Using diatomite and lithium carbonate as raw materials, a porous Li₄SiO₄ ceramic separator is prepared by sintering. The separator has an abundant and uniform three-dimensional pore structure, excellent electrolyte wettability, and thermal stability. Lithium ions are migrated through the electrolyte and uniformly distributed in the three-dimensional pores of the separator. The sintering temperature has an important influence on the composition of the ceramic separator. When the sintering temperature reaches 650 °C, pure Li₄SiO₄ is synthesized. The large porosity and excellent electrolyte affinity provide a maximum ionic conductivity of 1.18 mS cm^-1 for the LSCS650 ceramic separator. After 120 charge-discharge cycles, the lithium iron phosphate battery assembled with the LSCS650 separator has a discharge specific capacity of 128.4 mA h g^-1 and a capacity retention rate of nearly 100% at a current density of 1 C. Meanwhile, at a high current density of 10 C, the cell still has a discharge capacity of 71.4 mA h g^-1. Therefore, the Li₄SiO₄ ceramic separator has a good application prospect in high-power lithium-ion batteries.

以硅藻土和碳酸锂为原料，采用烧结法制备多孔Li ₄ SiO _{4陶瓷隔膜。}该隔膜具有丰富均匀的三维孔结构、优异的电解液润湿性和热稳定性。锂离子通过电解质迁移并均匀分布在隔膜的三维孔隙中。烧结温度对陶瓷隔板的成分有重要影响。当烧结温度达到650℃时，合成了纯Li ₄ SiO _{4 。}大孔隙率和出色的电解质亲和力提供了 1.18 mS cm ^{-1的最大离子电导率}适用于 LSCS650 陶瓷分离器。采用LSCS650隔膜组装的磷酸铁锂电池经过120次充放电循环后，放电比容量为128.4 mA hg ^-1，在1 C电流密度下容量保持率接近100%。同时，在高倍率下在 10 C 的电流密度下，电池仍具有 71.4 mA hg ^-1的放电容量。因此，Li ₄ SiO ₄陶瓷隔膜在大功率锂离子电池中具有良好的应用前景。