Design of a Metal–Organic Framework‐Derived Co9S8/S Material for Achieving High Durability and High Performance of Lithium–Sulfur Batteries. Issue 16 (17th June 2021)

• Record Type: Journal Article
• Authors: Inamdar, Arif I.; Kaisar, Nahid; Kamal, Saqib; Luo, Tzuoo‐Tsair; Jou, Shyankay; Chu, Chih‐Wei; Chiang, Ming‐Hsi; Lu, Kuang‐Lieh
• Is Part Of: ChemElectroChem. Volume 8:Issue 16(2021)
• Page Start: 3040
• Page End: 3048
• Publication Date: 2021-06-17
• Subjects: Celgard -- energy -- lithium–sulfur batteries -- metal–organic frameworks -- polysulfide; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.202100418
• Languages: English
• ISSNs: 2196-0216

Abstract

Abstract: Enhancing the durability and performance of high‐energy‐density lithium–sulfur batteries (LSBs) is of paramount important for energy storage. We have fabricated a metal–organic framework‐derived (MOF) Co9 S8 /S (cobalt sulfide/sulfur) modified separator in LSBs which displays highest durability and excellent performance. The material successfully suppresses polysulfide shuttling, which is a determining factor in the deterioration of performance and lifetime of a battery. The Co9 S8 /S material is derived from a Co‐MOF. Its porosity and structural features make it an efficient material for capturing lithium polysulfides (LiPS), which is involved in chemical interactions with polarities within Co9 S8 /S. The kinetics of redox reactions involving LiPS are facilitated by the conductive properties of the material. A prolonged cycle life of 2000 charge–discharge cycles at a 1 C‐rate is observed when Co9 S8 /S is applied to the surface of a separator in the LSBs. An excellent discharge capacity of 879 mAh g −1 with the coulombic efficiency being maintained above 85 % throughout the course of 2000 charge–discharge cycles at a 1 C‐rate is achieved. Our strategy results in a material with unpresented high stability and durability of a MOF‐derived material which have fundamental importance in industrial and future commercialization of LSBs. Abstract : The cycle life and performance of a lithium–sulfur battery was prolonged after integration of a metal–organic framework‐derived Co9 S8 /S separator in the cell.