Citation: FU Jing, LIN Rui, LV Hong, WANG Xiao-Lei, MA Jian-Xin, QIAO Jin-Li. Preparation and Properties of Poly(vinyl alcohol)/Poly(vinyl pyrrolidone) Composites for Solid Alkaline Electrolyte Membranes[J]. Acta Physico-Chimica Sinica, ;2010, 26(10): 2653-2658. doi: 10.3866/PKU.WHXB20100918 shu

Preparation and Properties of Poly(vinyl alcohol)/Poly(vinyl pyrrolidone) Composites for Solid Alkaline Electrolyte Membranes

FU Jing ^1,2 ,
LIN Rui ² ,
LV Hong ² ,
WANG Xiao-Lei ² ,
MA Jian-Xin ^1,2, ,
QIAO Jin-Li ^3,

1.
1. School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China;
2. Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804, P. R. China;
3. School of Environmental Science and Engineering, Donghua University, Shanghai 201260, P. R. China

Received Date: 16 March 2010
Available Online: 27 September 2010
Fund Project: 上海市浦江人才基金(08PJ14096) (08PJ14096)上海市自然科学基金(09ZR1433300) (09ZR1433300)教育部归国留学人员基金(2009(1001))资助项目 (2009(1001))

Solid alkaline electrolyte membranes were prepared using poly(vinyl alcohol)/poly(vinyl pyrrolidone) (PVA/PVP) by KOH doping. The composition, microstructure, thermal stability, ionic conducitvity and methanol uptake of the composite membranes were investigated in detail. The wholly transparent, homogeneous and compact PVA/PVP/KOH composite membranes were obtained when m(PVA) :m(PVP)=1 :0.5 in a mass ratio and no obvious phase seperation was observed. The ionic conductivity and thermal stability of the PVA/PVP membranes increased greatly with increasing the content of PVP. A high ionic conductivity of 2.01 ×10^-3S·cm^-1was obtained whena mass ratio of m(PVA) :m(PVP)=1 :1 was used. In additon, the methanol uptake of the PVA/PVP/KOH membranes showed almost no change after conditioning at elevated temperatures and it was 4 times lower than that of the Nafion 115 membrane after conditioning at 100 ℃. These membranes are, therefore, promising solid alkaline electrolyte membranes for use in alkaline direct methanol fuel cells at elevated operating temperature.
- Solid alkaline electrolyte membrane,
- Poly(vinyl alcohol),
- Poly(vinyl pyrrolidone),
- Ionicconductivity,
- Methanol uptake,
- Thermal stability
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