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CAS OpenIR  > 中科院上海应用物理研究所2011-2017年  > 期刊论文
题名:
Molten Salt Synthesis of Different Ionic Radii Metallic Compounds Doped Lithium Titanate Used in Li-Ion Battery Anodes
作者: Guo, QJ; Wang, Q; Chen, G; Shen, M; Li, B
刊名: MATERIALS TRANSACTIONS
出版日期: 2017
卷号: 58, 期号:3, 页码:383-389
关键词: molten salt ; metallic compound ; lithium titanate ; lithium-ion battery
DOI: 10.2320/matertrans.MK201607
文章类型: 期刊论文
英文摘要: In order to systematically characterize the effects of ion doping on Li4Ti5O12 (LTO) through the molten salt method, different metallic compounds with varying ionic radii doped into LTO were investigated. The results show that doped ions (Al3+, Ni2+, Fe2+, Fe3+ and F-) with similar ionic radius as Li+, Ti4+ or O2- ions can enter into LTO, which leads to smaller particle size than pure LTO, therefore, increasing the specific surface area and shortening Li+ transfer path of LTO. However, La3+ with a much larger ionic radius cannot enter into LTO. Ion doping can enhance the intrinsic conductivity of LTO, thus improving the electrochemical performance of LTO. As the ionic radii of Fe2+ and Fe3+ are the closest to those of Li+ and Ti4+, Fe3O4 doped LTO exhibits the best electrochemical performance, an excellent first discharge capacity of 269.3 mAh.g(-1) at the 0.15 degrees C, good high-rate capability (123.4 mAh.g(-1) at 10 degrees C); even after 300 discharge/charge cycles, the discharge capacity is 141.1 mAh.g(-1), gives an excellent cycle performance with 12.4% loss of capacity at 1 degrees C rate. Due to these factors, Fe3O4 is the most suitable metallic compound doped in LTO via molten salt method.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000398132300015
ISSN号: 1345-9678
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27387
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Guo, QJ,Wang, Q,Chen, G,et al. Molten Salt Synthesis of Different Ionic Radii Metallic Compounds Doped Lithium Titanate Used in Li-Ion Battery Anodes[J]. MATERIALS TRANSACTIONS,2017-01-01,58(3):383-389.
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