Effects of post-treatments on the electrochemical properties of solid-state reacted Li4Ti5O12-high energy milling and annealing

Title
Effects of post-treatments on the electrochemical properties of solid-state reacted Li4Ti5O12-high energy milling and annealing
Author(s)
신진욱[신진욱]류지헌[류지헌]정좌영[정좌영]윤당혁
Keywords
LITHIUM-ION BATTERIES; SPINEL LI4TI5O12; ANODE MATERIAL; LI-INSERTION; PERFORMANCE; ELECTRODE; TETRAGONALITY; POWDER; POWER
Issue Date
201205
Publisher
SPRINGER
Citation
JOURNAL OF ELECTROCERAMICS, v.28, no.2-3, pp.178 - 184
Abstract
This study is designed and performed to verify whether nano-sized Li4Ti5O12 particles can be acquired by simple high energy milling from the economic solid-state reacted coarse powder for high power lithium ion battery applications. For this, Li4Ti5O12 is synthesized by heat treatment at 800 and 850A degrees C for 3 h using Li2CO3 and TiO2, followed by high energy milling. Even though a comparable particle size to that of expensive wet chemical methods, or even a smaller particle size of 25 nm, can be acquired by 5 h of milling, the electrochemical properties of the particles are found to be deteriorated due to the decrease in Li4Ti5O12 crystallinity associated with the milling. On the other hand, a subsequent annealing at 750A degrees C for the milled powder is shown to recover both the capacity and rate capability of the anode electrode owing to the increased crystallinity, indicating the importance of particle crystallinity besides a fine particle size for the enhanced electrochemical properties for high power applications.
URI
http://hdl.handle.net/YU.REPOSITORY/28407http://dx.doi.org/10.1007/s10832-012-9703-x
ISSN
1385-3449
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공과대학 > 신소재공학부 > Articles
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