Polyvinyl alcohol (PVA) based gel electrolytes: Characterisation and applications in Dye-sensitized solar cells / Mohd Fareezuan Abdul Aziz
Three systems of gel polymer electrolytes have been prepared in this work. First system was PVA-DMSO-EC-PC-KI-I2 gel polymer electrolytes. In the first system, various amount of KI salt were added. The highest conductivity of gel polymer electrolyte for the first system was 12.50 mS cm-1 for the...
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| Format: | Thesis |
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2017
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| Online Access: | http://studentsrepo.um.edu.my/8284/1/All.pdf http://studentsrepo.um.edu.my/8284/6/fareezuan.pdf http://studentsrepo.um.edu.my/8284/ |
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| Summary: | Three systems of gel polymer electrolytes have been prepared in this work. First system
was PVA-DMSO-EC-PC-KI-I2 gel polymer electrolytes. In the first system, various
amount of KI salt were added. The highest conductivity of gel polymer electrolyte for
the first system was 12.50 mS cm-1 for the gel polymer electrolyte with the composition
of 5.58 wt. % of PVA - 8.37 wt. % of EC - 11.16 wt. % of PC - 61.37 wt. % of DMSO -
11.72 wt. % of KI - 1.80 wt. % of I2. To this composition, part of KI was replaced with
the quaternary ammonium iodide salt which is TMAI, TPAI and TBAI for the second
system. The conductivity of the gel polymer electrolyte decreased with the increasing
amount of quaternary ammonium iodide salts. The best electrolyte in systems 2 which
gave the highest efficiency of 5.51 % and 5.80 %, respectively have been chosen for
incorporation with diethyl carbonate (DEC) plasticizer (systems 3). With the addition of
DEC plasticizer, the conductivity of the gel polymer electrolyte and efficiency of DSSC
were enhanced. The highest efficiency of 7.5 % was obtained for the DSSC having 5.47
wt. % of PVA - 8.21 wt. % of EC - 10.95 wt. % of PC - 60.22 wt. % of DMSO - 3.45
wt. % of KI - 8.05 wt. % of TBAI - 1.08 wt. % of I2 - 2.57 wt. % of DEC. The
interaction of gel polymer electrolytes have been studied via fourier transform infrared
(FTIR) spectroscopy. The peak shifting observed for S=O, O-H, C-O-C and C=O bands
indicates that the interaction has occurred. X-ray diffraction (XRD) pattern reveals that
all gel polymer electrolytes are amorphous. |
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