Irregular deposition and sluggish reduction kinetics of zinc ions (Zn²⁺) are major causes of dendrite growth, which significantly shortens the lifespan of zinc-ion batteries. Locally promoting Zn²⁺ transport and directing Zn deposition are expected to circumvent the above challenges. Herein, the concept of pre-polarized Zn²⁺ channels is proposed to accelerate the kinetics of Zn²⁺ and promote uniform Zn deposition. As a proof-of-concept material, barium titanate (BaTiO₃) is utilized to exert polarization effects (the Maxwell–Wagner effect), which stem from the re-orientation of the BaTiO₃ static electrical domain by applying an external electrical field. The polarized BaTiO₃ porous nanofibers generate an orientational static electric field to form pre-polarized channels that homogenize Zn²⁺ distribution at the electrode/electrolyte interface, thus facilitating flat zinc metal deposition. This design endows the cell with stable Zn plating/stripping for 2800 hours at a current density of 1 mA cm⁻² and areal capacity of 0.5 mA h cm⁻². Full Zn//MnO₂ cells equipped with pre-polarized channels maintain a specific capacity of 77 mA h g⁻¹ after 3500 cycles at a current density of 5 A g⁻¹. This research advances material design by polarizing the electric field to regulate Zn²⁺ channels.

中文翻译：

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通过锌离子电池的预极化离子通道加速离子迁移并稳定界面沉积

^{锌离子（Zn 2+} ）的不规则沉积和缓慢的还原动力学是枝晶生长的主要原因，这显着缩短了锌离子电池的寿命。局部促进Zn ²⁺传输和引导Zn沉积有望克服上述挑战。在此，提出预极化Zn ^{2+通道的概念来加速Zn 2+}的动力学并促进均匀的Zn沉积。作为一种概念验证材料，钛酸钡 (BaTiO ₃ ) 用于发挥极化效应（麦克斯韦-瓦格纳效应），该效应源自通过施加外部电场对 BaTiO ₃静电域进行重新定向。极化的BaTiO ₃多孔纳米纤维产生定向静电场，形成预极化通道，使电极/电解质界面上的Zn ^{2+分布均匀，从而促进平坦的锌金属沉积。该设计赋予电池在1 mA cm -2}的电流密度和0.5 mA h cm ^-2的面积容量下稳定的镀锌/脱锌2800小时。配备有预极化通道的全Zn//MnO _{2电池在5 A g} ^-1的电流密度下循环3500次后保持77 mA hg ^-1的比容量。这项研究通过极化电场来调节 Zn ²⁺通道，从而推进了材料设计。