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有色金属工程:2018,8(3):-
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LiMn0.6Fe0.4PO4/C纳米片正极材料的水热合成及其电化学性能
吴玉荣,刘思远,岳彩波,朱彦荣,伊廷锋
(安徽工业大学 化学与化工学院,安徽工业大学 化学与化工学院,安徽工业大学 化学与化工学院,安徽工业大学 化学与化工学院,安徽工业大学 化学与化工学院)
Hydrothermal Synthesis and Electrochemical Performance of LiMn0.6Fe0.4PO4/C Nanosheet as Positive Electrode Material
WU Yu-rong,LIU Si-yuan,YUE Cai-bo,ZHU Yan-rong and YI Ting-feng
(School of Chemistry and Chemical Engineering,Anhui University of Technology,Maanshan,School of Chemistry and Chemical Engineering,Anhui University of Technology,Maanshan,School of Chemistry and Chemical Engineering,Anhui University of Technology,Maanshan,School of Chemistry and Chemical Engineering,Anhui University of Technology,Maanshan,School of Chemistry and Chemical Engineering,Anhui University of Technology,Maanshan)
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投稿时间:2017-05-09    修订日期:2017-05-16
中文摘要: 采用乙二醇辅助的水热法合成了锂离子电池LiMn0.6Fe0.4PO4/C纳米片正极材料,并采用X射线衍射(XRD)及其Rietveld精修和扫描电子显微镜(SEM)研究了材料的结构与形貌;采用循环伏安(CV)和充放电测试研究了材料的电化学性能。XRD及其Rietveld精修表明,LiMn0.6Fe0.4PO4/C纳米片具有与LiMnPO4类似的结构,无杂质峰。SEM表明,LiMn0.6Fe0.4PO4/C的形貌为片层状结构。CV表明,LiMn0.6Fe0.4PO4/C存在Mn2 /Mn3 和Fe2 /Fe3 两步转化过程。充放电测试结果表明,LiMn0.6Fe0.4PO4/C纳米片具有较好的倍率容量和循环稳定性。5C倍率放电时,100次循环的容量仍高达115.8 mAh/g左右,容量保有率为95.8%。
Abstract:LiMn0.6Fe0.4PO4/C nanosheet cathode material was synthesized by ethylene glycol assisted hydrothermal method, and the structure and morphology were studied by X-ray diffraction (XRD) Rietveld and scanning electron microscopy (SEM), respectively. The electrochemical properties were investigated by cyclic voltammetry (CV) and charge-discharge tests, respectively. XRD Rietveld result shows that the structure of LiMn0.6Fe0.4PO4/C nanosheet is similar with LiMnPO4, and the impurity peak is not found. SEM indicates that the morphology of LiMn0.6Fe0.4PO4/C is nanosheet. CV test reveals that there is two step transform process of Mn2 /Mn3 and Fe2 /Fe3 in LiMn0.6Fe0.4PO4/C cathode. Charge-discharge measurement exhibit that LiMn0.6Fe0.4PO4/C nanosheet has excellent rate capacity and cycling stability. At 5 C rate, the capacity still achieves 115.8 mAh/g after 100 cycles, and the capacity retention is 95.8%.
文章编号:     中图分类号:TM912.9 TG456    文献标志码:
基金项目:国家自然科学基金资助项目(51404002);安徽工业大学研究生创新研究基金;安徽省大学生创新创业训练计划项目(201610360157);安徽工业大学优秀创新团队项目(TD201202)。
引用文本:
吴玉荣,刘思远,岳彩波,朱彦荣,伊廷锋.LiMn0.6Fe0.4PO4/C纳米片正极材料的水热合成及其电化学性能[J].有色金属工程,2018,8(3):.

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