Preparation and electrochemical performance of AgxLi1−xV3O8
Preparation and electrochemical performance of AgxLi1−xV3O8
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DOI：
10.1016/j.jallcom.2008.04.066
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发表时间：
2009-03
影响因子：
6.2
通讯作者：
Junli Sun;Lifang Jiao;H. Yuan;Li Liu;Xin Wei;Yanli Miao;Lin Yang;Yong-mei Wang
中科院分区：
文献类型：
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作者：
Junli Sun;Lifang Jiao;H. Yuan;Li Liu;Xin Wei;Yanli Miao;Lin Yang;Yong-mei Wang
本文报道了可充锂离子电池正极材料掺银LiV 3 O 8的制备。以V2 O 5湿凝胶、LiOH·H2O和AgNO 3为原料，采用溶胶-凝胶法和低温煅烧法合成了纳米粉体。采用X射线衍射（XRD）对产物进行了表征，并采用恒流充放电、循环伏安和交流阻抗等技术研究了其作为正极材料的电化学行为。实验结果表明，掺银LiV 3 O 8正极材料的首次放电容量比未掺银LiV 3 O 8正极材料的首次放电容量大。其中Ag掺杂的LiV 3 O 8电极，尤其是Ag0.04Li0.96V3O8电极表现出最好的长寿命循环性能。所有掺杂的粉末在2.6V平台效率下显示出更好的稳定性，这是由于它们更稳定的电池阻抗。
We report here the preparation of Ag-doped LiV3O8for use as a cathode material in rechargeable lithium ion batteries. Synthesis was carried out by sol–gel methods and low temperature calcination using V2O5wet gel, LiOH·H2O, and AgNO3as raw materials. The product was characterized by X-ray diffraction (XRD), and its electrochemical behavior as a cathode material was studied by galvanostatic charge–discharge, cyclic voltammetry, and ac impedance techniques. The experimental results show that Ag-doped LiV3O8cathodes have greater initial discharge capacity than undoped cathode. And those Ag-doped LiV3O8electrodes, especially Ag0.04Li0.96V3O8, show the best long-life cycling performance. All of the doped powders show better stability at the 2.6V plateau efficiency, due to their more stable cell impedance.