兴奋剂
锂(药物)
材料科学
电化学
阴极
离子
扩散
相(物质)
化学工程
化学
电极
物理化学
光电子学
热力学
医学
物理
有机化学
工程类
内分泌学
作者
Haisheng Fang,Huihua Yi,Chenglin Hu,Bin Yang,Yaochun Yao,Wenhui Ma,Yongnian Dai
标识
DOI:10.1016/j.electacta.2012.03.160
摘要
In this work, effect of Zn doping on the performance of LiMnPO4 is revisited. Samples of pure and Zn-doped LiMnPO4 are synthesized by a new solid-state method, and their structure, morphology and electrochemical behavior are characterized and compared. The results reveal that a small amount of Zn doping (2 at.%) is highly beneficial for the performance of LiMnPO4 due to the reduced charge transfer resistance, the increased lithium ion diffusion and phase conversion, but this effect is remarkably traded off at a high level of Zn doping (10 at.%). Compared with LiMnPO4, LiMn0.98Zn0.02PO4 has a much higher capacity and a much better rate capability. After 2 at.% Zn doping, the discharge capacity increases from 101 to 139 mAh g−1 at 0.1 C and 56 to 105 mAh g−1 at 2 C.
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