无机质子导体SnP2O7及其复合膜

合成了无机质子导体SnP₂O₇，测定了其从室温到250 ℃不加湿条件下的电导率，170 ℃时，SnP₂O₇的电导率最高为0.053 S/cm。通过溶液浇铸法，分别制备了SnP₂O₇与聚偏氟乙烯 (PVDF) 及磺化聚醚醚酮 (SPEEK) 的复合膜。210 ℃时，SnP₂O₇质量分数为60%的SnP₂O₇/PVDF和SnP₂O₇/SPEEK复合膜的电导率分别为9.2×10^-5 S/cm及9.3×10^-5 S/cm。对SnP₂O₇及其复合膜的质子传导机理，进行了初步探讨。测定了复合膜的机械强度，130 ℃时SnP₂O₇/PVDF的断裂拉伸强度明显优于SnP₂O₇/SPEEK复合膜。

Inorganic proton conductor SnP2O7 and its hybrid membranes

Inorganic proton conductor SnP2O7 was synthesized. Its conductivity was measured from ambient temperature to 250℃ without humidification. At 170℃, a highest conductivity of 0.053 S/cm was reached for SnP2O7. Hybrid membranes of SnP2O7 with polyvinylidenefluoride (PVDF) or sulfonated poly (ether ether) ketone (SPEEK) were prepared with a method of membrane casting from their solutions, respectively. For the hybrid membranes containing 60wt% SnP2O7, the conductivity at 210℃ was 9.2×10-5 S/cm for SnP2O7/PVDF, and was 9.3×10-5 S/cm for SnP2O7/SPEEK with a sulfonation degree of 51%, respectively. The proton conduction mechanism of SnP2O7 as well as its hybrid membranes was discussed. The mechanical strength of the hybrid membranes was measured. The tensile strength at break of SnP2O7/PVDF membranes was much higher than that of SnP2O7/SPEEK membranes at 130℃.