Electrochemical performance of LiMnPO4 by Fe and Zn co-doping for lithium-ion batteries

被引：35
|
作者：
Yi, Huihua [1 ,2 ]
Hu, Chenglin [1 ,2 ,3 ]
He, Xiangming [4 ]
Xu, Hongyun [1 ,2 ]
机构：
[1] Hubei Polytech Univ, Inst Quantum Mat, Huangshi 435003, Peoples R China
[2] Hubei Polytech Univ, Sch Met & Mat, Huangshi 435003, Peoples R China
[3] Hubei Polytech Univ, Hubei Key Lab Mine Environm Pollut Control & Reme, Huangshi 435003, Peoples R China
[4] Tsinghua Univ, Inst Nucl & New Energy Technol, Beijing 100084, Peoples R China
来源：
IONICS | 2015年 / 21卷 / 03期
关键词：
Lithium-ion batteries; Lithium manganese phosphate; Cathode; Doping; Magnesium dissolution; ADVANCED CATHODE MATERIAL; OLIVINE CATHODE; LIMPO4; M; MN; NI; PHOSPHATE; MG;
D O I：
10.1007/s11581-014-1238-5
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
To study the effect of Fe and/or Zn doping on the performance of LiMnPO4, LiMn0.9Fe0.1-x Zn (x) PO4/C (x = 0, 0.05, and 0.1) composites were synthesized by a solid-state process. They are all single phase with olivine structure but LiMn0.9(FeZn)(0.05)PO4/C reveals a different morphology. The Fe-Zn co-doping remarkably enhances the performance of LiMnPO4 due to the presence of Fe and Zn in olivine framework resulting in the decrease of charge transfer resistance and Mn ion dissolution. Compared with LiMn0.9Fe0.1PO4/C and LiMn0.9Zn0.1PO4/C, LiMn0.9(FeZn)(0.05)PO4/C exhibits much higher discharge capacity and better rate capability. It delivers the capacities of 151.3 mAh g(-1) at 0.1 C and 128.4 mAh g(-1) at 1 C and retains 96.7 % of the initial capacity after 100 cycles.
引用
收藏
页码：667 / 671
页数：5
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