Tris(trimethylsilyl) borate as an electrolyte additive to improve the cyclability of LiMn2O4 cathode for lithium-ion battery
Tris(trimethylsilyl) borate as an electrolyte additive to improve the cyclability of LiMn2O4 cathode for lithium-ion battery
复制标题
三(三甲基硅基)硼酸酯作为电解液添加剂改善锂离子电池LiMn2O4正极的循环性能
DOI：
10.1016/j.jpowsour.2012.08.028
复制
发表时间：
2013-01-01
影响因子：
9.2
通讯作者：
Li, Lei
中科院分区：
文献类型：
--
作者：
Liu, Yanbo;Tan, Lei;Li, Lei
为了克服LiMn2O4阴极锂离子电池严重的容量衰减问题，采用三甲基硅基硼酸三酯（TMSB）作为电解液添加剂。在电解液（EC/DMC + 1 M LiPF6）中加入0.5 wt%的TMSB，在室温和55℃下的容量保留率都有显著提高。通过循环性能、高温储存容量保留率、电化学阻抗谱（EIS）、扫描电镜（SEM）、x射线光电子能谱（XPS）和x射线衍射（XRD）等方法研究了TMSB对LiMn2O4电极的影响。综上所述，含TMSB添加剂的电池可循环性的提高主要是由于其参与了电极表面固体电解质界面（SEI）的形成，LiF从SEI中溶解出来，增强了锂阳极的可循环性。(C) 2012 Elsevier B.V.版权所有
In order to overcome severe capacity fading of LiMn2O4 cathode lithium-ion battery, tris(trimethylsilyl) borate (TMSB) is used as an electrolyte additive. With 0.5 wt% TMSB addition into the electrolyte (EC/DMC with 1 M LiPF6), the capacity retention is significantly improved at both room temperature and 55 degrees C. The effects of the TMSB on the LiMn2O4 electrode are investigated via a combination of cyclability, capacity retention of high temperature storage, electrochemical impedance spectroscopy (EIS), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). Based on these results, it is suggested that the improved cyclability of the cells containing the TMSB additive is mainly originated from the participation in the formation of solid electrolyte interface (SEI) on the surface of electrode, the dissolution of LiF out of the SEI and the enhancement of cyclability of Li anode. (C) 2012 Elsevier B.V. All rights reserved.