Biomimetic nacre-like aramid nanofiber-holey MXene composites for lithium-sulfur batteries

• DOI: 10.1016/j.xcrp.2023.101592
• Publication Date: 2023-09-22T14:30:35Z
• Authors: Yuying Wang; Volkan Cecen; Shoupeng Wang; Lei Zhao; Li Liu; Xiaonan Zhu; Yudong Huang; Mingqiang Wang
• Keywords: Polysulfide; Separator (oil production); Aramid

Polysulfide shuttle and lithium dendrite formation limit practical applications of lithium-sulfur (Li-S) batteries. To address these issues, we propose a nacre-inspired design MXene/aramid nanofiber (ANF) separator with "brick-and-mortar" microstructure. The combination shortened ion transfer distance generated by holes on MXene enlarged interlayer spacing provided ANFs creates hierarchical path "highway" that modulates the efficiency transportation while synergistically suppressing polysulfide shuttles. Furthermore, benefitting from introduction ANF, composite membrane has good mechanical properties impact tolerance. With simultaneous mitigation growth poisoning anodes, cells exhibited excellent rate capability to 5 C had possible long cycle life 3,500+ cycles capacity decay 0.013% per 3 C. This work offers strategy inspired structure pearl layers, aiming resolve materials performance challenges high-performance energy storage.