Recent Advances in Lithium Resource Extraction Utilizing Oxide‐Based Lithium Superionic Conductors

Abstract Lithium (Li), as a strategic metal resource, is essential for lithium‐ion batteries, ceramics, and other advanced materials. Liquid lithium resources like brines and seawater are abundant, but the presence of interfering ions such as Mg 2+ and Na + complicates extraction. Current separation technologies struggle with precise Li + extraction due to chemical similarity with Mg 2+ and Na + , requiring novel, efficient, and energy‐saving methods. Oxide‐based lithium superionic conductors (LISCs) have selective Li + migration pathways, enabling lattice‐matched Li + passage, effective inhibition of divalent Mg 2+ and oversized Na + migration, and almost complete Li–Mg and Li–Na separation. Furthermore, oxide‐based LISCs can be employed for lithium recovery from challenging feedstocks, such as spent lithium‐ion battery electrode materials and lithium‐containing molten salts, as well as for the separation of highly similar lithium isotopes ( 6 Li/ 7 Li). The utilization of LISCs as an effective separator for lithium‐related resources represents an emerging field of high‐efficiency separation process with functional new materials, which may result in a breakthrough in science and technology. This review summarizes recent advances in the application of oxide‐based LISCs for Li separation from diverse raw materials, including seawater/brines, spent lithium‐ion battery electrodes, and lithium‐containing molten salts. Additionally, it critically evaluates challenges and potential solutions for practical implementation.