One-pot sol-gel synthesis of Li 4 Ti 5 O 12 /C anode materials for high-performance Li-ion batteries
作者： Yi-Chen Kuo , Jeng-Yu Lin
DOI: 10.1016/J.ELECTACTA.2014.07.103
关键词:
摘要: Abstract In this study, Li4Ti5O12/C (LTO/C) composites were successfully synthesized via a facile one-pot sol-gel method using citric acid as carbon source. The physical and electrochemical properties of the as-prepared extensively investigated. These analyses signify that uniformly coated layer from on surface LTO particles was found, also resulting in partial reduction Ti4+ to Ti3+ after sintering an inert atmosphere. Owing synergistic effect highly conductive coating mixed valence Ti4+/Ti3+, LTO/C composite electrode showed significantly improved high-rate capability stability, which delivered initial discharge capacity 165.7, 161.7, 153.9 147.9 mAh g−1 at charge/discharge current density 1, 5, 10, 20 C, respectively, even retained up 98% first cycle consecutive 50 cycles 20 C. This process may present pathway for large-scale preparation high-performance anode materials lithium-ion batteries.
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sci-hub.se 参考文章(50)
Ping Liu, Zhi-an Zhang, Jie Li, Yan-qing Lai, Effects of carbon sources on electrochemical performance of Li4Ti5O12/C composite anode materials Journal of Central South University of Technology. ,vol. 17, pp. 1207- 1210 ,(2010) , 10.1007/S11771-010-0620-3
Ju Bin Kim, Dong Jin Kim, Kyung Yoon Chung, Dongjin Byun, Byung Won Cho, Research on carbon-coated Li4Ti5O12 material for lithium ion batteries Physica Scripta. ,vol. 2010, pp. 014026- ,(2010) , 10.1088/0031-8949/2010/T139/014026
Tsutomu Ohzuku, Atsushi Ueda, Norihiro Yamamoto, Zero‐Strain Insertion Material of Li [ Li1 / 3Ti5 / 3 ] O 4 for Rechargeable Lithium Cells Journal of The Electrochemical Society. ,vol. 142, pp. 1431- 1435 ,(1995) , 10.1149/1.2048592
C. H. Chen, J. T. Vaughey, A. N. Jansen, D. W. Dees, A. J. Kahaian, T. Goacher, M. M. Thackeray, Studies of Mg-Substituted Li4−xMg x Ti5O12 Spinel Electrodes (0≤x≤1) for Lithium Batteries Journal of The Electrochemical Society. ,vol. 148, ,(2001) , 10.1149/1.1344523
J.-M. Tarascon, M. Armand, Issues and challenges facing rechargeable lithium batteries Nature. ,vol. 414, pp. 359- 367 ,(2001) , 10.1038/35104644
Li Wang, Zonglin Zhang, Guangchuan Liang, Xiuqin Ou, Yingqiu Xu, Synthesis and electrochemical performance of Li4Ti5O12/C composite by a starch sol assisted method Powder Technology. ,vol. 215, pp. 79- 84 ,(2012) , 10.1016/J.POWTEC.2011.09.011
D. Wang, N. Ding, X. H. Song, C. H. Chen, A simple gel route to synthesize nano-Li4Ti5O12 as a high-performance anode material for Li-ion batteries Journal of Materials Science. ,vol. 44, pp. 198- 203 ,(2009) , 10.1007/S10853-008-3104-1
Shuangze Ji, Junying Zhang, Wenwen Wang, Yan Huang, Zerong Feng, Zhongtai Zhang, Zilong Tang, Preparation and effects of Mg-doping on the electrochemical properties of spinel Li4Ti5O12 as anode material for lithium ion battery Materials Chemistry and Physics. ,vol. 123, pp. 510- 515 ,(2010) , 10.1016/J.MATCHEMPHYS.2010.05.006
Chien-Te Hsieh, Bi-Sheng Chang, Jia-Yi Lin, Ruey-Shin Juang, Improvement of rate capability of spinel lithium titanate anodes using microwave-assisted zinc nanocoating Journal of Alloys and Compounds. ,vol. 513, pp. 393- 398 ,(2012) , 10.1016/J.JALLCOM.2011.10.055
P.G. Balakrishnan, R. Ramesh, T. Prem Kumar, Safety mechanisms in lithium-ion batteries Journal of Power Sources. ,vol. 155, pp. 401- 414 ,(2006) , 10.1016/J.JPOWSOUR.2005.12.002