Characteristic performance of SnO/Sn/Cu6Sn5 three-layer anode for Li-ion battery
Characteristic performance of SnO/Sn/Cu6Sn5 three-layer anode for Li-ion battery
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锂离子电池SnO/Sn/Cu6Sn5三层负极特性
DOI：
10.1016/j.electacta.2013.07.060
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发表时间：
2013-10
影响因子：
6.6
通讯作者：
Li, Li
中科院分区：
文献类型：
--
作者：
Zhao, Wenzhi;Wang, Yan;Liu, Xuan;Li, Li
为了比较不同Sn基材料作为锂离子电池负极材料的循环性能，并尽可能减少工艺条件的影响，采用一种简便的方法，在Cu基体上电沉积厚Sn膜，然后在200 °C下退火48 h，制备了SnO/Sn/Cu 6Sn 5三层膜。采用X射线衍射和扫描电子显微镜对三层薄膜的微观结构和形貌进行了表征。将Sn膜和三层膜组装成锂离子电池负极。通过充放电、循环伏安和交流阻抗谱研究了它们的电化学性能。与Sn阳极相比，SnO/Sn/Cu 6Sn 5三层阳极具有更小的SEI膜、更小的电荷转移和扩散电阻。通过对充放电曲线的分析，得到了SnO、Sn和Cu 6Sn 5相的容量。在所有的三相中，Cu 6Sn 5显示出最高的容量和容量保持率。
To compare cyclic performances of different Sn based materials as anodes for Li ion battery and minimize the influence from processing conditions, the SnO/Sn/Cu6Sn5three-layer film was prepared by a facile method of annealing the electrodeposited thick Sn film on Cu substrate at 200 °C in atmosphere for 48 h. Microstructure and morphology of the three-layer film were characterized by X-ray diffraction and SEM. Both the Sn film and three-layer film were assembled as anodes in Li-ion battery. Their electrochemical properties were studied by charge/discharge, cyclic voltammetry and ac impedance spectra. Compared with Sn anode, SnO/Sn/Cu6Sn5three-layer anode shows much smaller SEI film, charge transfer and diffusion resistance. Capacities of SnO, Sn and Cu6Sn5phases were obtained from analysis of charge/discharge curves. Among all three phases, Cu6Sn5shows both the highest capacity and capacity retention.
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