阳极
原位
调制(音乐)
光电子学
电流(流体)
接口(物质)
电流密度
锌
材料科学
化学
电极
纳米技术
电气工程
复合材料
冶金
物理化学
声学
有机化学
工程类
物理
毛细管作用
量子力学
毛细管数
作者
Kefeng Ouyang,Sheng Chen,Wei Ling,Mangwei Cui,Qinghai Ma,Kun Zhang,Peixin Zhang,Yan Huang
标识
DOI:10.1002/anie.202311988
摘要
Abstract In aqueous electrolytes, the uncontrollable interfacial evolution caused by a series of factors such as pH variation and unregulated Zn 2+ diffusion would usually result in the rapid failure of metallic Zn anode. Considering the high correlation among various triggers that induce the anode deterioration, a synergistic modulation strategy based on electrolyte modification is developed. Benefitting from the unique pH buffer mechanism of the electrolyte additive and its capability to in situ construct a zincophilic solid interface, this synergistic effect can comprehensively manage the thermodynamic and kinetic properties of Zn anode by inhibiting the pH variation and parasitic side reactions, accelerating de‐solvation of hydrated Zn 2+ , and regulating the diffusion behavior of Zn 2+ to realize uniform Zn deposition. Thus, the modified Zn anode can achieve an impressive lifespan at ultra‐high current density and areal capacity, operating stably for 609 and 209 hours at 20 mA cm −2 , 20 mAh cm −2 and 40 mA cm −2 , 20 mAh cm −2 , respectively. Based on this exceptional performance, high loading Zn||NH 4 V 4 O 10 batteries can achieve excellent cycle stability and rate performance. Compared with those previously reported single pH buffer strategies, the synergistic modulation concept is expected to provide a new approach for highly stable Zn anode in aqueous zinc‐ion batteries.
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