Preparation and Electrochemical Performance of Ti2Nb10O29/Ag Composite as Anode Materials for Lithium Ion Batteries
Preparation and Electrochemical Performance of Ti2Nb10O29/Ag Composite as Anode Materials for Lithium Ion Batteries
复制标题
锂离子电池负极材料Ti2Nb10O29/Ag复合材料的制备及电化学性能
DOI：
10.1016/j.electacta.2017.09.072
复制
发表时间：
2017-11-01
影响因子：
6.6
通讯作者：
Qian, Yitai
中科院分区：
文献类型：
--
作者：
Mao, Wutao;Liu, Kecheng;Qian, Yitai
在锂离子电池中，负极材料是非常关键的。探索高性能的负极材料仍然是一个巨大的挑战。在此基础上制备了Ti_2Nb_10O_29/Ag复合材料。电化学测试表明，Ti 2Nb 10 O29/Ag复合材料的电化学性能优于纯Ti 2Nb 10 O29，这主要是由于Ag包覆后导电性的提高。Ti_2Nb_（10）O_（29）/Ag复合材料在1C和10 C下的比容量分别高达253和173 mAh·g ~（-1），在20 C下的比容量为132 mAh·g ~（-1）。此外，Ti 2Nb 10 O29/Ag复合材料具有良好的循环稳定性，即使在500次循环后，其10 C下的比容量仍稳定在142 mAh g（-1），与纯Ti 2Nb 10 O29的相应值（68 mAh g（-1））形成鲜明对比。高的电化学性能表明Ti 2Nb 10 O29/Ag复合材料是一种很有前途的锂离子电池负极材料。(C)2017爱思唯尔有限公司出版
In lithium ion batteries anode material is very crucial. Exploring the high-performance anode materials remains a great challenge. Here, Ti2Nb10O29/Ag composite was obtained. Electrochemical measurements demonstrate that Ti2Nb10O29/Ag composite shows good electrochemical performance than pure Ti2Nb10O29, mostly due to enhanced electronic conductivity after Ag-coating. The specific capacities of Ti2Nb10O29/Ag composite can be as high as 253 and 173 mAh g(-1) at 1 and 10C, respectively, and the specific capacity is 132 mAh g(-1) at 20C. Moreover, the Ti2Nb10O29/Ag composite exhibited excellent cyclic stability, even after 500 cycles, its specific capacity at 10C still stabilized at a large value of 142 mAh g(-1), which was in sharp contrast to the corresponding values of pure Ti2Nb10O29 (68 mAh g(-1)). The high electrochemical performance demonstrated that Ti2Nb10O29/Ag composite is highly promising anode materials for Li-ion batteries. (C) 2017 Published by Elsevier Ltd.