Tuning Zn²⁺ Deposition Kinetics towards Deep‐Reversible Zinc Metal Batteries with All‐Climate Adaptability

Abstract Uncontrollable Zn dendrites and severe hydrogen evolution reaction (HER) hamper the practical application of aqueous zinc‐metal batteries, which closely related to the deposition kinetics and thermodynamic stability of Zn anode. In this work, we returned to the classic perspectives of kinetics and thermodynamics, introducing a small amount of reduced glutathione (RGSH) to reshape the kinetic behavior of Zn 2+ deposition and increasing the thermodynamic energy barrier of HER. Specifically, the steric hindrance effect of RGSH tuned the electrochemical reduction kinetics to match Zn 2+ migration and increased the proportion of Zn 2+ in the bulk phase migration, thereby inducing dendrite‐free deposition behavior with ordered (002) texturing. Meanwhile, RGSH with abundant hydrogen bond donors and acceptors reconfigures the coordination network of water molecules for all‐climate adaptability, eliminating the accumulation of “dead Zn” at low temperature and the HER corrosion at high temperature. As a result, the advanced Zn||Zn symmetric cells deliver an extra‐long cycling performance (over 4600 h) and a wide temperature tolerance (−20 °C~70 °C). Additionally, the NH 4 V 4 O 10 ||Zn full cell can operate stably for over 1000 cycles with 84.3 % capacity retention. Surprisingly, the practical NH 4 V 4 O 10 ||Zn pouch cell with limited N/P ratio (2.3) reserved 84.1 % capacity after 150 cycles.