The fundamentals and perspectives in developing zinc-ion electrolyte have been comprehensively revealed, include the basic characteristics, electrolyte/electrode interfaces, practical consideration and future perspectives.

A synergetic effect involving Mg and Ca can reduce the adverse impact on redox reactions related to Ni–O bonding in Mg and Ca co-doped P2-Na _0.67 Ni _0.33 Mn _0.66 O ₂ material, leading to better overall properties than its singly-doped counterparts.

We fabricate carbon quantum dot-modified Na ₃ V ₂ (PO ₄ ) ₂ F ₃ hierarchical microspheres, which exhibit outstanding high-rate and ultralong-life performance as a half-cell cathode. A Na-ion full-cell (with a hard carbon anode) delivers high cell voltage and good cycling stability.

Sodium superionic conductor (NASICON)-type compounds have been regarded as promising cathodes for sodium-ion batteries (SIBs) due to their favorable ionic conductivity and robust structural stability. However, their high cost and relatively low energy density restrict their further practical application, which can be tailored by widening the operating voltages with earth-abundant elements such as Mn. Here, we propose a rational strategy of infusing Mn element in NASICON frameworks with sufficiently mobile sodium ions that enhances the redox voltage and ionic migration activity. The optimized structure of Na_3.5Mn_0.5V_1.5(PO₄)₃/C is achieved and investigated systematically to be a durable cathode (76.6% capacity retention over 5,000 cycles at 20 C) for SIBs, which exhibits high reversible capacity (113.1 mAh·g⁻¹ at 0.5 C) with relatively low volume change (7.6%). Importantly, its high-areal-loading and temperature-resistant sodium ion storage properties are evaluated, and the full-cell configuration is demonstrated. This work indicates that this Na_3.5Mn_0.5V_1.5(PO₄)₃/C composite could be a promising cathode candidate for SIBs.

Dual carbon-protected MoSe₂ nanorods can enable controlled volume fluctuation, permit continuous electron transfer, and offer more active sites and good redox reversibility.