Cathodes of rechargeable Zn batteries typically face the issues of irreversible phase transformation, structure collapse, and volume expansion during repeated charge/discharge cycles, which result in an increased transfer resistance and poor long‐term cycling stability. Herein, a facile F doping strategy is developed to boost the cycling stability of nickel cobalt carbonate hydroxide (NiCo–CH) cathode. Benefiting from the extremely high electronegativity, the phase and morphology stabilities as well as the electrical conductivity of NiCo–CH are remarkably enhanced by F incorporation (NiCo–CH–F). Phase interface and amorphous microdomains are also introduced, which are favorable for the electrochemical performance of cathode. Benefiting from these features, NiCo–CH–F delivers a high capacity (245 mA h g⁻¹), excellent rate capability (64% retention at 8 A g⁻¹), and outstanding cycling stability (maintains 90% after 10 000 cycles). Moreover, the quasi‐solid‐state battery also manifests superior cycling stability (maintains 90% after 7200 cycles) and desirable flexibility. This work offers a general strategy to boost the cycling stability of cathode materials for aqueous Zn batteries.

中文翻译：

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通过在镍钴碳酸盐氢氧化物阴极中进行F掺杂来提高水性柔性Zn电池的循环稳定性。

Zn充电电池的阴极通常面临不可逆的相变，结构崩溃以及在重复的充电/放电循环过程中体积膨胀的问题，这导致转移电阻增加和长期循环稳定性差。在此，开发了一种简便的F掺杂策略来增强氢氧化镍钴酸钴（NiCo-CH）阴极的循环稳定性。得益于极高的电负性，F的掺入（NiCo-CH-F）显着增强了NiCo-CH的相和形态稳定性以及电导率。还引入了相界面和非晶微区，这有利于阴极的电化学性能。受益于这些功能，NiCo–CH–F具有高容量（245 mA hg ^-1），出色的速率能力（在8 A g ^-1时保留64％）和出色的循环稳定性（在1万次循环后保持90％）。此外，准固态电池还具有出色的循环稳定性（7200次循环后可保持90％）和所需的灵活性。这项工作提供了一种通用的策略来提高用于含水Zn电池的正极材料的循环稳定性。