Beijing Key Laboratory of Green Chemical, Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China.
Advanced Research Institute for Multidisciplinary Science, Beijing Institute of Technology, Beijing, 100081, P. R. China.
Angew Chem Int Ed Engl. 2017 Nov 6;56(45):14207-14211. doi: 10.1002/anie.201707093. Epub 2017 Sep 21.
The rechargeable lithium metal anode is of utmost importance for high-energy-density batteries. Regulating the deposition/dissolution characteristics of Li metal is critical in both fundamental researches and practical applications. In contrast to gray Li deposits featured with dendritic and mossy morphologies, columnar and uniform Li is herein plated on lithium-fluoride (LiF)-protected copper (Cu) current collectors. The electrochemical properties strongly depended on the microscale morphologies of deposited Li, which were further embodied as macroscale colors. The as-obtained ultrathin and columnar Li anodes contributed to stable cycling in working batteries with a dendrite-free feature. This work deepens the fundamental understanding of the role of LiF in the nucleation/growth of Li and provides emerging approaches to stabilize rechargeable Li metal anodes.
对于高能量密度电池而言，可再充电的锂金属阳极极其重要。调节锂金属的沉积/溶解特性在基础研究和实际应用中都至关重要。与具有枝晶和苔藓状形态的灰色 Li 沉积物不同，在此将柱状且均匀的 Li 电镀在氟化锂 (LiF) 保护的铜 (Cu) 集电器上。电化学性能强烈依赖于沉积 Li 的微尺度形态，这进一步体现在宏观尺度的颜色上。所获得的超薄柱状 Li 阳极有助于在具有无枝晶特征的工作电池中实现稳定的循环。这项工作深化了对 LiF 在 Li 的成核/生长中的作用的基本认识，并为稳定可再充电 Li 金属阳极提供了新的方法。
