Site-dependent electrochemical performance of Mg doped LiFePO4
Site-dependent electrochemical performance of Mg doped LiFePO4
复制标题
镁掺杂 LiFePO4 的位点相关电化学性能
DOI：
10.1016/j.elecom.2014.04.004
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发表时间：
2014-07-01
影响因子：
5.4
通讯作者：
Lu, Li
中科院分区：
文献类型：
--
作者：
Ni, Jiangfeng;Zhao, Yang;Lu, Li
在LiFePO4材料中掺入奇异金属(EM)可以改善其较差的电导率和电化学性能。这一效应被认为依赖于EM居住地，由于实验困难，这一点尚未得到很好的阐明。在这里，我们报道了在两个不同位置掺杂的镁掺杂LiFePO4样品，即Li1-2xMgxFePO4和LiFe1-xMgxPO4，采用了专门设计的两步反应。电导率和电化学测试结果表明，掺杂的LiFePO4样品的性能高度依赖于镁位，这与理论分析一致。(C)2014爱思唯尔B.V.保留所有权利。
Exotic metal (EM) doping in LiFePO4 materials could mitigate their poor electronic conductivity and electrochemical performance. This effect is believed to be dependent on the EM dwelling site, which has yet been well clarified due to experimental difficulty. Herein, we report on Mg-doped LiFePO4 samples with dopant in two distinct sites, namely the Li1-2xMgxFePO4 and LiFe1-xMgxPO4, using a specially designed two-step reaction. The conductivity and electrochemical test results are a clear indication that the performance of the doped LiFePO4 samples is highly Mg site dependent, consistent with theoretical analysis. (C) 2014 Elsevier B.V. All rights reserved.