Three-dimensional nanoarchitecture of Sn-Sb-Co alloy as an anode of lithium-ion batteries with excellent lithium storage performance
Three-dimensional nanoarchitecture of Sn-Sb-Co alloy as an anode of lithium-ion batteries with excellent lithium storage performance
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三维纳米结构Sn-Sb-Co合金作为锂离子电池负极具有优异的储锂性能
DOI：
10.1039/c2jm32162a
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发表时间：
2012-01-01
影响因子：
--
通讯作者：
Sun, Shi-Gang
中科院分区：
文献类型：
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作者：
Ke, Fu-Sheng;Huang, Ling;Sun, Shi-Gang
针对锡基锂离子电池材料容量衰减快、倍率性能差的问题，采用直接电沉积法在铜纳米晶阵列上制备了一种新型纳米结构的Sn-Sb-Co合金电极。SEM图像显示了具有阵列结构的三维（3D）纳米结构的Sn-Sb-Co合金。电化学测试结果表明，三维纳米结构的Sn 54 Sb 41 Co 5合金电极在0.2C（1C = 650 mA g（-1））下循环150次后的可逆容量高达512.8mA h g（-1）.此外，3D纳米结构的Sn 54 Sb 41 Co 5阳极可以在23 C（类似于15 A g（-1））的高放电-充电速率下提供高达80次循环的高可逆容量（275 mA h g（-1））。这些优异的电化学性能归功于Sn 54 Sb 41 Co 5电极独特的纳米结构，使其成为优异的阳极材料。
A novel nanoarchitectured Sn-Sb-Co alloy electrode is reported, which was prepared by direct electrodeposition on a Cu nanoribbon array in order to target the rapidly fading capacity and the poor rate-capability issues of Sn based materials for Li-ion batteries. The SEM images indicate a three-dimensional (3D) nanoarchitectured Sn-Sb-Co alloy with an array structure. Electrochemical measurements show that the 3D nanoarchitectured Sn54Sb41Co5 alloy electrode exhibits a reversible capacity as high as 512.8 mA h g(-1) at 0.2 C (1 C = 650 mA g(-1)) after 150 cycles. Furthermore, the 3D nanoarchitectured Sn54Sb41Co5 anode can deliver a high reversible capacity (275 mA h g(-1)) up to the 80th cycle at a high discharge-charge rate of 23 C (similar to 15 A g(-1)). These outstanding electrochemical properties are attributed to the unique nanoarchitectures of the Sn54Sb41Co5 electrodes, making them an excellent anode material.