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Stable Aqueous Anode-Free Zinc Batteries Enabled by Interfacial Engineering
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2021-05-07 , DOI: 10.1002/adfm.202101886 Yongling An 1 , Yuan Tian 1 , Kai Zhang 1 , Yongpeng Liu 1 , Chengkai Liu 1 , Shenglin Xiong 2 , Jinkui Feng 1 , Yitai Qian 3
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2021-05-07 , DOI: 10.1002/adfm.202101886 Yongling An 1 , Yuan Tian 1 , Kai Zhang 1 , Yongpeng Liu 1 , Chengkai Liu 1 , Shenglin Xiong 2 , Jinkui Feng 1 , Yitai Qian 3
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Anode-free zinc batteries (AFZBs) are proposed as promising energy storage systems due to their high energy density, inherent safety, low cost, and simplified fabrication process. However, rapid capacity fading caused by the side reactions between the in situ formed zinc metal anode and electrolyte hinders their practical applications. To address these issues, aqueous AFZBs enabled by electrolyte engineering to form a stable interphase are designed. By introducing a multifunctional zinc fluoride (ZnF2) additive into the electrolyte, a stable F-rich interfacial layer is formed. This interfacial layer can not only regulate the growth orientation of zinc crystals, but also serve as an inert protection layer against side reactions such as H2 generation. Based on these synergy effects, zinc deposition/dissolution with high reversibility (Coulombic efficiency > 99.87%) and stable cycling performance up to 600 h of are achieved in the electrolyte optimized by ZnF2. With this electrolyte, the cycling life of AFZBs is significantly improved. The work may initiate the research of AFZBs and be useful for the design of high energy, high safety, and low-cost power sources.
中文翻译：
通过界面工程实现稳定的水性无阳极锌电池
无阳极锌电池（AFZBs）因其高能量密度、固有安全性、低成本和简化的制造工艺而被提议为有前景的储能系统。然而，原位形成的锌金属负极与电解质之间的副反应引起的快速容量衰减阻碍了它们的实际应用。为了解决这些问题，设计了通过电解质工程形成稳定界面的水性 AFZB。通过将多功能氟化锌 (ZnF 2 ) 添加剂引入电解质中，形成了稳定的富 F 界面层。该界面层不仅可以调节锌晶体的生长取向，还可以作为惰性保护层，防止 H 2等副反应一代。基于这些协同效应，在ZnF 2优化的电解液中实现了具有高可逆性（库仑效率> 99.87%）和稳定循环性能长达600 h 的锌沉积/溶解。使用这种电解液，AFZBs 的循环寿命显着提高。该工作可能会启动 AFZB 的研究，并有助于设计高能量、高安全性和低成本的电源。
更新日期：2021-06-24
中文翻译：
通过界面工程实现稳定的水性无阳极锌电池
无阳极锌电池（AFZBs）因其高能量密度、固有安全性、低成本和简化的制造工艺而被提议为有前景的储能系统。然而，原位形成的锌金属负极与电解质之间的副反应引起的快速容量衰减阻碍了它们的实际应用。为了解决这些问题，设计了通过电解质工程形成稳定界面的水性 AFZB。通过将多功能氟化锌 (ZnF 2 ) 添加剂引入电解质中，形成了稳定的富 F 界面层。该界面层不仅可以调节锌晶体的生长取向，还可以作为惰性保护层，防止 H 2等副反应一代。基于这些协同效应，在ZnF 2优化的电解液中实现了具有高可逆性（库仑效率> 99.87%）和稳定循环性能长达600 h 的锌沉积/溶解。使用这种电解液，AFZBs 的循环寿命显着提高。该工作可能会启动 AFZB 的研究，并有助于设计高能量、高安全性和低成本的电源。
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