22:T436,Aqueous rechargeable batteries are desirable for energy storage because of their low cost and high safety. However, low capacity and short cyclic life are significant obstacles to their practical applications. Here, we demonstrate a highly reversible aqueous zinc–iodine battery using encapsulated iodine in microporous carbon as the cathode material by controlling solid–liquid conversion reactions. We identified the factors influencing solid–liquid conversion reactions, e.g., the pore size, surface chemistry of carbon host, and solvent effect. Rational manipulation of the competition between the adsorption in carbon and solvation in electrolytes for iodine species is responsible for the high reversibility and cyclic stability. The zinc–iodine battery delivers a high capacity of 174.4 mAh g–1 at 1C, stable cyclic life over 3000 cycles with ∼90% capacity retention, and negligible self-discharge. We believe that the principles for stabilizing the zinc–iodine system could provide new insight for other conversion systems such as lithium–sulfur systems.23:T4ad,As an effective method to improve the optical properties and stability of perovskite matrix, doped halide perovskites have attracted extensive attention in the field of optoelectronic applications. Herein, a series of all inorganic lead-free Te⁴⁺-doped Cs₂ZrCl₆ vacancy-ordered perovskites were successfully synthesized with different Te-doping concentrations by a solvothermal method, and deliberate Te⁴⁺-doping results in green-yellow triplet self-trapped exciton (STE) emission with a high photoluminescence quantum yield (PLQY) of 49.0%. The efficient energy transfer was observed from singlet to triplet emission. Further, the effects of A-site Rb alloying on the optical properties and stability were investigated. We found that A-site Rb alloying and C-site cohalogenation did not change the luminescence properties of Te⁴⁺, but the addition of a small amount of Rb⁺ can improve the PL intensity and moisture stability. Our results provide physical insights into the nS² Te⁴⁺-ion-doping-induced emissive mechanism and shed light on improving the environmental stability for further applications.24:T504,Rechargeable aqueous zinc ion batteries are enabled by the (de)intercalation chemistry, but bottlenecked by the limited energy density due to the low capacity of cathodes. In this work, carbon nanotubes supported 50 wt% sulfur (denoted as S@CNTs-50), as a conversional cathode, is employed and a high energy density aqueous zinc-sulfur (Zn-S) battery is constructed . In the electrolyte of 1 m Zn(CH₃COO)₂ (pH = 6.5) with 0.05 wt% I₂ additive where I₂ can serve as medium of Zn²⁺ ions to reduce the voltage hysteresis of S@CNTs-50 and stabilize Zn stripping/plating, S@CNTs-50 delivers a high capacity of 1105 mAh g^-1 with a flat discharge voltage of 0.5 V, realizing an energy density of 502 Wh kg^-1 based on sulfur, which is one of the highest values reported in aqueous Zn-based batteries that use mild electrolyte. Moreover, the chemical materials cost of this aqueous Zn-S battery can be lowered to be $45 kWh^-1 due to the cheap raw materials, reaching to the level of pumped energy storage. Ex situ X-ray diffraction, Raman spectra, X-ray photoelectron spectrum, and transmission electron microscopy measurements reveal that sulfur cathode undergoes a conversion reaction between S and ZnS.25:T4ef,Abstract Mixed cation hybrid perovskites such as Cs x FA 1− x PbI 3 are promising materials for solar cell applications, due to their excellent photoelectronic properties and improved stability. Although power conversion efficiencies (PCEs) as high as 18.16% have been reported, devices are mostly processed by the anti‐solvent method, which is difficult for further scaling‐up. Here, a method to fabricate Cs x FA 1− x PbI 3 by performing Cs cation exchange on hybrid chemical vapor deposition gr

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