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目前固体快离子导体材料的研究十分活跃,作为离子导体主要载流子是Li~(+1)、Na~(+1)、Cu~(+1)和Ag~(+1)等离子。Li_2WO_4中的Li~(+1)离子电导率不高,我们希望通过加入二价Mg~(+2)离子后,在Li_2WO_4中形成部分替代式固溶体。在电价平衡上,一个Mg~(+2)离子将替换两个Li~(+1)离子,而一个Mg~(+2)离子只占据两个Li~(+1)离子中的一个位置,另一个Li~(+1)离子的位置将形成空位。这样,固体中空位增多,Li~(+1)离子将可能易于运动,从而增加离子电导率。此外,在Li_2WO_4中加入MgWO_4后,是否会形成新的化合物,也是本工作目的之一。
At present, the research on solid fast ionic conductor materials is very active. The main carriers of ionic conductors are Li ~ (+1), Na ~ (+1), Cu ~ (+1) and Ag ~ (+1). The Li ~ (+1) ion in Li_2WO_4 has low conductivity, and we hope that some substitutional solid solution will be formed in Li_2WO_4 by adding divalent Mg ~ (+2) ions. In the price balance, one Mg ~ (+2) ion will replace two Li ~ (+1) ions, and one Mg ~ (+2) ion occupy only one of two Li ~ (+1) Another Li ~ (+1) ion will form a vacancy. In this way, the solid vacancies increase, Li ~ (+1) ions will likely be easy to move, thereby increasing ionic conductivity. In addition, Li2WO_4 added MgWO_4, whether the formation of new compounds, but also one of the objectives.