标题:Facile synthesis of porous ZnMnO3spherulites with a high lithium storage capability
作者:Liu, Xinru ;Zhao, Chenhao ;Zhang, He ;Shen, Qiang
作者机构:[Liu, Xinru ;Zhang, He ;Shen, Qiang ] Key Laboratory for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engin 更多
通讯作者:Zhao, Chenhao
来源:Electrochimica Acta
出版年:2015
卷:151
页码:56-62
DOI:10.1016/j.electacta.2014.11.020
摘要:In this paper, pure-phase ZnMnO3porous spherulites are uniquely synthesized through the thermal decomposition of Zn-Mn binary carbonate precursors facilely co-precipitated at room temperature, possessing an average diameter of 1.2 ± 0.3 μm and acquiring porosity with a specific surface area of 24.3 m2g-1. When tentatively applied as lithium-ion battery anodes for the first time, these porous spherulites deliver an initial discharge capacity of 1294 mAh g-1at 500 mA g-1and retain an reversible value of 879 mAh g-1over 150 cycles. By comparison, the equimolar powder mixture of nano-sized ZnO and MnO2synergistically shows a higher lithium storage capability than the two unary transition metal oxides, but lower than anode material ZnMnO3. Aside from its nanostructured characteristics, an inner atomic synergistic effect within the cubic lattices may account for the superior electrochemical performance of well-crystallized ZnMnO3.
© 2014 Elsevier Ltd. All rights reserved.
收录类别:EI
资源类型:期刊论文
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