复合电解质Ti_(0.95)Al_(0.05)P_(2)O_(7)/NaPO_(3)/NaTi_(2)(PO_(4))_(3)的中温电性能研究

Intermediate temperature electrical properties of a Ti_(0.95)Al_(0.05)P_(2)O_(7)/NaPO_(3)/NaTi_(2)(PO_(4))_(3)composite clectrolyte

本文以H_(3)PO_(4)、TiO_(2)、Al_(2)O_(3)和草酸钠为原料,合成了复合电解质Ti_(0.95)Al_(0.05)P_(2)O_(7)/NaPO_(3)/NaTi_(2)(PO_(4))_(3)。采用XRD对复合电解质的结构进行了表征。研究了其在400-800℃范围内的电导率,并以Ti_(0.95)Al_(0.05)P_(2)O_(7)/NaPO_(3)/NaTi_(2)(PO_(4))_(3);为电解质隔膜组装了H_(2)/O_(2)燃料电池。XRD结果表明反应物经过充分反应,形成了三元复合电解质。800℃时,Ti_(0.95)Al_(0.05)P_(2)O_(7)/NaPO_(3)/NaTi_(2)(PO_(4))_(3)有最高电导率6.0×10^(-2)S·cm^(-1)。800℃时开路条件下复合电解质的极化电阻值为0.23Ω·cm^(2),燃料电池最大功率密度为90.6 mW·cm^(2)。

In this study,Ti0.95Al0.05P2O7/Na PO3/Na Ti2(PO4)3 was synthesized using sodium oxalate,TiO2,Al2O3 and H3PO4 as raw materials.The crystal structure of Ti0.95Al0.05P2O7/NaPO3/NaTi2(PO4)3 was tested by X-ray diffraction (XRD).The conductivities were studied in the range of 400-800°C.The composite electrolyte was used as electrolyte separator to assemble H2/O2 fuel cell.XRD results showed that the ternary composite electrolyte was formed after fully reaction.The highest conductivity of Ti0.95Al0.05P2O7/Na PO3/NaTi2(PO4)3 was reached 6.0×10-2S·cm-1at 800°C.The polarization resistance of the composite electrolyte was 0.23Ω·cm2 and the highest power density of Ti0.95Al0.05P2O7/Na PO3/NaTi2(PO4)3 was 90.6 m W·cm-2at 800°C,respectively.