Effects of the starting materials and mechanochemical activation on the properties of solid-state reacted Li4Ti5O12 for lithium ion batteries

Title
Effects of the starting materials and mechanochemical activation on the properties of solid-state reacted Li4Ti5O12 for lithium ion batteries
Author(s)
홍창훈[홍창훈]노비얀토 알피안[노비얀토 알피안]류지헌[류지헌]김재명[김재명]윤당혁
Keywords
ELECTROCHEMICAL PERFORMANCE; SPINEL LI4TI5O12; ANODE MATERIAL; RUTILE TRANSFORMATION; PHASE-TRANSITION; ELECTRODE; ANATASE; POWER; TIO2; TETRAGONALITY
Issue Date
201201
Publisher
ELSEVIER SCI LTD
Citation
CERAMICS INTERNATIONAL, v.38, no.1, pp.301 - 310
Abstract
Li4Ti5O12 was synthesized by a solid-state reaction between Li2CO3 and TiO2 for applications in lithium ion batteries. The effects of the TiO2 phase and mechanochemical activation on the Li4Ti5O12 particles as well as the corresponding electrochemical properties were investigated. Rutile TiO2 was more desirable in acquiring high purity Li4Ti5O12 than anatase due to the anatase to rutile phase transformation, which was found to be more rigid in the solid-state reaction than the intact rutile phase. Mechanochemical activation of the starting materials was effective in decreasing the reaction temperature and particle size as well as increasing the Li4Ti5O12 content. The specific capacity depended significantly on the Li4Ti5O12 content, whereas the rate capability improved with decreasing particle size due to the enhanced contact area and reduced diffusion path. Overall, a 200 nm-sized Li4Ti5O12 powder with a specific capacity of 165 mAh/g could be synthesized by optimizing the milling method and starting materials. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/30013http://dx.doi.org/10.1016/j.ceramint.2011.07.007
ISSN
0272-8842
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공과대학 > 신소재공학부 > Articles
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