Single Zinc Atom Aggregates: Synergetic Interaction to Boost Fast Polysulfide Conversion in Lithium‐Sulfur Batteries

• DOI: 10.1002/adma.202208470
• Publication Date: 2022-12-05T17:25:00Z
• Authors: Xiaomin Zhang; Tingzhou Yang; Yongguang Zhang; Xingbo Wang; Jiayi Wang; Yebao Li; Aiping Yu; Xin Wang; Zhongwei Chen
• Keywords: Polysulfide; Carbon fibers; Lithium–sulfur battery

Single-atom catalysts (SACs) pave new possibilities to improve the utilization efficiency of sulfur electrodes arising from polysulfide shuttle effects and sluggish kinetics due their excellent applicability in atomic-scale reaction mechanisms structure-activity relationships. Herein, nitrogen (N)-anchored SACs on highly ordered N-doped carbon nanotube arrays are reported as host for fast redox conversion lithium-sulfur (Li-S) batteries. The cube structure aligned nanotubes can promote rapid mass transfer under high loadings, abundant single-atom active sites further accelerate lithium polysulfides (LiPSs). synergistic enhancement effect induced by adjacent single atoms with interatomic distances <1 nm accelerates multi-step at loadings. As a result, obtained Li-S batteries exhibit outstanding cycle stability areal capacity 5.6 mAh cm-2 after 100 cycles loading 7.2 mg (electrolyte ratio is ≈3.7 mL g-1 ). Even assembled into pouch cell, it still delivers 953.4 0.1 C, contributing development practically viable