TY - JOUR
T1 - Rational design of MOFs-derived Fe3O4@C interwoven with carbon nanotubes as sulfur host for advanced lithium‑sulfur batteries
AU - Yuan, Meng
AU - Zhao, Yan
AU - Sun, Zhenghao
AU - Bakenov, Zhumabay
N1 - Funding Information:
This work was supported by the Natural Science Foundation of Hebei Province of China (Grant No. B2019202277); the Research Grants #091019CRP2114 and #110119FD4504 from Nazarbayev University.
Funding Information:
This work was supported by the Natural Science Foundation of Hebei Province of China (Grant No. B2019202277); the Research Grants #091019CRP2114 and #110119FD4504 from Nazarbayev University. CRediT author statement. Meng Yuan: Conceptualization, Formal analysis, Investigation, Writing - original draft. Yan Zhao: Funding acquisition, Project administration, Writing - review & editing. Zhenghao Sun: Data curation, Formal analysis, Writing - review & editing. Zhumabay Bakenov: Writing - review & editing. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
PY - 2020/11/15
Y1 - 2020/11/15
N2 - The practical implementation of lithium‑sulfur (Li[sbnd]S) batteries has been hindered by limited power density and slow electrochemical reaction kinetics resulted from the shuttle effect of soluble polysulfides. Conventional carbonaceous materials are difficult to effectively adsorb polysulfides, and polar metal oxides are expected to adsorb polysulfides through strong interactions and promote electrochemical conversion. In this work, carbon nanotubes/MIL-88B microspheres were obtained by simple spray-drying, subsequently, carbon nanotubes/Fe3O4@C (CNT/Fe3O4@C) composites were obtained by high-temperature calcination, and Fe3O4@C nanorods was derived from MIL-88B. The interwoven CNT network forms a three-dimensional conductive path, which ensures that the sulfur cathode has excellent conductivity. The polar Fe3O4 nanoparticles are covered by carbon layer, which not only adsorb polysulfides through strong interaction, but also serve as a catalyst to improve the kinetics of chemical reactions. Benefiting from these characteristics, the CNT/Fe3O4@C composite is considered to be an excellent sulfur host, Li[sbnd]S batteries exhibit superior cyclability performance (with 0.062% decay per cycle at 1.5C), exceptional rate performance (674 mAh g−1 at 3C), and high area capacity (4.1 mAh cm−2 at 0.2C).
AB - The practical implementation of lithium‑sulfur (Li[sbnd]S) batteries has been hindered by limited power density and slow electrochemical reaction kinetics resulted from the shuttle effect of soluble polysulfides. Conventional carbonaceous materials are difficult to effectively adsorb polysulfides, and polar metal oxides are expected to adsorb polysulfides through strong interactions and promote electrochemical conversion. In this work, carbon nanotubes/MIL-88B microspheres were obtained by simple spray-drying, subsequently, carbon nanotubes/Fe3O4@C (CNT/Fe3O4@C) composites were obtained by high-temperature calcination, and Fe3O4@C nanorods was derived from MIL-88B. The interwoven CNT network forms a three-dimensional conductive path, which ensures that the sulfur cathode has excellent conductivity. The polar Fe3O4 nanoparticles are covered by carbon layer, which not only adsorb polysulfides through strong interaction, but also serve as a catalyst to improve the kinetics of chemical reactions. Benefiting from these characteristics, the CNT/Fe3O4@C composite is considered to be an excellent sulfur host, Li[sbnd]S batteries exhibit superior cyclability performance (with 0.062% decay per cycle at 1.5C), exceptional rate performance (674 mAh g−1 at 3C), and high area capacity (4.1 mAh cm−2 at 0.2C).
KW - FeO
KW - Lithium‑sulfur batteries
KW - MIL-88B
KW - Polysulfides
KW - Spray-drying
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U2 - 10.1016/j.jelechem.2020.114608
DO - 10.1016/j.jelechem.2020.114608
M3 - Article
AN - SCOPUS:85090717122
VL - 877
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
SN - 1572-6657
M1 - 114608
ER -