TY  - JOUR
A1  - Xie, Dongjiu
A1  - Mei, Shilin
A1  - Xu, Yaolin
A1  - Quan, Ting
A1  - Haerk, Eneli
A1  - Kochovski, Zdravko
A1  - Lu, Yan
T1  - Efficient sulfur host based on yolk-shell iron oxide/sulfide-carbon nanospindles for lithium-sulfur batteries
JF  - ChemSusChem : chemistry, sustainability, energy, materials
N2  - 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 (Fe3O4, FeS, or FeS2), 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/FeS2-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.
KW  - batteries
KW  - electrode materials
KW  - lithium sulfides
KW  - yolk-shell
KW  - nanostructures
Y1  - 2021
U6  - https://doi.org/10.1002/cssc.202002731
SN  - 1864-5631
SN  - 1864-564X
VL  - 14
IS  - 5
SP  - 1404
EP  - 1413
PB  - Wiley-VCH
CY  - Weinheim
ER  -