Preparation method of self-excitation perovskite-based composite lithium ion sieve

The invention relates to a preparation method of a self-excitation perovskite-based composite lithium ion sieve, which comprises the following steps: uniformly mixing an A-site material, a B-site material and a lithium salt template agent, sintering in one step, and removing lithium to prepare the self-excitation perovskite-based composite lithium ion sieve for adsorbing lithium ions with high selectivity, the lithium ion sieve prepared by the method can directly utilize natural kinetic energy to extract lithium from salt lake brine, and does not need other industrial equipment to provide energy. Therefore, the method is low-carbon and environment-friendly, has remarkable economic benefits, and particularly has important practical significance for extracting lithium from high-altitude salt lakes difficult to exploit. 一种自激发钙钛矿基复合锂离子筛的制备方法，将A位材料、B位材料和锂盐模板剂混合均匀后一步烧结并经脱锂步骤制备高选择性吸附锂离子的自激发钙钛矿基复合锂离子筛，该方法所制备的锂离子筛可直接利用天然动能于盐湖卤水中提锂，不需要其他工业设备提供能源。因此该方法低碳环保，具有显著的经济效益，特别对于高海拔难开采盐湖提锂具有重要的现实意义。