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MO@M’M₂O₄/N-C杂化纳米棒的锂离子电池负极性能研究

Study of MO@M’M₂O₄/N-C hybrid nanorods as anodes of lithium ion batteries

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【Author】 Ming Zhong;Donghui Yang;Lingjun Kong;Chenchao Xie;Yinghui Zhang;Xian He Bu;School of Material Science and Engineering,Nankai University;Department of Chemistry,Nankai University;

【机构】南开大学材料科学与工程学院；南开大学化学学院；

【摘要】金属氧化物因其高理论比容量在锂离子电池负极材料制备上展现出诱人前景[2]。但其固有的低导电性、高极化率、低稳定性和宽电势窗口等缺点严重影响其性能表现。本文中我们制备了一种新型一维MO₂/MOF杂化纳米棒,并以此为前驱体,通过高温碳化得到核—壳结构的MO@M’M₂O₄/N-C纳米棒复合材料,并对其锂离子电池负极性能进行了评估,结果表明:相比于纯金属氧化物（MO_x）,MO@M’M₂O₄/N-C复合材料具有更高的比容量、更好的稳定性以及更优的倍率性能。更多还原

【Abstract】 Metal oxides（MO_x） are promising anode materials for lithium ion batteries,but with generally mediocre performance due to their intrinsic low conductivity,high polarization,poor stability and large potential window.Here,we report a yolk-shell MO@M’M₂O₄/N-C hybrid nanorods manufactured via one-step carbonization of a MO/MOF hybrid precursor.Our study reveal that the MO@M’M₂O₄/N-C has an improved reversible capacity,excellent cyclability as well as excellent rate capability as anodes material of lithium ion batteries,relative to those non-N-C shelled metal oxides（MO_X）.更多还原