High-Safety Design of Organic Electrolytes for Sodium-Ion Batteries.

The pursuit of intrinsically safe sodium-ion batteries (SIBs) with high energy density has spurred significant research into developing nonflammable organic liquid electrolytes, given their wide electrochemical stability window and excellent compatibility with electrodes. As safety requirements grow increasingly stringent, electrolyte design must comprehensively address both internal risks such as dendrite growth, parasitic reactions, and high flammability, and external abuses including overcharging and short circuits. In this review, the critical role of electrolytes in suppressing thermal runaway in SIBs is systematically elucidated, and contemporary methodologies for electrolyte safety assessment are summarized.

Tailoring Cathode-Electrolyte Interface for High-Power and Stable Lithium-Sulfur Batteries.

Global interest in lithium-sulfur batteries as one of the most promising energy storage technologies has been sparked by their low sulfur cathode cost, high gravimetric, volumetric energy densities, abundant resources, and environmental friendliness. However, their practical application is significantly impeded by several serious issues that arise at the cathode-electrolyte interface, such as interface structure degradation including the uneven deposition of LiS, unstable cathode-electrolyte interphase (CEI) layer and intermediate polysulfide shuttle effect. Thus, an optimized cathode-electrolyte interface along with optimized electrodes is required for overall improvement.