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Surface Modification of Fe7 S8 /C Anode via Ultrathin Amorphous TiO2 Layer for Enhanced Sodium Storage Performance.
Small. 2020 May; 16(20):e2000745.S

Abstract

Iron sulfides with high theoretical capacity and low cost have attracted extensive attention as anode materials for sodium ion batteries. However, the inferior electrical conductivity and devastating volume change and interface instability have largely hindered their practical electrochemical properties. Here, ultrathin amorphous TiO2 layer is constructed on the surface of a metal-organic framework derived porous Fe7 S8 /C electrode via a facile atomic layer deposition strategy. By virtue of the porous structure and enhanced conductivity of the Fe7 S8 /C, the electroactive TiO2 layer is expected to effectively improve the electrode interface stability and structure integrity of the electrode. As a result, the TiO2 -modified Fe7 S8 /C anode exhibits significant performance improvement for sodium-ion batteries. The optimal TiO2 -modified Fe7 S8 /C electrode delivers reversible capacity of 423.3 mA h g-1 after 200 cycles with high capacity retention of 75.3% at 0.2 C. Meanwhile, the TiO2 coating is conducive to construct favorable solid electrolyte interphase, leading to much enhanced initial Coulombic efficiency from 66.9% to 72.3%. The remarkable improvement suggests that the interphase modification holds great promise for high-performance metal sulfide-based anode materials for sodium-ion batteries.

Authors+Show Affiliations

Engineering Research Center of Organosilicon Compounds and Materials of Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China.Engineering Research Center of Organosilicon Compounds and Materials of Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China.Engineering Research Center of Organosilicon Compounds and Materials of Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China.Institute for Superconducting and Electronic Materials, Innovation Campus, University of Wollongong, Wollongong, NSW, 2500, Australia.National Engineering Research Center of Advanced Energy Storage Materials, Hunan, 410205, China.Engineering Research Center of Organosilicon Compounds and Materials of Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China.Engineering Research Center of Organosilicon Compounds and Materials of Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China.Engineering Research Center of Organosilicon Compounds and Materials of Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32329571

Citation

Deng, Xianchun, et al. "Surface Modification of Fe7 S8 /C Anode Via Ultrathin Amorphous TiO2 Layer for Enhanced Sodium Storage Performance." Small (Weinheim an Der Bergstrasse, Germany), vol. 16, no. 20, 2020, pp. e2000745.
Deng X, Chen H, Wu X, et al. Surface Modification of Fe7 S8 /C Anode via Ultrathin Amorphous TiO2 Layer for Enhanced Sodium Storage Performance. Small. 2020;16(20):e2000745.
Deng, X., Chen, H., Wu, X., Wang, Y. X., Zhong, F., Ai, X., Yang, H., & Cao, Y. (2020). Surface Modification of Fe7 S8 /C Anode via Ultrathin Amorphous TiO2 Layer for Enhanced Sodium Storage Performance. Small (Weinheim an Der Bergstrasse, Germany), 16(20), e2000745. https://doi.org/10.1002/smll.202000745
Deng X, et al. Surface Modification of Fe7 S8 /C Anode Via Ultrathin Amorphous TiO2 Layer for Enhanced Sodium Storage Performance. Small. 2020;16(20):e2000745. PubMed PMID: 32329571.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Surface Modification of Fe7 S8 /C Anode via Ultrathin Amorphous TiO2 Layer for Enhanced Sodium Storage Performance. AU - Deng,Xianchun, AU - Chen,Hui, AU - Wu,Xiangjiang, AU - Wang,Yun-Xiao, AU - Zhong,Faping, AU - Ai,Xinping, AU - Yang,Hanxi, AU - Cao,Yuliang, Y1 - 2020/04/24/ PY - 2020/02/05/received PY - 2020/03/26/revised PY - 2020/03/27/accepted PY - 2020/4/25/pubmed PY - 2020/4/25/medline PY - 2020/4/25/entrez KW - Fe7S8 anode KW - TiO2 KW - atomic layer deposition KW - interface modification KW - sodium ion batteries SP - e2000745 EP - e2000745 JF - Small (Weinheim an der Bergstrasse, Germany) JO - Small VL - 16 IS - 20 N2 - Iron sulfides with high theoretical capacity and low cost have attracted extensive attention as anode materials for sodium ion batteries. However, the inferior electrical conductivity and devastating volume change and interface instability have largely hindered their practical electrochemical properties. Here, ultrathin amorphous TiO2 layer is constructed on the surface of a metal-organic framework derived porous Fe7 S8 /C electrode via a facile atomic layer deposition strategy. By virtue of the porous structure and enhanced conductivity of the Fe7 S8 /C, the electroactive TiO2 layer is expected to effectively improve the electrode interface stability and structure integrity of the electrode. As a result, the TiO2 -modified Fe7 S8 /C anode exhibits significant performance improvement for sodium-ion batteries. The optimal TiO2 -modified Fe7 S8 /C electrode delivers reversible capacity of 423.3 mA h g-1 after 200 cycles with high capacity retention of 75.3% at 0.2 C. Meanwhile, the TiO2 coating is conducive to construct favorable solid electrolyte interphase, leading to much enhanced initial Coulombic efficiency from 66.9% to 72.3%. The remarkable improvement suggests that the interphase modification holds great promise for high-performance metal sulfide-based anode materials for sodium-ion batteries. SN - 1613-6829 UR - https://www.unboundmedicine.com/medline/citation/32329571/Surface_Modification_of_Fe7_S8_/C_Anode_via_Ultrathin_Amorphous_TiO2_Layer_for_Enhanced_Sodium_Storage_Performance_ L2 - https://doi.org/10.1002/smll.202000745 DB - PRIME DP - Unbound Medicine ER -
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