Chlorine bridge bond-enabled binuclear copper complex for electrocatalyzing lithium–sulfur reactions

作者：Qin Yang, Jinyan Cai, Guanwu Li, Runhua Gao, Zhiyuan Han, Jingjing Han, Dong Liu, Lixian Song, Zixiong Shi, Dong Wang, Gongming Wang, Weitao Zheng, Guangmin Zhou, Yingze Song · 发表于：Nature Communications · 年份：2024 · DOI：10.1038/s41467-024-47565-1 · 被引用次数：143 · 研究领域：Advanced Battery Materials and Technologies、Advanced battery technologies research、Advancements in Battery Materials

Abstract Engineering atom-scale sites are crucial to the mitigation of polysulfide shuttle, promotion of sulfur redox, and regulation of lithium deposition in lithium–sulfur batteries. Herein, a homonuclear copper dual-atom catalyst with a proximal distance of 3.5 Å is developed for lithium–sulfur batteries, wherein two adjacent copper atoms are linked by a pair of symmetrical chlorine bridge bonds. Benefiting from the proximal copper atoms and their unique coordination, the copper dual-atom catalyst with the increased active interface concentration synchronously guide the evolutions of sulfur and lithium species. Such a delicate design breaks through the activity limitation of mononuclear metal center and represents a catalyst concept for lithium–sulfur battery realm. Therefore, a remarkable areal capacity of 7.8 mA h cm −2 is achieved under the scenario of sulfur content of 60 wt. %, mass loading of 7.7 mg cm −2 and electrolyte dosage of 4.8 μL mg −1 .