Molten Salt Synthesis of Different Ionic Radii Metallic Compounds Doped Lithium Titanate Used in Li-Ion Battery Anodes
Guo, QJ; Wang, Q; Chen, G; Shen, M; Li, B
2017
发表期刊MATERIALS TRANSACTIONS
ISSN1345-9678
卷号58期号:3页码:383-389
文章类型期刊论文
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.
关键词Molten Salt Metallic Compound Lithium Titanate Lithium-ion Battery
DOI10.2320/matertrans.MK201607
收录类别SCI
语种英语
WOS记录号WOS:000398132300015
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/27387
专题中科院上海应用物理研究所2011-2018年
推荐引用方式
GB/T 7714
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,2017,58(3):383-389.
APA Guo, QJ,Wang, Q,Chen, G,Shen, M,&Li, B.(2017).Molten Salt Synthesis of Different Ionic Radii Metallic Compounds Doped Lithium Titanate Used in Li-Ion Battery Anodes.MATERIALS TRANSACTIONS,58(3),383-389.
MLA Guo, QJ,et al."Molten Salt Synthesis of Different Ionic Radii Metallic Compounds Doped Lithium Titanate Used in Li-Ion Battery Anodes".MATERIALS TRANSACTIONS 58.3(2017):383-389.
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