Sulfide-Based Electrolytes for All-Solid-State Sodium Batteries
Abstract: All-solid-state sodium batteries with abundant resources, low cost, high safety, and high energy density show promising potential for grid-scale energy storage and electric vehicles, positioning them as strong candidates for the post-lithium era. Among them, sulfide-based solid electrolytes stand out due to the high room-temperature ionic conductivity, comparable to that of liquid
electrolytes, as well as their superior interfacial compatibility and ease of production, making them a rapidly growing focus of cutting-edge research. Nevertheless, critical challenges persist in current sulfide-based solid electrolytes research, including inadequate ionic conductivity, moisture sensitivity, and interfacial incompatibility, which deteriorate electrochemical performance and hinder practical implementation. Herein, a systematic overview of the structure, properties, and synthesis methods of several representative sulfide-based solid electrolytes is provided. Next, the key challenges and current optimization strategies are comprehensively summarized. Additionally, the assembly and battery performance of sulfide-based solid electrolytes in sodium systems, along with the long-overlooked safety risks and technical bottlenecks for industrial production, are discussed. Finally, a summary and recommendations for the identified and potential challenges of sulfide-based solid electrolytes for future research are proposed.
Cite as: H. Yang, L. Weckelmann, B. Wu, et al. “ Sulfide-Based Electrolytes for All-Solid-State Sodium Batteries.” Advanced Energy Materials (2026): e05208. https://doi.org/10.1002/aenm.202505208