基于磷酸三乙酯电解质的高可逆性和可充电安全锌电池。
Highly Reversible and Rechargeable Safe Zn Batteries Based on a Triethyl Phosphate Electrolyte.
作者信息
Naveed Ahmad, Yang Huijun, Yang Jun, Nuli Yanna, Wang Jiulin
机构信息
Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
出版信息
Angew Chem Int Ed Engl. 2019 Feb 25;58(9):2760-2764. doi: 10.1002/anie.201813223. Epub 2019 Jan 25.
Zinc metal is an attractive anode material for next-generation batteries. However, dendrite growth and limited Coulombic efficiency (CE) during cycling are the major roadblocks towards the widespread commercialization of batteries employing Zn anodes. In this work we report the novel adoption of triethyl phosphate (TEP) as a solvent and co-solvent with aqueous electrolytes to obtain a highly stable and dendrite-free Zn anode. Stable Zn plating/stripping for over 3000 h was obtained, accompanied by a CE of 99.68 %. SEM images of the Zn anodes revealed highly porous interconnected dendrite-free Zn deposits. The electrolyte displayed good compatibility with both Zn anodes and potassium copper hexacyanoferrate (KCuHCf) cathodes for Zn ion batteries (ZIBs). The full cell showed a long cycling stability and high rate capability. The present work is a contribution towards cost-effective and safe battery systems.
锌金属是下一代电池颇具吸引力的负极材料。然而，循环过程中的枝晶生长和有限的库仑效率（CE）是采用锌负极的电池广泛商业化的主要障碍。在这项工作中，我们报告了一种新颖的方法，即采用磷酸三乙酯（TEP）作为溶剂并与水性电解质共溶，以获得高度稳定且无枝晶的锌负极。实现了超过3000小时的稳定锌电镀/剥离，同时库仑效率为99.68%。锌负极的扫描电子显微镜图像显示出高度多孔的相互连接的无枝晶锌沉积物。该电解质与锌离子电池（ZIB）中的锌负极和六氰合铁酸铜钾（KCuHCf）正极均显示出良好的兼容性。全电池表现出长循环稳定性和高倍率性能。目前的工作为具有成本效益和安全性的电池系统做出了贡献。
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