Powering device for miniaturized electronics is highly desired with well-maintained capacity and high-rate performance. Though Ni–Zn microbattery can meet the demand to some extent with intrinsic fast kinetic, it still suffers irreversible structure degradation due to the repeated lattice strain. Herein, a stable Ni–Zn microbattery with ultrahigh-rate performance is rationally constructed through in situ electrochemical approaches, including the reconstruction of nanoporous nickel and the introduction of epitaxial Zn(OH)₂ nanophase. With the enhanced ionic adsorption effect, the superior reactivity of the superficial nickel-based nanostructure is well stabilized. Based on facile miniaturization and electrochemical techniques, the fabricated nickel microelectrode exhibits 63.8% capacity retention when the current density is 500 times folded, and the modified hydroxides contribute to the great stability of the porous structure (92% capacity retention after 10 000 cycles). Furthermore, when the constructed Ni–Zn microbattery is measured in a practical metric, excellent power density (320.17 mW cm⁻²) and stable fast-charging performance (over 90% capacity retention in 3500 cycles) are obtained. This surface reconstruction strategy for nanostructure provides a new direction for the optimization of electrode structure and enriches high-performance output units for integrated microelectronics.

中文翻译：

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具有超高倍率能力的耐用镍锌微电池由具有外延相的原位重构纳米多孔镍实现

小型化电子设备的供电设备非常需要具有良好维护的容量和高速率性能。尽管 Ni-Zn 微电池可以在一定程度上满足需求，具有固有的快速动力学，但由于重复的晶格应变，它仍然遭受不可逆的结构退化。在此，通过原位电化学方法，包括纳米多孔镍的重构和外延Zn(OH) ₂的引入，合理构建了具有超高倍率性能的稳定Ni-Zn微电池。纳米相。随着离子吸附效应的增强，表面镍基纳米结构的优异反应性得到了很好的稳定。基于简便的小型化和电化学技术，制备的镍微电极在电流密度折叠 500 倍时表现出 63.8% 的容量保持率，并且改性氢氧化物有助于多孔结构的良好稳定性（10 000 次循环后容量保持率达 92%）。此外，当构建的 Ni-Zn 微电池以实用指标进行测量时，出色的功率密度 (320.17 mW cm ^-2) 和稳定的快速充电性能（3500 次循环容量保持率超过 90%）。这种纳米结构的表面重建策略为电极结构的优化提供了新的方向，丰富了集成微电子的高性能输出单元。