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3D Porous Cu Current Collectors Derived by Hydrogen Bubble Dynamic Template for Enhanced Li Metal Anode Performance
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2019-03-20 , DOI: 10.1002/adfm.201808468
Hailong Qiu 1 , Tianyu Tang 1 , Muhammad Asif 1 , Xiaoxiao Huang 1 , Yanglong Hou 1
Affiliation  

Lithium (Li) metal is the most ideal anode material for high‐energy density batteries. However, the high activity of Li metal, the large volume change, and Li dendrite formation during cycling hinder its practical application. Herein, 3D porous Cu synthesized through a simple time‐saving hydrogen bubble dynamic template method is used as a host for the improved performance Li metal anode. Contrary to the planar Cu foil, the synthesized 3D porous structure can reduce the local current density, suppress the mossy/dendritic Li growth, and buffer the volume change in the Li metal anode. Highly stable Coulombic efficiency is achieved at different specific current densities (0.5, 1, and 2 mA cm−2) with a capacity of 1.0 mAh cm−2. Moreover, symmetrical Li|Li‐3D Cu cells show more stable cyclic performance with a lower overpotential even at a high current density of 3 mA cm−2.

中文翻译:

氢气泡动态模板衍生的3D多孔铜集电器,可增强锂金属阳极性能

锂(Li)金属是高能量密度电池最理想的负极材料。然而,锂金属的高活性,大的体积变化以及循环过程中锂枝晶的形成阻碍了其实际应用。在本文中,通过简单的省时的氢气泡动力学模板方法合成的3D多孔Cu被用作改善锂金属阳极性能的主体。与平面Cu箔相反,合成的3D多孔结构可以降低局部电流密度,抑制生苔/树突状Li的生长,并缓冲Li金属阳极中的体积变化。在不同的特定电流密度(0.5、1和2 mA cm -2)下实现了高度稳定的库仑效率,容量为1.0 mAh cm -2。此外,即使在3 mA cm -2的高电流密度下,对称的Li | Li-3D Cu电池也显示出更稳定的循环性能和较低的过电位。
更新日期:2019-03-20
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