AlF_(3)-CsH_(5)(PO_(4))_(2)中温质子导体电解质的制备及性能

Preparation and Characterization of AlF_(3)-CsH_(5)(PO_(4))_(2) Intermediate Temperature Proton Conductor

提出了一种磷酸五氢铯(CsH5(PO4)2)与氟化铝(AlF3)形成P-OH…F氢键的方法,同步提高了固体质子导体CsH5(PO4)2的热机械稳定性和导电率。结果表明,AlF_(3)-CsH_(5)(PO_(4))_(2)复合电解质即使在250℃的高温下也能保持坚固的固态,这比纯CsH5(PO4)2的熔化温度提高了100℃。同时,在AlF_(3)-CsH_(5)(PO_(4))_(2)复合电解质中,由于P-OH…F氢键的协同作用和CsH5(PO4)2固有的质子导电性能,使得AlF_(3)-CsH_(5)(PO_(4))_(2)具有相当大的质子电导率。AlF_(3)-CsH_(5)(PO_(4))_(2)复合材料在150℃、无水条件下的质子电导率高达0.0313 S/cm,这意味着AlF_(3)-CsH_(5)(PO_(4))_(2)复合材料是极有前景的中温质子导体材料。

This paper introduces a method for the formation of P-OH…F hydrogen bonds between CsH5(PO4)2and AlF3,which simultaneously improves the thermomechanical properties and conductivity of solid proton conductor CsH5(PO4)2.The results show that the AlF_(3)-CsH_(5)(PO_(4))_(2) composite electrolyte remains a robust solid state even at a high temperature of 250℃,which is 100℃higher than the melting point of pristine CsH5(PO4)2.Meanwhile,the AlF_(3)-CsH_(5)(PO_(4))_(2) exhibits a considerable proton conductivity due to the synergistic effect of P-OH…F hydrogen bonds and the inherent proton conductivity of CsH5(PO4)2in the AlF_(3)-CsH_(5)(PO_(4))_(2) composite.The proton conductivity of the AlF_(3)-CsH_(5)(PO_(4))_(2) composite at 150℃under an anhydrous condition is as high as 0.0313 S/cm,which means that the AlF_(3)-CsH_(5)(PO_(4))_(2) composite is a promising intermedium-temperature proton conductor.