Premium
Efficient Sulfur Host Based on Yolk‐Shell Iron Oxide/Sulfide‐Carbon Nanospindles for Lithium‐Sulfur Batteries
Author(s) -
Xie Dongjiu,
Mei Shilin,
Xu Yaolin,
Quan Ting,
Härk Eneli,
Kochovski Zdravko,
Lu Yan
Publication year - 2021
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.202002731
Subject(s) - sulfur , sulfide , lithium (medication) , materials science , electrochemistry , carbon fibers , oxide , polysulfide , chemical engineering , iron sulfide , nanotechnology , electrode , chemistry , metallurgy , composite material , composite number , medicine , electrolyte , engineering , endocrinology
Numerous nanostructured materials have been reported as efficient sulfur hosts to suppress the problematic “shuttling” of lithium polysulfides (LiPSs) in lithium‐sulfur (Li−S) batteries. However, direct comparison of these materials in their efficiency of suppressing LiPSs shuttling is challenging, owing to the structural and morphological differences between individual materials. This study introduces a simple route to synthesize a series of sulfur host materials with the same yolk‐shell nanospindle morphology but tunable compositions (Fe 3 O 4 , FeS, or FeS 2 ), which allows for a systematic investigation into the specific effect of chemical composition on the electrochemical performances of Li−S batteries. Among them, the S/FeS 2 −C electrode exhibits the best performance and delivers an initial capacity of 877.6 mAh g −1 at 0.5 C with a retention ratio of 86.7 % after 350 cycles. This approach can also be extended to the optimization of materials for other functionalities and applications.