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Electrospun spinel LiNi0.5Mn1.5O4 hierarchical nanofibers as 5 v cathode materials for lithium-ion batteries

Liu, Jun, Liu, Wei, Ji, Shaomin, Zhou, Yichun, Hodgson, Peter and Li, Yuncang 2013, Electrospun spinel LiNi0.5Mn1.5O4 hierarchical nanofibers as 5 v cathode materials for lithium-ion batteries, ChemPlusChem, vol. 78, no. 7, pp. 636-641, doi: 10.1002/cplu.201300180.

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Title Electrospun spinel LiNi0.5Mn1.5O4 hierarchical nanofibers as 5 v cathode materials for lithium-ion batteries
Author(s) Liu, Jun
Liu, Wei
Ji, Shaomin
Zhou, Yichun
Hodgson, Peter
Li, Yuncang
Journal name ChemPlusChem
Volume number 78
Issue number 7
Start page 636
End page 641
Total pages 6
Publisher Wiley
Place of publication London, England
Publication date 2013
ISSN 2192-6506
Keyword(s) capacitance
electrochemistry
electrospinning
lithium
nanostructures
Summary Spinel LiNi0.5Mn1.5O4 hierarchical nanofibers with diameters of 200–500 nm and lengths of up to several tens of micrometers were synthesized using low-cost starting materials by electrospinning combined with annealing. Well-separated nanofiber precursors impede the growth and agglomeration of Li-Ni0.5Mn1.5O4 particles. The hierarchical nanofibers were constructed from attached LiNi0.5Mn1.5O4 nanooctahedrons with sizes ranging from 200 to 400 nm. It is proven that these Li-Ni0.5Mn1.5O4 hierarchical nanofibers exhibit a favorable electrochemical performance. At a 0.5C (coulombic) rate, it shows an initial discharge capacity of 133 mAhg_1 with a capacity retention over 94% after 30 cycles. Even at 2, 5, 10, and 15C rates, it can still deliver a discharge capacity of 115, 100, 90, and 80 mAhg_1, respectively. Compared with self-aggregated nanooctahedrons synthesized using common sol–gel methods, the LiNi0.5Mn1.5O4 hierarchical nanofibers exhibit a much higher capacity. This is owing to the fact that the self-aggregation of the unique nanooctahedron-in-nanofiber structure has been greatly reduced because of the attachment of nanopolyhedrons in the long nanofibers. This unique microstructured cathode results in the large effective contact areas of the active materials, conductive additives and fully realize the advantage of nanomaterial-based cathodes.
Language eng
DOI 10.1002/cplu.201300180
Field of Research 109999 Technology not elsewhere classified
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30055294

Document type: Journal Article
Collection: Institute for Frontier Materials
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Created: Tue, 27 Aug 2013, 11:54:11 EST

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