Improved electrochemical performance of LiFe0.65Mn0.35PO4cathode material by using electrolytic manganese dioxide for lithium-ion battery

The olivine-type structure LiFe（0.65）Mn（0.35）PO4 materials are respectively synthesized via MnO2 and MnC2 O4·2 H2 O as manganese resources by using solid-state reaction. The compound materials are characterized by scanning electron microscopies（SEM）,transmission electron microscopy（TEM）, X-ray photo...

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Bibliographic Details
Published in:中国科学：技术科学英文版 2017, Vol.60 (12), p.1853-1860
Main Authors: ZHOU HuangKai, LU JinHua, HUANG XiaoPeng, DU YuanChao, LIANG Feng, YAO YaoChun
Format: Article
Language:English
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Summary:The olivine-type structure LiFe（0.65）Mn（0.35）PO4 materials are respectively synthesized via MnO2 and MnC2 O4·2 H2 O as manganese resources by using solid-state reaction. The compound materials are characterized by scanning electron microscopies（SEM）,transmission electron microscopy（TEM）, X-ray photoelectronspectroscopy（XPS） and electrochemical test. The experimental results demonstrate that LiFe（0.65）Mn（0.35）PO4 prepared by MnO2 as manganese resource exhibits uniform particles with porous structure in SEM and TEM images. XPS data show the coexistence of Mn^4＋, Mn^3＋ and Mn^2＋ cations. Besides, this sample shows better discharge special capacity of 107.46 mA h g^-1 at 5 C and capacitance conservation rate about 95.47% after 100 cycles at1 C. The superior electrochemical capability is attributed to the coexistence of mixed-valence manganese cations in crystal and the uniform particles with porous structure.
ISSN:1674-7321
1869-1900