π-d conjugated coordination polymers (CCPs) with unique stacking structures are developed for the nanoconfinement of iodine by chemisorption in an aqueous Zn-I₂ battery. The stacking structure allows for the accumulation of localized electrons on a well-ordered atomic array, which enhances the built-in electric field, thereby optimizing the environment for the evolution of iodine species. The assembled I⁻/I⁰ two-electron-transfer Zn-I₂ battery provides a specific capacity of 226.4 mAh g⁻¹ at 0.4 A g⁻¹ (an overpotential of 42 mV) and achieves 60,000 cycles at 10 A g⁻¹. The assembled I⁻/I⁰/I⁺ four-electron-transfer Zn-I₂ battery provides a specific capacity of up to 337.1 mAh g⁻¹ at 5 A g⁻¹ with outstanding rate performance (155.6 mAh g⁻¹ at 50 A g⁻¹) and cycle performance (12,000 cycles at 10 A g⁻¹). This study employs targeted molecular design and systematic optimization to develop a high-performance aqueous Zn-I₂ battery electrode material enabled with the promising four-electron transfer reaction.

中文翻译：

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π-d 共轭配位介导的四电子转移快速充电水性锌碘电池的催化作用


具有独特堆叠结构的 π-d 共轭配位聚合物 （CCP） 被开发用于通过在水性 Zn-I ₂ 电池中通过化学吸附对碘进行纳米限制。堆叠结构允许在有序的原子阵列上积累局部电子，从而增强内置电场，从而优化碘种类进化的环境。组装的 I ⁻ /I ⁰ 双电子转移 Zn-I ₂ 电池在 226.4 A g ⁻¹ 时提供 0.4 mAh g ⁻¹ 的比容量（过电位为 42 mV），并在 60,000 A g ⁻¹ 时实现 10 次循环。组装的 I ⁻ /I ⁰ /I ⁺ 四电子转移 Zn-I ₂ 电池在 5 A g ⁻¹ 时提供高达 337.1 mAh g ⁻¹ 的比容量，具有出色的倍率性能（155.6 A g ⁻¹ 时为 50 mAh g ⁻¹ ）和循环性能（12,000 A g ⁻¹ 时 10 次循环）。本研究采用有针对性的分子设计和系统优化，开发了一种高性能的水性 Zn-I ₂ 电池电极材料，该材料具有很有前景的四电子转移反应。