柠檬酸燃烧法合成Al掺杂Sr_2MgMoO_(6-δ)阳极材料及其性能

Synthesis and properties of Al-doped Sr_2MgMoO_(6-δ) anode materials via citrate acid-complex combustion

通过柠檬酸燃烧法合成了Sr2Mg1-xAlxMoO6-δ(SMAM)阳极材料.利用X射线衍射仪和扫描电镜对其结构和形貌进行表征.考察了制备条件对其结构和致密度的影响.结果表明,还原气氛不利于材料的致密化,而氧化气氛可以促进材料的致密化过程.与氧化气氛相比,还原气氛下Al离子在材料中的固溶度较大.对氧化气氛下制备的SMAM样品在低温下进行还原,可以增加Al离子的固溶量.同时,材料的电导率随着Al含量的增加而增大.

Sr2Mg1-xAlxMoO6-δ（SMAM） anode materials were synthesized via citrate acid-complex combustion.X-ray diffraction and scanning electron microscopy were employed to characterize their lattice structure and microstructure,respectively.The effects of sintering conditions on the lattice structure and compactness were investigated.The results revealed that the reducing atmosphere is unfavorable for the densification of SMAM materials,but the oxidizing atmosphere can promote the densification process.The solution limit of Al ions in SMAM is relatively higher in the reducing atmosphere compared to the oxidizing atmosphere.For an SMAM sample prepared in the oxidizing atmosphere,reducing it at low temperature can increase the solubility of Al in SMAM.The conductivity of SMAM samples increases with increasing Al content.