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Engineering Hierarchical CoO Nanospheres Wrapped by Graphene via Controllable Sulfur Doping for Superior Li Ion Storage
Hu, YF; Li, ZC; Hu, ZC; Wang, L; Ma, RG; Wang, JC
2020-10-22
Source PublicationSMALL
ISSN1613-6810
Issue42
SubtypeArticle
AbstractThe inferior conductivity and large volume expansion impair the widespread applications of metal oxide-based anode materials for lithium-ion batteries. To address these issues, herein an efficient strategy of structural engineering is proposed to improve lithium storage performance of hierarchical CoO nanospheres wrapped by graphene via controllable S-doping (CoOS0.1 @ G). S-doping promotes the Li(+)diffusion kinetics of CoO by expanding the interplanar spacing of CoO, lowering the activation energy, and improving the pseudocapacitance contribution. Meanwhile, the electronic structure of CoO is adjusted by S-doping as confirmed by density functional theory calculations, thus enhancing the conductivity. Finite element analysis reveals that the produced Li2S during lithiation improves the structural stability of the S-doped electrode, which is further confirmed by experimental observation. As expected, CoOS0.1 @ G exhibits excellent lithium storage performance with an initial discharge capacity of 1974 mAh g(-1)at 100 mA g(-1), and high discharge capacity of 1573 mAh g(-1)after 400 cycles at 500 mA g(-1). It is believed that the insights into the structural doping enlighten research to explore other metal oxides for fast and stable Li ion storage.
DOI10.1002/smll.202003643
WOS KeywordBINDER-FREE ; HIGH-CAPACITY ; LITHIUM ; BATTERIES ; NANOCOMPOSITE ; ENHANCEMENT ; SPHERES ; ANODES
Language英语
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27733
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Hu, YF,Li, ZC,Hu, ZC,et al. Engineering Hierarchical CoO Nanospheres Wrapped by Graphene via Controllable Sulfur Doping for Superior Li Ion Storage[J]. SMALL,2020(42).
APA Hu, YF,Li, ZC,Hu, ZC,Wang, L,Ma, RG,&Wang, JC.(2020).Engineering Hierarchical CoO Nanospheres Wrapped by Graphene via Controllable Sulfur Doping for Superior Li Ion Storage.SMALL(42).
MLA Hu, YF,et al."Engineering Hierarchical CoO Nanospheres Wrapped by Graphene via Controllable Sulfur Doping for Superior Li Ion Storage".SMALL .42(2020).
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