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：Chen, Tian Ci Guo, Jianbing Wu, Hong Ming Zhou, Deng Feng Song, Ji Ling

第一作者：Chen, Tian Ci

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

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230065485)

语种：英文

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

摘要：Sr-doped Li4Ti5O12 (LTO) was synthesized via a facile hydrothermal method. Samples synthesized in this work kept the origin crystal structure of pure Li4Ti5O12 but changed morphology to a thin and wide lamellar structure, and the lattice parameter of doped materials increases, which could improve the electrochemical properties. Among all samples, Li4-xSrxTi5O12(x=0.025, marked as 25-Sr) presents optimal electrochemical properties. It possesses the highest initial discharge capacity of 215.073 mAh/g at 0.2C (1C=175 mAh/g). By contrast, the pristine just owns 163.174mAh/g at same condition. 25-Sr also delivers superior rate performance at varied current densities, and presents better cycling stability. It has a specific capacity of 129.8 mAh/g and retention of 80.02% at 10C for 500 cycles, much higher than the pristine LTO (87.6 mAh/g, 66.06%). The thinned layered structure and increased electrical conductivity synergically improve the electrochemical performance of the doped material. ? 2023, The Authors. All rights reserved.