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In situ construction of a static-dynamic hybrid interface toward stable Zn anodes for aqueous Zn-ion batteries
Chemical Science ( IF 7.6 ) Pub Date : 2024-09-06 , DOI: 10.1039/d4sc05127k Baohua Liu 1 , Luyan Yu 1 , Qinghua Xiao 1 , Shilin Zhang 2 , Guanjie Li 2 , Kaixin Ren 1 , Yuxuan Zhu 1 , Chao Wang 1 , Qinghong Wang 1
Chemical Science ( IF 7.6 ) Pub Date : 2024-09-06 , DOI: 10.1039/d4sc05127k Baohua Liu 1 , Luyan Yu 1 , Qinghua Xiao 1 , Shilin Zhang 2 , Guanjie Li 2 , Kaixin Ren 1 , Yuxuan Zhu 1 , Chao Wang 1 , Qinghong Wang 1
Affiliation
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Aqueous Zn-ion batteries are promising candidates for next-generation energy storage devices due to the advantages of high safety, low cost and good environmental friendliness. However, the uncontrollable dendrite growth and undesirable side reactions occurring on the Zn anode result in poor cycling stability. Herein, a Lewis base, triethanolamine, is used as the electrolyte additive to construct a hybrid solid-electrolyte interphase layer composed of a static ZnSO4·3Zn(OH)2·4H2O layer and dynamic quaternary ammonium ion adsorption layer. The static SEI layer acts as a physical barrier between the Zn anode and electrolyte, thus effectively suppressing chemical corrosion and the hydrogen evolution reaction. The dynamic layer can not only regulate the ion flux at the interface, but also promote the de-solvation of solvated Zn2+, thus leading to homogenous Zn deposition along the (002) electro-crystallization orientation. As a result, the Zn anode demonstrates an extended cycle life of 2500 h at a current density of 1.0 mA cm−2, with an areal capacity of 1.0 mA h cm−2 and a high coulombic efficiency (CE) of 98.94%. The Zn‖V2O5 cells exhibit a specific capacity of 178.4 mA h g−1 after 500 cycles, indicating both high capacity and robust cycling stability, which are essential for practical applications.
中文翻译：
原位构建水系锌离子电池稳定锌阳极的静态-动态混合界面
水系锌离子电池具有安全性高、成本低、环境友好等优点，是下一代储能装置的有希望的候选者。然而，锌负极上发生的不可控的枝晶生长和不良副反应导致循环稳定性差。在此，采用路易斯碱三乙醇胺作为电解质添加剂，构建了由静态ZnSO 4 ·3Zn(OH) 2 ·4H 2 O层和动态季铵离子吸附层组成的杂化固体电解质中间相层。静态SEI层充当锌阳极和电解液之间的物理屏障，从而有效抑制化学腐蚀和析氢反应。动态层不仅可以调节界面处的离子通量，还可以促进溶剂化Zn 2+的去溶剂化，从而导致沿（002）电结晶方向均匀的Zn沉积。结果表明，该锌负极在1.0 mA cm -2的电流密度下具有2500 h的延长循环寿命，面积容量为1.0 mA h cm -2 ，库仑效率（CE）高达98.94%。 Zn‖V 2 O 5电池在500次循环后表现出178.4 mA hg -1的比容量，表明高容量和强大的循环稳定性，这对于实际应用至关重要。
更新日期：2024-09-06
中文翻译：
原位构建水系锌离子电池稳定锌阳极的静态-动态混合界面
水系锌离子电池具有安全性高、成本低、环境友好等优点，是下一代储能装置的有希望的候选者。然而，锌负极上发生的不可控的枝晶生长和不良副反应导致循环稳定性差。在此，采用路易斯碱三乙醇胺作为电解质添加剂，构建了由静态ZnSO 4 ·3Zn(OH) 2 ·4H 2 O层和动态季铵离子吸附层组成的杂化固体电解质中间相层。静态SEI层充当锌阳极和电解液之间的物理屏障，从而有效抑制化学腐蚀和析氢反应。动态层不仅可以调节界面处的离子通量，还可以促进溶剂化Zn 2+的去溶剂化，从而导致沿（002）电结晶方向均匀的Zn沉积。结果表明，该锌负极在1.0 mA cm -2的电流密度下具有2500 h的延长循环寿命，面积容量为1.0 mA h cm -2 ，库仑效率（CE）高达98.94%。 Zn‖V 2 O 5电池在500次循环后表现出178.4 mA hg -1的比容量，表明高容量和强大的循环稳定性，这对于实际应用至关重要。
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