Nano/Micro Metal‐Organic Framework‐Derived Porous Carbon with Rich Nitrogen Sites as Efficient Iodine Hosts for Aqueous Zinc‐Iodine Batteries

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Апрель 15, 2025

Nowadays, the low cost, superior safety, and long durability of aqueous zinc-iodine (Zn-I2) batteries have garnered significant interest. Nevertheless, their practical use is limited by inferior conductivity iodine shuttle effect, resulting in suboptimal electrochemical behavior. In this work, a nano/micro zinc-based metal-organic framework (Zn-MOF) featuring cubic morphology employed for obtaining porous nitrogen-doped carbon (NC), which reported as cathode host Zn-I2 batteries. Thanks to its architecture high NC, optimized S3-1000 material achieves loading enables rapid electron/ion transport. More importantly, adsorption experiments combined with density functional theory (DFT) calculations reveal that graphitic-N pyridine-N moieties within matrix synergistically serve active anchoring sites species, suppress polyiodide effects accelerate redox kinetics during conversion. As result, I2@S3-1000 highest specific capacity cycle stability over 10,000 cycles, while in-situ characterization analysis confirms reversible mechanism. Soft pack battery prototype flexible micro-battery based on are also fabricated show excellent flexibility. This study promotes development MOF-derived cathodes advanced

Язык: Английский

High yield porous carbon framework with co-active B N sites to promote polyiodide conversion for high performance Zn-I2 batteries

Journal of Colloid and Interface Science, Год журнала: 2025, Номер unknown, С. 138070 - 138070

Опубликована: Июнь 1, 2025

Язык: Английский