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

通信作者：Guo, JB[1];Song, JL[2];Song, JL[3];Guo, JB[3]

机构：[1]Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Peoples R China;[2]Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R China;[3]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China;[4]Guizhou Qiancai S&T Dev Co Ltd, Guiyang 550003, Peoples R China

第一机构：Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Peoples R China;corresponding author), Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R China;corresponding author), Guizhou Qiancai S&T Dev Co Ltd, Guiyang 550003, Peoples R China.

年份：2023

卷号：34

期号：25

外文期刊名：JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001059926200001)】；

基金：This work was supported by the Natural Science Foundation of China (52063005), Science and Technology Support Project of Guizhou Province (2021/488), Guizhou Province High-level Innovative Talents Training Project (2016/5667). Science and Technology Support~Project of Guizhou Province (2023/356).

语种：英文

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.