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Okra-Like Fe7 S8 /C@ZnS/N-C@C with Core-Double-Shelled Structures as Robust and High-Rate Sodium Anode.
Small. 2020 Sep; 16(35):e1907641.S

Abstract

Core-multishelled structures with controlled chemical composition have attracted great interest due to their fascinating electrochemical performance. Herein, a metal-organic framework (MOF)-on-MOF self-templated strategy is used to fabricate okra-like bimetal sulfide (Fe7 S8 /C@ZnS/N-C@C) with core-double-shelled structure, in which Fe7 S8 /C is distributed in the cores, and ZnS is embedded in one of the layers. The MOF-on-MOF precursor with an MIL-53 core, a ZIF-8 shell, and a resorcinol-formaldehyde (RF) layer (MIL-53@ZIF-8@RF) is prepared through a layer-by-layer assembly method. After calcination with sulfur powder, the resultant structure has a hierarchical carbon matrix, abundant internal interface, and tiered active material distribution. It provides fast sodium-ion reaction kinetics, a superior pseudocapacitance contribution, good resistance of volume changes, and stepwise sodiation/desodiation reaction mechanism. As an anode material for sodium-ion batteries, the electrochemical performance of Fe7 S8 /C@ZnS/N-C@C is superior to that of Fe7 S8 /C@ZnS/N-C, Fe7 S8 /C, or ZnS/N-C. It delivers a high and stable capacity of 364.7 mAh g-1 at current density of 5.0 A g-1 with 10 000 cycles, and registers only 0.00135% capacity decay per cycle. This MOF-on-MOF self-templated strategy may provide a method to construct core-multishelled structures with controlled component distributions for the energy conversion and storage.

Authors+Show Affiliations

School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao, Shandong, 266580, P. R. China.School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao, Shandong, 266580, P. R. China.College of Chemical Engineering, China University of Petroleum (East China), Qingdao, Shandong, 266580, P. R. China.College of Chemical Engineering, China University of Petroleum (East China), Qingdao, Shandong, 266580, P. R. China.School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao, Shandong, 266580, P. R. China.School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao, Shandong, 266580, P. R. China.School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao, Shandong, 266580, P. R. China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32734690

Citation

Cao, Dongwei, et al. "Okra-Like Fe7 S8 /C@ZnS/N-C@C With Core-Double-Shelled Structures as Robust and High-Rate Sodium Anode." Small (Weinheim an Der Bergstrasse, Germany), vol. 16, no. 35, 2020, pp. e1907641.
Cao D, Kang W, Wang W, et al. Okra-Like Fe7 S8 /C@ZnS/N-C@C with Core-Double-Shelled Structures as Robust and High-Rate Sodium Anode. Small. 2020;16(35):e1907641.
Cao, D., Kang, W., Wang, W., Sun, K., Wang, Y., Ma, P., & Sun, D. (2020). Okra-Like Fe7 S8 /C@ZnS/N-C@C with Core-Double-Shelled Structures as Robust and High-Rate Sodium Anode. Small (Weinheim an Der Bergstrasse, Germany), 16(35), e1907641. https://doi.org/10.1002/smll.201907641
Cao D, et al. Okra-Like Fe7 S8 /C@ZnS/N-C@C With Core-Double-Shelled Structures as Robust and High-Rate Sodium Anode. Small. 2020;16(35):e1907641. PubMed PMID: 32734690.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Okra-Like Fe7 S8 /C@ZnS/N-C@C with Core-Double-Shelled Structures as Robust and High-Rate Sodium Anode. AU - Cao,Dongwei, AU - Kang,Wenpei, AU - Wang,Wenhong, AU - Sun,Kaian, AU - Wang,Yuyu, AU - Ma,Ping, AU - Sun,Daofeng, Y1 - 2020/07/30/ PY - 2019/12/27/received PY - 2020/06/09/revised PY - 2020/8/1/pubmed PY - 2020/8/1/medline PY - 2020/8/1/entrez KW - MOF-on-MOF KW - anode KW - bimetal sulfide KW - hybrid core-shelled structure KW - sodium-ion batteries SP - e1907641 EP - e1907641 JF - Small (Weinheim an der Bergstrasse, Germany) JO - Small VL - 16 IS - 35 N2 - Core-multishelled structures with controlled chemical composition have attracted great interest due to their fascinating electrochemical performance. Herein, a metal-organic framework (MOF)-on-MOF self-templated strategy is used to fabricate okra-like bimetal sulfide (Fe7 S8 /C@ZnS/N-C@C) with core-double-shelled structure, in which Fe7 S8 /C is distributed in the cores, and ZnS is embedded in one of the layers. The MOF-on-MOF precursor with an MIL-53 core, a ZIF-8 shell, and a resorcinol-formaldehyde (RF) layer (MIL-53@ZIF-8@RF) is prepared through a layer-by-layer assembly method. After calcination with sulfur powder, the resultant structure has a hierarchical carbon matrix, abundant internal interface, and tiered active material distribution. It provides fast sodium-ion reaction kinetics, a superior pseudocapacitance contribution, good resistance of volume changes, and stepwise sodiation/desodiation reaction mechanism. As an anode material for sodium-ion batteries, the electrochemical performance of Fe7 S8 /C@ZnS/N-C@C is superior to that of Fe7 S8 /C@ZnS/N-C, Fe7 S8 /C, or ZnS/N-C. It delivers a high and stable capacity of 364.7 mAh g-1 at current density of 5.0 A g-1 with 10 000 cycles, and registers only 0.00135% capacity decay per cycle. This MOF-on-MOF self-templated strategy may provide a method to construct core-multishelled structures with controlled component distributions for the energy conversion and storage. SN - 1613-6829 UR - https://www.unboundmedicine.com/medline/citation/32734690/Okra_Like_Fe7_S8_/C@ZnS/N_C@C_with_Core_Double_Shelled_Structures_as_Robust_and_High_Rate_Sodium_Anode_ L2 - https://doi.org/10.1002/smll.201907641 DB - PRIME DP - Unbound Medicine ER -
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