Solid-state synthesis of Li4Ti5O12 for high power lithium ion battery applications

Title
Solid-state synthesis of Li4Ti5O12 for high power lithium ion battery applications
Author(s)
윤당혁한승우류지헌[류지헌]정좌영[정좌영]
Keywords
SIZED RUTILE TIO2; ANODE MATERIAL; ELECTROCHEMICAL PERFORMANCE; SPINEL LI4TI5O12; COMBUSTION SYNTHESIS; NEGATIVE ELECTRODE; STARTING MATERIALS; ANATASE; ACTIVATION; TRANSITION
Issue Date
201309
Publisher
ELSEVIER SCIENCE SA
Citation
JOURNAL OF ALLOYS AND COMPOUNDS, v.570, pp.144 - 149
Abstract
Li4Ti5O12 was synthesized by a solid-state reaction between Li2CO3 and anatase TiO2 for applications to high power lithium ion batteries. The starting materials underwent 6 h of high energy milling using ZrO2 beads with two different sizes, 0.30 and 0.45 mm. The smaller ZrO2 beads resulted in finer starting materials. Spray drying was also performed on the 0.30 mm beads-treated particles to enhance the screen printability of a paste containing this powder. The finer starting materials showed a pure 162 nm-sized Li4Ti5O12 due to the decreased diffusion length for a solid-state reaction, whereas the 0.45 mm beads-treated starting materials resulted in a 242 nm-sized Li4Ti5O12 phase containing 2 wt.% of rutile TiO2 that had transformed from the anatase phase during heat treatment at 800 degrees C for 3 h. The finer Li4Ti5O12 showed higher charge capacity and better charge/discharge rates than the coarser particles, which highlights the importance of the primary particle size on the electrochemical properties of Li4Ti5O12 for high power applications. The fine Li4Ti5O12 particles had a discharge capacity of 174 mAh/g at 0.1 C and capacity retention of 80% at 10.0 C. (C) 2013 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/29013http://dx.doi.org/10.1016/j.jallcom.2013.03.203
ISSN
0925-8388
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공과대학 > 신소재공학부 > Articles
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