Effects of post-treatments on the electrochemical properties of solid-state reacted Li sub(4)Ti sub(5)O sub(12)-high energy milling and annealing
This study is designed and performed to verify whether nano-sized Li sub(4)Ti sub(5)O sub(12) 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, Li sub(4)Ti sub(5)O sub(12) is synthesi...
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Published in | Journal of electroceramics Vol. 28; no. 2-3; pp. 178 - 184 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
01.05.2012
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Abstract | This study is designed and performed to verify whether nano-sized Li sub(4)Ti sub(5)O sub(12) 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, Li sub(4)Ti sub(5)O sub(12) is synthesized by heat treatment at 800 and 850 degree C for 3 h using Li sub(2)CO sub(3) and TiO sub(2), 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 Li sub(4)Ti sub(5)O sub(12) crystallinity associated with the milling. On the other hand, a subsequent annealing at 750 degree 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. |
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AbstractList | This study is designed and performed to verify whether nano-sized Li sub(4)Ti sub(5)O sub(12) 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, Li sub(4)Ti sub(5)O sub(12) is synthesized by heat treatment at 800 and 850 degree C for 3 h using Li sub(2)CO sub(3) and TiO sub(2), 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 Li sub(4)Ti sub(5)O sub(12) crystallinity associated with the milling. On the other hand, a subsequent annealing at 750 degree 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. |
Author | Ryu, Ji Heon Yoon, Dang-Hyok Jeong, Joayoung Shin, Jin-Wook |
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SubjectTerms | Annealing Crystallinity Deterioration Electrodes Mechanical alloying Nanocomposites Nanostructure Titanium dioxide |
Title | Effects of post-treatments on the electrochemical properties of solid-state reacted Li sub(4)Ti sub(5)O sub(12)-high energy milling and annealing |
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