3D Hierarchical Porous Cu-Based Composite Current Collector with Enhanced Ligaments for Notably Improved Cycle Stability of Sn Anode in Li-Ion Batteries
By Luo, Zheng; Xu, Jincheng; Yuan, Bin; Hu, Renzong; Yang, Lichun; Gao, Yan; Zhu, Min
Published in ACS Applied Materials & Interfaces
Abstract
A 3D porous Cu current collector used in Li-ion batteries can improve the cycling performance of Sn anodes with high specific capacity because of the accommodation of large volume expansion by the pores. However, the pure Cu ligament is too soft to endure enough stress from volume expansion, and then it leads to the fast fade of capacity because of the formation of cracks or the collapse of the 3D porous structure. In this study, a novel micro-nano 3D hierarchical porous Cu-based composite current collector with enhanced ligaments has been fabricated by one-step dealloying of the Cu