Engineering Laboratory for the Next Generation Power and Energy Storage Batteries, Graduate School at Shenzhen , Tsinghua University , Shenzhen 518055 , P. R. China.
Laboratory of Advanced Materials, School of Materials Science and Engineering , Tsinghua University , Beijing 100084 , P. R. China.
ACS Appl Mater Interfaces. 2018 Jun 20;10(24):20244-20249. doi: 10.1021/acsami.8b04881. Epub 2018 Jun 8.
Porous current collectors are conducive to enhance the property of Li metal anode. Unfortunately, congestion in diffusion path during plating process damages the effects of current collectors. Herein, we developed a 3D Cu skeleton with open micrometer-sized pores by NaCl-assisted powder-sintering method. The unobstructed pores of 3D Cu skeleton help to reduce congestion during plating, thus most of Li deposited inside the current collector. Besides, the large smooth surface promotes the deposition of Li with smooth spherical shape, which mitigating Li dendrite growth. As a result, better safety and rechargeability of Li metal anode were achieved in this design.
多孔集流器有利于增强锂金属阳极的性能。然而，电镀过程中扩散路径的堵塞会破坏集流器的效果。在此，我们采用 NaCl 辅助粉末烧结法开发了一种具有开放微米级孔的 3D Cu 骨架。3D Cu 骨架的畅通无阻的孔有助于减少电镀过程中的堵塞，从而使大部分 Li 沉积在集流器内部。此外，较大的光滑表面促进了 Li 的沉积，形成光滑的球形，从而缓解了 Li 枝晶的生长。因此，这种设计提高了锂金属阳极的安全性和可再充电性。
