a tremendous obstacle for their commercial application. To assemble durable DSSCs, here we report the synthesis of full-ionic liquid electrolyte, in which 1-butyl-3-methylimidazolium nitrate is employed as solvent and 1-methyl-3-propylimidazolium iodide is iodide source. Using the imbibition performance of amphiphilic poly(acrylic acid/gelatin) [poly(AA/GR)] and poly(acrylic acid/cetyltrimethyl ammonium bromide) [poly(AA/CTAB)] matrices, full-ionic liquid electrolytes are imbibed into three-dimensional framework of poly(AA/GR) or poly(AA/CTAB) to form stable gel electrolytes. Room-temperature ionic conductivities as high as 17.82 and 18.44 mS cm(-1) are recorded from full-ionic liquid imbibed poly(AA/GR) and poly(AA/CTAB) gel electrolytes, respectively. Promising power conversion efficiencies of 7.19% and 7.15% are determined from their DSSC devices in comparison with 6.55% and 6.12% from traditional acetonitrile-based poly(AA/GR) and poly(AA/CTAB) gel electrolytes, respectively. The new concept along with easy fabrication demonstrates the full-ionic liquid electrolytes to be good alternatives for robust gel electrolytes in quasi-solid-state DSSCs. (C) 2014 Elsevier B.V. All rights reserved.
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