TY - JOUR
T1 - Development of cesium phosphotungstate salt and chitosan composite membrane for direct methanol fuel cells
AU - Xiao, Yanxin
AU - Xiang, Yan
AU - Xiu, Ruijie
AU - Lu, Shanfu
PY - 2013
Y1 - 2013
N2 - A novel composite membrane has been developed by doping cesium phosphotungstate salt (CsxH3-xPW12O 40 (0 ≤ x ≤3), Csx-PTA) into chitosan (CTS/Cs x-PTA) for application in direct methanol fuel cells (DMFCs). Uniform distribution of Csx-PTA nanoparticles has been achieved in the chitosan matrix. The proton conductivity of the composite membrane is significantly affected by the Csx-PTA content in the composite membrane as well as the Cs substitution in PTA. The highest proton conductivity for the CTS/Csx-PTA membranes was obtained with x = 2 and Cs 2-PTA content of 5 wt%. The value is 6 10-3 S cm-1 and 1.75 10-2 S cm-1 at 298 K and 353 K, respectively. The methanol permeability of CTS/Cs2-PTA membrane is about 5.6 × 10-7, 90% lower than that of Nafion-212 membrane. The highest selectivity factor (φ) was obtained on CTS/Cs2-PTA-5 wt% composite membrane, 1.1 × 104/S cm-3 s. The present study indicates the promising potential of CTS/Csx-PTA composite membrane as alternative proton exchange membranes in direct methanol fuel cells.
AB - A novel composite membrane has been developed by doping cesium phosphotungstate salt (CsxH3-xPW12O 40 (0 ≤ x ≤3), Csx-PTA) into chitosan (CTS/Cs x-PTA) for application in direct methanol fuel cells (DMFCs). Uniform distribution of Csx-PTA nanoparticles has been achieved in the chitosan matrix. The proton conductivity of the composite membrane is significantly affected by the Csx-PTA content in the composite membrane as well as the Cs substitution in PTA. The highest proton conductivity for the CTS/Csx-PTA membranes was obtained with x = 2 and Cs 2-PTA content of 5 wt%. The value is 6 10-3 S cm-1 and 1.75 10-2 S cm-1 at 298 K and 353 K, respectively. The methanol permeability of CTS/Cs2-PTA membrane is about 5.6 × 10-7, 90% lower than that of Nafion-212 membrane. The highest selectivity factor (φ) was obtained on CTS/Cs2-PTA-5 wt% composite membrane, 1.1 × 104/S cm-3 s. The present study indicates the promising potential of CTS/Csx-PTA composite membrane as alternative proton exchange membranes in direct methanol fuel cells.
KW - Alternative proton exchange membranes
KW - Cesium phosphotungstate salt
KW - Chitosan
KW - Direct methanol fuel cells
KW - Methanol crossover
UR - https://www.scopus.com/pages/publications/84879818155
U2 - 10.1016/j.carbpol.2013.06.017
DO - 10.1016/j.carbpol.2013.06.017
M3 - 文章
C2 - 23987340
AN - SCOPUS:84879818155
SN - 0144-8617
VL - 98
SP - 233
EP - 240
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
IS - 1
ER -