双功能亲疏锌界面层实现高稳定锌金属阳极

IF 6.4 1区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Frontiers Pub Date : 2025-08-22 DOI:10.1039/d5qi01396h

Yujuan Pu, Youkui Zhang, Xiaoyong Yang, Kaiyuan Zhan, Qiwen Zhang, Tao Qin, Xuzhong Zeng, Lidan Niu, Wenjing Yang, Yunhuai Zhang, Xueming Li

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引用次数: 0

摘要

水性锌离子电池（azib）由于其固有的安全性和低成本的优点，作为下一代储能系统具有巨大的潜力。然而，不受抑制的枝晶生长和不可忽视的水诱导副反应可能对锌阳极的稳定性和azib的商业开发造成致命的影响。在此，我们构建了一个双功能的亲锌-疏水界面层（STA-ZnO层）来获得一个稳定的锌阳极。暴露在外的疏水烷基链可以排斥水到达锌箔表面，有效缓解HER和腐蚀副反应。同时，亲锌ZnO保证STA-ZnO@Zn阳极加速Zn2+沉积，抑制Zn枝晶生长。得益于这些优点，基于STA-ZnO@Zn阳极的对称电池在1ma cm - 2和5ma cm - 2的1mah cm - 2下分别提供了4900小时和4000小时的长期循环稳定性。令人鼓舞的是，STA-ZnO@Zn阳极也显示出99.81%（2000次循环）的高平均CE。为实现azib的实际应用，提出了一种可行的保护Zn阳极的策略。

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Dual-functional Zincophilic-Hydrophobic Interfacial Layer Enables Highly Stable Zn Metal Anodes

Aqueous Zn-ion batteries (AZIBs) deliver eminent potential as next-generation energy storage systems due to the attractive merits of inherent safety and low cost. However, uncurbed dendrite growth and non-negligible water-induced side reactions could be fatal to the stability of Zn anode and commercial development of AZIBs. Herein, we construct a bifunctional zincophilic-hydrophobic interfacial layer (STA-ZnO layer) for attaining a stable Zn anode. The exposed hydrophobic alkyl chain can repel H2O to reach the Zn foil surface, efficaciously alleviating the HER and corrosion side reaction. Meanwhile, the zincophilic ZnO ensures that STA-ZnO@Zn anode accelerates Zn2+ deposition and constrains the growth of Zn dendrite. Benefitting from these advantages, symmetric cells based on STA-ZnO@Zn anode deliver long-term cycling stability over 4900 h and 4000 h at 1 mA cm−2 and 5 mA cm−2 for 1 mAh cm−2, respectively. Encouragingly, STA-ZnO@Zn anode also exhibits a high average CE of 99.81% (2000 cycles). This work develops a feasible strategy to protect Zn anode for achieving practical application of AZIBs.

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