Construction of Electrocatalytic and Heat-Resistant Self-Supporting Electrodes for High-Performance Lithium–Sulfur Batteries

• DOI: 10.1007/s40820-019-0313-x
• Publication Date: 2019-09-18T07:02:46Z
• Authors: Xuemei Zhang; Yunhong Wei; Boya Wang; Mei Wang; Yun Zhang; Qian Wang; Hao Wu
• Keywords: Polysulfide; Chemisorption

Abstract Boosting the utilization efficiency of sulfur electrodes and suppressing “shuttle effect” intermediate polysulfides remain critical challenge for high-performance lithium–sulfur batteries (LSBs). However, most reported are not competent to realize fast conversion into insoluble lithium sulfides when applied with high loading, as well mitigate more serious shuttle effect polysulfides, especially worked at an elevated temperature. Herein, we a unique structural engineering strategy crafting hierarchical multifunctional electrode architecture constructed by rooting MOF-derived CoS 2 /carbon nanoleaf arrays (CoS –CNA) nitrogen-rich 3D conductive scaffold (CTNF@CoS LSBs. An accelerated electrocatalytic improved polysulfide redox kinetics arising from –CNA were investigated. Besides, strong capillarity chemisorption CTNF@CoS enable loading efficient sulfur, thus leading LIBs performed only room temperature but also up (55 °C). Even ultrahigh 7.19 mg cm −2 , –CNA/S cathode still exhibits rate capacity 55 °C.