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Porous ZnO/Co3O4/N-doped carbon nanocages synthesized via pyrolysis of complex metal-organic framework (MOF) hybrids as an advanced lithium-ion battery anode
Shanghai Univ, Peoples R China.
Shanghai Univ, Peoples R China.
Shanghai Univ, Peoples R China; Chizhou Univ, Peoples R China.
Shanghai Univ, Peoples R China.
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2019 (English)In: ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY, ISSN 2053-2296, Vol. 75, p. 969-978Article in journal (Refereed) Published
Abstract [en]

Metal oxides have a large storage capacity when employed as anode materials for lithium-ion batteries (LIBs). However, they often suffer from poor capacity retention due to their low electrical conductivity and huge volume variation during the charge-discharge process. To overcome these limitations, fabrication of metal oxides/carbon hybrids with hollow structures can be expected to further improve their electrochemical properties. Herein, ZnO-Co3O4 nanocomposites embedded in N-doped carbon (ZnO-Co3O4@N-C) nanocages with hollow dodecahedral shapes have been prepared successfully by the simple carbonizing and oxidizing of metal-organic frameworks (MOFs). Benefiting from the advantages of the structural features, i.e. the conductive N-doped carbon coating, the porous structure of the nanocages and the synergistic effects of different components, the as-prepared ZnO-Co3O4@N-C not only avoids particle aggregation and nanostructure cracking but also facilitates the transport of ions and electrons. As a result, the resultant ZnO-Co3O4@N-C shows a discharge capacity of 2373 mAh g(-1) at the first cycle and exhibits a retention capacity of 1305 mAh g(-1) even after 300 cycles at 0.1 A g(-1). In addition, a reversible capacity of 948 mAh g(-1) is obtained at a current density of 2 A g(-1), which delivers an excellent high-rate cycle ability.

Place, publisher, year, edition, pages
INT UNION CRYSTALLOGRAPHY , 2019. Vol. 75, p. 969-978
Keywords [en]
MOFs; metal oxides; N-doped carbon; nanocage; lithium-ion batteries; crystal structure; anode material
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-158931DOI: 10.1107/S2053229619008222ISI: 000474222100018PubMedID: 31271386OAI: oai:DiVA.org:liu-158931DiVA, id: diva2:1338198
Note

Funding Agencies|National Natural Science Foundation of China [21601120, 1375111, 11575105]; Science and Technology Commission of Shanghai Municipality [17ZR1410500]; Key Natural Science Foundation of Anhui Provincial Education Commission [KJ2016A510]; Anhui Provincial Science Foundation for Excellent Youth Talents; Educational Quality and Innovation Project of Anhui Province [2015jyxm398]

Available from: 2019-07-20 Created: 2019-07-20 Last updated: 2019-07-20

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Molecular Surface Physics and Nano ScienceFaculty of Science & Engineering
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