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Cobalt sulfide nanoparticles restricted in 3D hollow cobalt tungstate nitrogen-doped carbon frameworks incubating stable interfaces for Li-ion storage
Zheng, Yun1; Xu, Yang2; Guo, Junpo1; Li, Jianding3; Shen, Jingjun1; Guo, Yan1; Bao, Xiaozhi1; Huang, Yike1; Zhang, Qi1; Xu, Jincheng1; Wu, Jue4; Ian, Hou1; Shao, Huaiyu1
2022-11-01
Source PublicationElectrochimica Acta
ISSN0013-4686
Volume431
Abstract

Hierarchical nanostructures that comprise multiple tiers of structural subunits and diverse chemical components can provide more active storage sites and relieve the micro-strain due to volumetric change than solid structures in LIBs. In this work, we designed the facile preparation of a yolk-shell structure based on Ostwald ripening for steady lithium-ion storage with CoS@CoWO/nitrogen-doped carbon nanohybrids (YS-CoS@CoWO-NC) as anodes. This yolk-shell configuration design not only accelerated the diffusion of lithium-ion during the lithiation process but also constructed stable interfaces for achieving more steady cycling. It consequently delivered long cycle stability (780 mAh·g after 250 cycles at 1000 mA·g) and excellent rate capacities (1023, 767 mAh·g at 100, 2000 mA·g, respectively). Furthermore, in-situ electrochemical impedance spectroscopy was successfully implemented to monitor interface properties by simultaneously recording the impedance during discharging and charging processes. The incubating of stable interfacial layers was further confirmed by ex-situ SEM. These results fully affirmed the contribution of hierarchical nanostructures to the construction of stable interfaces, achieving long cycle Li-ion storage.

KeywordHierarchical Nanostructures In-situ Eis Li-ion Transfer And Storage Mofs Ostwald Ripening
DOI10.1016/j.electacta.2022.141134
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
WOS IDWOS:000863278600003
Scopus ID2-s2.0-85137034254
Fulltext Access
FWCI0.0
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Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Affiliation1.Guangdong-Hong Kong-Macau Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Avenida da Universidade, Macao SAR, 999078, Macao
2.Department of Chemistry, Capital Normal University, Beijing, 100048, China
3.School of Science, Huzhou University, Huzhou, 313000, China
4.Zhuhai College of Science and Technology, Zhuhai, 519041, China
First Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Zheng, Yun,Xu, Yang,Guo, Junpo,et al. Cobalt sulfide nanoparticles restricted in 3D hollow cobalt tungstate nitrogen-doped carbon frameworks incubating stable interfaces for Li-ion storage[J]. Electrochimica Acta,2022,431.
APA Zheng, Yun,Xu, Yang,Guo, Junpo,Li, Jianding,Shen, Jingjun,Guo, Yan,Bao, Xiaozhi,Huang, Yike,Zhang, Qi,Xu, Jincheng,Wu, Jue,Ian, Hou,&Shao, Huaiyu.(2022).Cobalt sulfide nanoparticles restricted in 3D hollow cobalt tungstate nitrogen-doped carbon frameworks incubating stable interfaces for Li-ion storage.Electrochimica Acta,431.
MLA Zheng, Yun,et al."Cobalt sulfide nanoparticles restricted in 3D hollow cobalt tungstate nitrogen-doped carbon frameworks incubating stable interfaces for Li-ion storage".Electrochimica Acta 431(2022).
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