文献类型：期刊文献

英文题名：Li4Ti5O12 prepared by Sr-doped for Li-ion batteries with enhanced electrochemical performance

作者：He, Kun Chen, Tianci Wu, Hongming Zhou, Dengfeng Song, Jiling Guo, Jianbing

第一作者：He, Kun

机构：[1] Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China; [2] National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang, 550014, China; [3] School of Materials and Energy Engineering, Guizhou Institute of Technology, Guiyang, 550003, China; [4] Guizhou Qiancai S&T Development Co., Ltd, Guiyang, 550003, China

第一机构：Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China

通信机构：Guizhou Qiancai S&T Development Co., Ltd, Guiyang, 550003, China;Guizhou Qiancai S&T Development Co., Ltd, Guiyang, 550003, China

年份：2023

卷号：34

期号：25

外文期刊名：Journal of Materials Science: Materials in Electronics

收录：EI(收录号：20233614684406);Scopus(收录号：2-s2.0-85169671201)

语种：英文

外文关键词：Anodes - Crystal structure - Electric discharges - Lithium-ion batteries - Strontium compounds - Titanium compounds

摘要：Li4Ti5O12 (LTO) is considered as a new anode material with great potential because of its "zero strain" performance. To further improve the electrochemical behavior, Sr-doped LTO was synthesized via a facile hydrothermal method. The Sr2+ with bigger radius integrated into LTO did not change the origin crystal morphology of pure Li4Ti5O12 but attenuate the layered structure. XRD results testified that the lattice parameter of doped materials increases with the doping amount. EDS mapping further demonstrated the homogeneous distribution of strontium. Electrochemical tests show that Li3.975Sr0.025Ti5O12 presents optimal electrochemical properties. It possesses the highest initial discharge capacity of 215?mAh/g, while the pristine LTO just owns 163?mAh/g at 0.2?C. Li3.975Sr0.025Ti5O12 also delivers superior rate performance and cycling stability. It has a specific capacity retention of 80.02% at 10?C for 500 cycles, much higher than the 66.06% of pristine LTO. The thin and layered structure and increased electrical conductivity synergically improve the electrochemical performance of the doped material. ? 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.