Electrospun Li4Ti5O12 nanofibers sheathed with conductive TiN/TiOxNy layer as an anode material for high power Li-ion batteries

Title
Electrospun Li4Ti5O12 nanofibers sheathed with conductive TiN/TiOxNy layer as an anode material for high power Li-ion batteries
Author(s)
송태섭Hyunjung Park[Hyunjung Park]Hyungkyu Han[Hyungkyu Han]Ungyu Paik[Ungyu Paik]
Keywords
CARBON-COATED LI4TI5O12; LITHIUM CELLS; ELECTROCHEMICAL PROPERTIES; SPINEL; TIO2
Issue Date
201312
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, v.244, pp.726 - 730
Abstract
Spinel lithium titanate (Li4Ti5O12) has attracted great interest as an anode material for lithium ion batteries due to its safe operation, low cost, and zero-strain effect during Li insertion/extraction. However, the poor rate capability caused by low electronic conductivity limits its practical use. We synthesized surface functionalized one-dimensional (1D) Li4Ti5O12 nanofibers using simple electrospinning and subsequent nitridation process. Uniformly coated conducting TiN/TiOxNy layer on the surface of Li4Ti5O12 nanofiber enables fast electron transport along its one dimensional geometry, which leads to significant improvement in rate capability. Nitridated Li4Ti5O12 nanofibers electrode delivers about 1.35 times larger discharge capacity than that of pristine nanofibers electrode at a current density of 10 C. (C) 2012 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/28243http://dx.doi.org/10.1016/j.jpowsour.2012.11.078
ISSN
0378-7753
Appears in Collections:
공과대학 > 신소재공학부 > Articles
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