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Optimized electrochemical performance of LiMn0.9Fe0.1−x Mg x PO4/C for lithium ion batteries

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Title: Optimized electrochemical performance of LiMn0.9Fe0.1−x Mg x PO4/C for lithium ion batteries
Authors: Yi, Huihua1, Hu, Chenglin1, Fang, Haisheng hsfang1981@yahoo.com.cn, Yang, Bin1, Yao, Yaochun1, Ma, Wenhui1, Dai, Yongnian1
Source: Electrochimica Acta. Apr2011, Vol. 56 Issue 11, p4052-4057. 6p.
Subjects: Electrochemistry, Lithium-ion batteries, Solid state chemistry, Temperature effect, X-ray diffraction, Cations, Magnesium
Abstract: Abstract: A series of LiMn0.9Fe0.1−x Mg x PO4/C (x =0, 0.01, 0.02, 0.05) was synthesized by a solid state reaction, and the effect of synthesis temperature and Fe/Mg ratio on the electrochemical performance of the obtained materials was investigated by X-ray diffraction, scanning electron microscopy, Raman spectroscopy and electrochemical measurements. The electrochemical performance of the Fe and Mg co-substituted LiMnPO4 was obviously improved with increasing synthesis temperature from 650 to 800°C, but further increase led to an abrupt capacity loss due to the impurity formation. The Fe and Mg co-substitution could remarkably enhance the electrochemical activity of LiMnPO4 compared with the Fe substitution only, but too high level of Mg doping would worsen the rate capability. The LiMn0.9Fe0.09Mg0.01PO4/C synthesized at 800°C demonstrated the optimum electrochemical performance with a high capacity and an excellent rate capability. Even discharged at the rate of 10C, a capacity of 60mAhg−1 was still observed. [Copyright &y& Elsevier]
Copyright of Electrochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 60042731
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Optimized electrochemical performance of LiMn<subscript>0.9</subscript>Fe<subscript>0.1−x </subscript>Mg<subscript> x </subscript>PO<subscript>4</subscript>/C for lithium ion batteries
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  Data: <searchLink fieldCode="AR" term="%22Yi%2C+Huihua%22">Yi, Huihua</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Hu%2C+Chenglin%22">Hu, Chenglin</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Fang%2C+Haisheng%22">Fang, Haisheng</searchLink><i> hsfang1981@yahoo.com.cn</i><br /><searchLink fieldCode="AR" term="%22Yang%2C+Bin%22">Yang, Bin</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Yao%2C+Yaochun%22">Yao, Yaochun</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ma%2C+Wenhui%22">Ma, Wenhui</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Dai%2C+Yongnian%22">Dai, Yongnian</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Electrochimica+Acta%22">Electrochimica Acta</searchLink>. Apr2011, Vol. 56 Issue 11, p4052-4057. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Electrochemistry%22">Electrochemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Lithium-ion+batteries%22">Lithium-ion batteries</searchLink><br /><searchLink fieldCode="DE" term="%22Solid+state+chemistry%22">Solid state chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+effect%22">Temperature effect</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22Cations%22">Cations</searchLink><br /><searchLink fieldCode="DE" term="%22Magnesium%22">Magnesium</searchLink>
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  Label: Abstract
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  Data: Abstract: A series of LiMn0.9Fe0.1−x Mg x PO4/C (x =0, 0.01, 0.02, 0.05) was synthesized by a solid state reaction, and the effect of synthesis temperature and Fe/Mg ratio on the electrochemical performance of the obtained materials was investigated by X-ray diffraction, scanning electron microscopy, Raman spectroscopy and electrochemical measurements. The electrochemical performance of the Fe and Mg co-substituted LiMnPO4 was obviously improved with increasing synthesis temperature from 650 to 800°C, but further increase led to an abrupt capacity loss due to the impurity formation. The Fe and Mg co-substitution could remarkably enhance the electrochemical activity of LiMnPO4 compared with the Fe substitution only, but too high level of Mg doping would worsen the rate capability. The LiMn0.9Fe0.09Mg0.01PO4/C synthesized at 800°C demonstrated the optimum electrochemical performance with a high capacity and an excellent rate capability. Even discharged at the rate of 10C, a capacity of 60mAhg−1 was still observed. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Electrochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.electacta.2011.01.121
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        Text: English
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        PageCount: 6
        StartPage: 4052
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      – SubjectFull: Lithium-ion batteries
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      – SubjectFull: Solid state chemistry
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      – SubjectFull: Temperature effect
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      – SubjectFull: X-ray diffraction
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      – SubjectFull: Cations
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      – SubjectFull: Magnesium
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      – TitleFull: Optimized electrochemical performance of LiMn0.9Fe0.1−x Mg x PO4/C for lithium ion batteries
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              Text: Apr2011
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