Low temperature synthesis of flower-like ZnMn2O4 superstructures with enhanced electrochemical lithium storage
Low temperature synthesis of flower-like ZnMn2O4 superstructures with enhanced electrochemical lithium storage
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DOI：
10.1016/j.jpowsour.2009.06.043
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发表时间：
2009-12-01
影响因子：
9.2
通讯作者：
Zhang, Lizhi
中科院分区：
文献类型：
--
作者：
Xiao, Lifen;Yang, Yanyan;Zhang, Lizhi
在这个通讯中，花状的四方ZnMn2O4上部结构是通过一个简单的低温溶剂热过程合成的。表征表明，这些ZnMn2O4超结构结晶良好，纯度高。该产品显示出763 mAh g（-1）的初始电化学容量，并在50次循环后保持626 mAh g（-1）的稳定容量。其稳定容量明显高于聚合物热解法制备的纳米晶ZnMn2O4。研究发现，制备的花状ZnMn2O4材料具有较高的容量保留率，这可归因于其三维超结构特性。本研究表明，溶剂热合成的花状ZnMn2O4是一种很有前途的锂离子电池负极材料。(C) 2009 Elsevier B.V.版权所有
In this communication, flower-like tetragonal ZnMn2O4 superstructures are synthesized by a facile low temperature solvothermal process. Characterizations show that these ZnMn2O4 superstructures are well crystallized and of high purity. The product exhibits an initial electrochemical capacity of 763 mAh g(-1) and retains stable capacity of 626 mAh g(-1) after 50 cycles. Its stable capacity is significantly higher than that of nanocrystalline ZnMn2O4 synthesized by a polymer-pyrolysis method. It is found that the higher capacity retention can be attributed to three-dimensional superstructural nature of the as-prepared flower-like ZnMn2O4 material. This study suggests that the solvothermally synthesized flower-like ZnMn2O4 is a promising anode material for lithium-ion batteries. (C) 2009 Elsevier B.V. All rights reserved.