Electrolyte Additives for Room‐Temperature, Sodium‐Based, Rechargeable Batteries

Abstract Owing to resource abundance, and hence, a reduction in cost, wider global distribution, environmental benignity, and sustainability, sodium‐based, rechargeable batteries are believed to be the most feasible and enthralling energy‐storage devices. Accordingly, they have recently attracted attention from both the scientific and industrial communities. However, to compete with and exceed dominating lithium‐ion technologies, breakthrough research is urgently needed. Among all non‐electrode components of the sodium‐based battery system, the electrolyte is considered to be the most critical element, and its tailored design and formulation is of top priority. The incorporation of a small dose of foreign molecules, called additives, brings vast, salient benefits to the electrolytes. Thus, this review presents progress in electrolyte additives for room‐temperature, sodium‐based, rechargeable batteries, by enlisting sodium‐ion, Na−O 2 /air, Na−S, and sodium‐intercalated cathode type‐based batteries.