Potassium (K) metal is the “super star” among all the anode materials for potassium-ion batteries because of its merits such as large abundance (∼0.0017 wt %), high theoretical specific capacity (687 mAh g⁻¹) and low electrochemical potential (−2.93 V vs. the standard hydrogen electrode, SHE). Nevertheless, challenges such as extremely high reactivity, large volume change, unstable interface and uncontrollable growth of K dendrites hinder its further development and practical application. Various effective tactics have been put forward to solve the issues of K metal anodes in recent years. Herein, we detailedly summarize the recent strategies for stable and dendrite-free K metal anodes such as designing a host, interfacial engineering, replacing pure K metal with K-based alloys, modifying liquid electrolyte and replacing liquid electrolyte with solid-state electrolyte. We also proposed some perspectives and outlooks. We believe this review can attract related researchers and provide some help for the future development of K metal anodes.

钾（K）金属是钾离子电池所有负极材料中的“超级明星”，因为它具有丰度大（〜0.0017 wt％），理论比容量高（687 mAh g ^-1）等优点。）和低电化学势（相对于标准氢电极SHE为-2.93 V）。然而，诸如K树枝状晶体的极高反应性，大体积变化，不稳定的界面和不可控制的生长等挑战阻碍了其进一步的发展和实际应用。近年来，已经提出了各种有效的策略来解决K金属阳极的问题。在本文中，我们详细总结了稳定和无枝晶的K金属阳极的最新策略，例如设计主体，界面工程，用K基合金替代纯K金属，改性液体电解质以及用固态电解质替代液体电解质。我们还提出了一些观点和前景。我们相信这篇综述可以吸引相关的研究人员，并为K金属阳极的未来发展提供一些帮助。