ZrOCl_2掺杂对磷硅酸盐凝胶质子导电性能的影响

Effect of ZrOCl_2 Doping on Proton Conductive Performances of the Phosphosilicate Gels

采用溶胶-凝胶技术研究了ZrOCl2·8H2O掺杂对磷硅酸盐凝胶质子导电性能的影响.结果表明,掺杂ZrOCl2.8H2O能提高磷硅酸盐凝胶的质子电导率,并且掺杂质量分数为0.97%时质子电导率达到最大值(σ130=2.38 S/m).掺杂样品在相对湿度为40%条件下放置30 d后,未发生H3PO4渗出现象,其质子传导性能基本不变.核磁共振谱结果表明,掺杂ZrOCl2减少了磷硅酸盐凝胶结构中自由磷酸的形成,提高了[PO4]与[SiO4]四面体之间的化学结合力.

Effect of ZrOCl2·8H2O doping on proton conductive properties of phosphosilicate gel was investigated by means of sol-gel method.The results prove that ZrOCl2·8H2O can increase proton conductivity of the gel,and that the sample with ZrOCl2·8H2O content of 0.97%（mass fraction） shows maximum proton conductivity of 2.38 S/m at 130 ℃.The doped samples,on which no H3PO4 were found to precipitate during storage under a condition of R.H.（relative humidity） 40% for a month,exhibited no apparent changes in proton conductive performances.NMR measurements revealed that introduction of ZrOCl2 to the gel could decrease the formation of isolated PO3-4 structural units and increase cross-linking between and tetrahedrons,thus resulted in an increase in both proton conductivity and chemical stability.