Aqueous acidic batteries are a good choice to respond to battery diversity, delivering safety, cost, environmental friendliness, and high-power necessary for renewable energy storage. However, the practical adoption is greatly challenged by low voltage and energy density due to the inadequate metal anode materials. Here, we report an interfacial regulated Sn metal anode as the solution of the last piece of the puzzle. The ease of recycling, low potential, fast redox kinetics, and high capacity of Sn perfectly fit the battery system, and the Sn metal shedding critical issue is successfully suppressed by promoting uniform deposition for added interaction from alloying. Consequently, this reversible Sn anode with 442 mAh g⁻¹ matches well to different types of cathodes. The as-assembled acidic batteries also demonstrate sufficient output voltage (up to 1.7 V), energy density (up to 312 Wh kg⁻¹ based on both electrodes), kinetics (up to 24 C), and stability (up to 2,400 cycles).

水系酸性电池是响应电池多样性的良好选择，提供可再生能源存储所需的安全性、成本、环境友好性和高功率。然而，由于金属负极材料的不足，实际采用受到低电压和能量密度的巨大挑战。在这里，我们报告了一种界面调节的 Sn 金属阳极作为最后一块拼图的解决方案。Sn 的易于回收、低电位、快速氧化还原动力学和高容量非常适合电池系统，并且通过促进均匀沉积以增加合金化的相互作用，成功地抑制了 Sn 金属脱落的关键问题。^{因此，这种具有 442 mAh g -1}的可逆 Sn 阳极与不同类型的阴极匹配良好。组装后的酸性电池还展示了足够的输出电压（高达 1.7 V）、能量密度（基于两个电极高达 312 Wh kg ⁻¹ ）、动力学（高达 24 C）和稳定性（高达 2,400 次循环） .