3D ordered macroporous germanium fabricated by electrodeposition from an ionic liquid and its lithium storage properties
3D ordered macroporous germanium fabricated by electrodeposition from an ionic liquid and its lithium storage properties
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离子液体电沉积制备的3D有序大孔锗及其储锂性能
DOI：
10.1039/c3ta12923c
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发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Li, Yao
中科院分区：
文献类型：
--
作者：
Liu, Xin;Zhao, Jiupeng;Li, Yao
在IVA族材料中，锗具有大的理论比容量、良好的导电性和快速的锂离子扩散性，使其成为锂离子电池的替代阳极材料。纳米结构电极是目前解决体积膨胀问题和提高循环性能和倍率性能的最大焦点。采用离子液体电沉积法在室温下制备了Ge纳米粒子，并结合“硬”模板，制备了三维大孔骨架材料。3D有序大孔Ge的可逆容量为1024 mA·h·g ~（-1），在0.2C倍率下循环50次后仍保持844 mA·h·g ~（-1）。
Among the group IVA materials, germanium has a large theoretical specific capacity, good electrical conductivity and fast lithium ion diffusivity, making it an alternative anode material for Li ion batteries. Nanostructured electrodes now are the biggest focus to solve the volume expansion problem and to improve cycling and rate performance. Ionic liquid electrodeposition was used to obtain Ge nanoparticles at room temperature, and by combining with a "hard" template, 3D macroporous frameworks have been easily synthesized. 3D ordered macroporous Ge exhibits a reversible capacity of 1024 mA h g(-1) and retains a capacity of 844 mA h g(-1) after 50 cycles at a rate of 0.2 C.