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Design of a Metal–Organic Framework‐Derived Co 9 S 8 /S Material for Achieving High Durability and High Performance of Lithium–Sulfur Batteries
Author(s) -
Inamdar Arif I.,
Kaisar Nahid,
Kamal Saqib,
Luo TzuooTsair,
Jou Shyankay,
Chu ChihWei,
Chiang MingHsi,
Lu KuangLieh
Publication year - 2021
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202100418
Subject(s) - polysulfide , durability , materials science , separator (oil production) , cobalt , faraday efficiency , sulfur , porosity , chemical engineering , lithium–sulfur battery , sulfide , composite material , electrode , metallurgy , chemistry , electrolyte , physics , engineering , thermodynamics
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) Co 9 S 8 /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 Co 9 S 8 /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 Co 9 S 8 /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 Co 9 S 8 /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.