TY - JOUR
T1 - Highly stable hydroxyl anion conducting membranes poly(vinyl alcohol)/poly(acrylamide-co-diallyldimethylammonium chloride) (PVA/PAADDA) for alkaline fuel cells
T2 - Effect of cross-linking
AU - Qiao, Jinli
AU - Fu, Jing
AU - Liu, Lingling
AU - Liu, Yuyu
AU - Sheng, Jiawei
N1 - Funding Information:
This work is financially supported by Pujiang Foundation ( 08PJ14096 ) of Shanghai, China and Natural Science Fundation ( 09ZR1433300 ) of Shanghai Science and Technology Committee, China; the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry of China and the Opening Foundation of Zhejing Provincial Top Key Discipline. Thanks also to "Strategic Energy and Resource Management and Sustainable Solutions" Tohoku University Environmental Leader Program of Japan and the Shanghai Leading Academic Discipline Project (B604) Fund.
PY - 2012/3
Y1 - 2012/3
N2 - Highly stable hydroxyl anion conducting membranes have been developed using poly(vinyl alcohol) (PVA) as matrix by incorporation of poly(acrylamide-co- diallyldimethylammonium chloride) (PAADDA) as anion charge carriers. In order to clarifying the cross-linking effect on membrane performances, two series of PVA/PAADDA membranes were prepared by direct and indirect chemical cross-linking ways, and have been characterized in detail at structural and hydroxyl ion (OH-) conducting property by FTIR spectroscopy, thermal gravity analysis (TG), scanning electron microscopy (SEM), water sorption, ion exchange capacity and alkaline resistance stability. The OH- conductivity of the membranes increased with increasing the content of PAADDA in polymer and temperature, and reached 0.74-12 mS cm-1 with direct cross-linking way and 0.66-7.1 mS cm-1 with indirect cross-linking way in the temperature range 30-90°C. The membranes are found to have the same IEC values but the membranes with direct cross-linking way showed higher water uptake than that with indirect cross-link one. Both membranes showed the thermal stability above 200°C, and can integrity in 100°C hot water and methanol solution, where the swelling are better suppressed as high dense chemical cross-linkages in PVA network. Very low methanol permeability (from 1.82 × 10-7 to 3.03 × 10-7 cm2 s-1) in 50% methanol solution was obtained at 30°C. Besides, the chemical stability in 80°C, 6 M hot alkali conditions and long-term stability of 350 h in 60°C hot water revealed that the PVA/PAADDA membranes are promising for potential application in alkaline fuel cells.
AB - Highly stable hydroxyl anion conducting membranes have been developed using poly(vinyl alcohol) (PVA) as matrix by incorporation of poly(acrylamide-co- diallyldimethylammonium chloride) (PAADDA) as anion charge carriers. In order to clarifying the cross-linking effect on membrane performances, two series of PVA/PAADDA membranes were prepared by direct and indirect chemical cross-linking ways, and have been characterized in detail at structural and hydroxyl ion (OH-) conducting property by FTIR spectroscopy, thermal gravity analysis (TG), scanning electron microscopy (SEM), water sorption, ion exchange capacity and alkaline resistance stability. The OH- conductivity of the membranes increased with increasing the content of PAADDA in polymer and temperature, and reached 0.74-12 mS cm-1 with direct cross-linking way and 0.66-7.1 mS cm-1 with indirect cross-linking way in the temperature range 30-90°C. The membranes are found to have the same IEC values but the membranes with direct cross-linking way showed higher water uptake than that with indirect cross-link one. Both membranes showed the thermal stability above 200°C, and can integrity in 100°C hot water and methanol solution, where the swelling are better suppressed as high dense chemical cross-linkages in PVA network. Very low methanol permeability (from 1.82 × 10-7 to 3.03 × 10-7 cm2 s-1) in 50% methanol solution was obtained at 30°C. Besides, the chemical stability in 80°C, 6 M hot alkali conditions and long-term stability of 350 h in 60°C hot water revealed that the PVA/PAADDA membranes are promising for potential application in alkaline fuel cells.
KW - Alkaline resistance stability
KW - Anion-exchange membrane
KW - Cross-linking effect
KW - Dimensional stability
KW - Hydroxide ion conductivity
KW - Methanol permeability
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U2 - 10.1016/j.ijhydene.2011.06.038
DO - 10.1016/j.ijhydene.2011.06.038
M3 - Article
AN - SCOPUS:84856716213
VL - 37
SP - 4580
EP - 4589
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 5
ER -