Solid-State Electrolytes for Sodium Metal Batteries

Abstract

The lower energy density and safety issues of liquid sodium-ion batteries have been unable to satisfy the ever-increasing demands for large-scale energy storage system. As a low-cost alternative, solid-state sodium metal batteries (SSMBs) have shown great competitive advantages and extensive application prospects due to their high energy density and desirable safety. However, the solid-state electrolytes (SSEs) often possess low ionic conductivity, and the poor interface compatibility and inferior stability between SSEs and electrodes can result in the continuous deterioration of the electrochemical performance. This review summarizes the recent progresses of sodium-based SSEs, including the sodium ion transport mechanisms of different types of SSEs, some emerging materials in different dimensions, and interface engineering. Furthermore, the critical challenges and new perspectives are emphasized in detail. This review provides deeper insights to construct more comprehensive and effective SSEs for next-generation high-performance SSMBs.

High Sodium Ion Mobility of PEO‐NaTFSI‐Na3Zr2Si2PO12 Composite Solid Electrolyte for All‐Solid‐State Na‐S Battery

“…Applying solid electrolytes in sodium‐sulfur batteries is one of the effective ways to circumvent the safety issues and eliminate the shuttle reactions. However, there is a gap in the research of solid electrolytes for use in all‐solid‐state Na−S battery (ASSB)’s [8,9] …”

“…However, there is a gap in the research of solid electrolytes for use in allsolid-state NaÀ S battery (ASSB)'s. [8,9] The electrochemical performance of ASSB's is mainly restricted by two challenges of low ionic conductivity of electrolytes and poor contact between the electrolyte and electrodes. [8,10] Inorganic solid electrolytes often display high ionic conductivity and ions mobility to meet the requirement of ASSB's.…”

Biomimetic Wood‐Inspired Batteries: Fabrication, Electrochemical Performance, and Sustainability within a Circular Perspective

“…In this regard, to avoid the major issues related to the high reactivity and instability of lithium and sodium metallic anodes, solid state electrolytes (SSEs) are a promising technology. [ 144 ] SSEs bear some pressing problems that need to be overcome. While inorganic SSEs show very high conductivities (>0.1 × 10 –3 S cm –1 ) and virtually a unity ion transference numbers, [ 145 ] they are difficult to process and present a poor strength.…”

Virtual Special Issue of Recent Research Advances in China: Batteries and Energy Storage

“…A full cell is further realized to demonstrate practicality of the film. Alternatively, Li et al focus on the development of solid-state electrolytes for sodium metal batteries, from the aspects of sodium-ion transport mechanisms, emerging materials, and interface engineering, which is expected to boost development of high-performance solid-state metal batteries.…”