Li2TiO3包覆高倍率锂离子电池材料.pdf

Communication /JACS Nanoscale Coating of LiMO2 (M = Ni, Co, Mn) Nanobelts with Li+‑Conductive Li TiO : Toward Better Rate Capabilities for Li-Ion 2 3 Batteries Jun Lu, Qing Peng, * Weiyang Wang, Caiyun Nan, Lihong Li, and Yadong Li Department of Chemistry, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084 S *Supporting Information complete and doped Li2TiO3 coating layer can help to improve ABSTRACT: By using a novel coating approach based on the rate capability as well as the cycling stability of LiMO2 the reaction between MC O ·xH O and Ti(OC H ) , a materials, which will be significant to the performance 2 4 2 4 9 4 series of nanoscale Li TiO -coated LiMO nanobelts with improvement of various cathode materials.24−26 2 3 2 varied Ni, Co, and Mn contents was prepared for the first As to the coating route, traditional approaches such as time. The complete, thin Li2TiO3 coating layer strongly mechanical mixing, sol−gel, and atomic deposition methods adheres to the host material and has a 3D diffusion path have been developed.27−29 However, these methods cannot for Li+ ions. It is doped with Ni2+ and Co3+ i