Silicon-Copper Helical Arrays for New Generation Lithium Ion Batteries.
Silicon-Copper Helical Arrays for New Generation Lithium Ion Batteries.
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DOI：
10.1021/acs.nanolett.5b02522
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发表时间：
2015-09
期刊：
影响因子：
10.8
通讯作者：
B. Polat;O. Keles;K. Amine
中科院分区：
文献类型：
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作者：
B. Polat;O. Keles;K. Amine
螺旋阵列（含10个原子% Cu）具有3130 mAh g（-1）和83%的柱效率，并且在第100次循环后保持83%的初始放电容量。螺旋阵列之间均匀分布的间隙适应循环时的高体积变化，铜原子形成导电网络以缓冲电极中产生的机械应力，同时最大限度地减少Si的电化学团聚。此外，离子辅助被认为可以增强底部螺旋的密度，从而增加附着力。
The helical array (with 10 atom % Cu) exhibits 3130 mAh g(-1) with 83% columbic efficiency and retains 83% of its initial discharge capacity after 100th cycle. Homogeneously distributed interspaces between the helical arrays accommodate high volumetric changes upon cycling and copper atoms form a conductive network to buffer the mechanical stress generated in the electrode while minimizing electrochemical agglomeration of Si. Also, ion assistance is believed to enhance the density of the helices at the bottom thus increasing the adhesion.