Suppressed Water Reactivity by Zincophilic-Hydrophobic Electrolyte Additive for Superior Aqueous Zn Metal Batteries,Advanced Energy Materials

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Suppressed Water Reactivity by Zincophilic-Hydrophobic Electrolyte Additive for Superior Aqueous Zn Metal Batteries
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2023-10-02 , DOI: 10.1002/aenm.202302707
Yahui Wang _{1,

2} , Ran Zhao ₁ , Mingquan Liu _{1,

2} , Jingjing Yang ₁ , Anqi Zhang ₁ , Jiasheng Yue ₁ , Chuan Wu _{1,

2} , Ying Bai _{1,

2}

Affiliation

As one of the most promising anodes of aqueous batteries, Zn metal faces uncontrollable side reactions and deleterious dendrite growth, which drastically compromise its cycle life and Coulombic efficiency (CE). To tackle these issues, a versatile electrolyte additive is reported that can regulate the solvation structure, adsorb on the Zn surface, and in situ generate a novel zincophilic-microhydrophobic interphase to isolate the anode from the reactive water molecules. Benefiting from its triple effects on the water reactivity modulation, the Zn metal anode exhibits excellent reversibility with an ultra-high average CE value of 99.92% at 5 mA cm⁻² in the ZnSO₄ electrolyte system, and the Zn||Zn symmetric cell with ethanesulfonamide additive achieves a long lifespan over 6000 h. The merits of ESA additives are further displayed in the Zn//MnO₂ full cells and Zn ion hybrid capacitors, exhibiting excellent capacity retention of 81.60% at 5 C over 1000 cycles, and a 92.25% capacity retention over 50 000 cycles at 5 A g⁻¹, respectively. What's more, the full cells exhibit outstanding stability of 100% capacity retention after 120 cycles at 0.1 C. This strategy shows a promising alternative for the further development of aqueous Zn metal batteries with low-cost ZnSO₄-based electrolytes.

中文翻译：

通过亲锌疏水电解质添加剂抑制水反应性以制备优质水性锌金属电池

作为水系电池最有前途的阳极之一，锌金属面临着不可控的副反应和有害的枝晶生长，这极大地损害了其循环寿命和库仑效率（CE）。为了解决这些问题，据报道，一种多功能电解质添加剂可以调节溶剂化结构，吸附在锌表面，并原位生成新型亲锌-微疏水界面，以将阳极与反应性水分子隔离。得益于其对水反应性调节的三重作用，Zn金属阳极在ZnSO ₄电解质体系中表现出优异的可逆性，在5 mA cm ^-2下具有高达99.92%的平均CE值，并且Zn||Zn对称电池配合乙磺酰胺添加剂，使用寿命可达6000小时以上。ESA添加剂的优点在Zn//MnO ₂全电池和锌离子混合电容器中得到了进一步的体现，在5 C下1000次循环中表现出81.60%的优异容量保持率，在5 A 50 000次循环中显示出92.25%的容量保持率分别为g ^-1。此外，全电池在 0.1 C 下循环 120 次后表现出 100% 容量保持的出色稳定性。该策略为进一步开发具有低成本 ZnSO 4 基电解质的水性锌金属电池提供了一种有前景的替代_方案。

更新日期：2023-10-02

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