磷灰石结构硅酸镧氧离子导体的研究进展

Progress of the Research on Apatite-type Lanthanum Silicate Oxide-ion Conductor

磷灰石结构硅酸镧具有优良的氧离子导电性和化学稳定性,有望作为新一代中低温固体氧化物燃料电池电解质。综述了磷灰石结构硅酸镧的结构特征及导电机理,探讨了La位和Si位不同元素掺杂对硅酸镧电解质电导率的影响。概述了固相反应法、溶胶-凝胶法、凝胶-注模法、共沉淀法、熔融盐法合成硅酸镧的现状,指出了硅酸镧作为固体氧化物燃料电池电解质仍存在的问题及今后的发展方向。

Apatite-type lanthanum silicate （ATLS） is the most promising solid electrolyte for intermediate-low temperature solid oxide fuel cell because of its high oxide ionic conductivity and chemical stability. Structure character, conducting mechanism, and effects on the conductivity of ATLS with element doped on La/Si site are reviewed. Cur- rent developments of solid state reaction, sol-gel, gel-casting, co-precipitation, and molten salt methods are de- scribed. The maior existing problems of ATLS used as solid oxide fuel cell electrolyte and the future development are pointed out.