Synthesis and performance of Mn-doped Li3Fe2(PO4)3materials

被引：0
|
作者：
Song, Cui-Huan [1 ,2 ]
Sun, Jun-Kang [2 ]
Huang, Fu-Qiang [2 ]
Liu, Zhan-Qiang [2 ]
He, Pin-Gang [1 ]
机构：
[1] Chemistry Department, East China Normal University, Shanghai 200062, China
[2] Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
来源：
Gongneng Cailiao/Journal of Functional Materials | 2009年 / 40卷 / 04期
关键词：
Lithium-ion batteries - Manganese - Cathodes - Solid state reactions - Electric discharges;
D O I：
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学科分类号：
摘要：
The monoclinic Li3+xFe2-xMnxII(PO4)3(x=0-0.1), Li3Fe1.95Mn0.05III(PO4)3and Li2.95Fe1.95Mn0.05IV(PO4)3cathodes were synthesized by solid state reaction. The synthesized powders were ball-milled with acethylene carbon to reduce the particle sizes and improve the electronic conductivity of the active materials. The galvanostatic charge/discharge test and the cyclic voltammetry (C-V) revealed that all of them had two plateau potentials of Fe3+/Fe2+couple vs. Li/Li+at 2.8 and 2.7 V upon discharge. The plateau potential of Mn3+/Mn2+at 3.5 V was observed in Li3+xFe2-xMnxII(PO4)3and Li3Fe1.95Mn0.05III(PO4)3cathodes. Furthermore, the Mn doping was demonstrated to be able to improve the electrochemical performances of the cathodes. In all the samples, the Li3.05Fe1.95MnII0.05 (PO4)3/C cathode showed the best electrochemical performances and possessed the discharge capacities of 110 mAh/g at C/20 and 66 mAh/g at C/2.
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页码：604 / 607
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