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首页> 外文期刊>International Journal of Electrochemical Science >Sn-Cu Alloy Materials with Optimized Nanoporous Structure and Enhanced Performance for Lithium-Ion Batteries Prepared by Dealloying
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Sn-Cu Alloy Materials with Optimized Nanoporous Structure and Enhanced Performance for Lithium-Ion Batteries Prepared by Dealloying

机译：通过脱合金制备具有最佳纳米孔结构和增强性能的锂离子电池Sn-Cu合金材料

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Three kinds of binder-free nanoporous Sn-Cu alloys are prepared by electroplating followed byelectrochemical dealloying and tested as possible negative electrode materials for lithium-ion battery.The morphology and structure of these alloys were characterized by X-ray diffraction, scanningelectron microscopy and atomic absorption spectrophotometer. Experimental results suggest that thecomposition, pore size, size distribution, homogeneity of the alloys can be facilely controlled bychanging the ratio of main salts in the electroplating bath. The Sn content in the alloys afterelectrochemical dealloying reduces significantly and Cu6Sn5 become the main active component.However there is no obvious decrease in specific capacity. The initial specific capacities of all the-1 materials are in 480-810 mA h g range. But the capacity of as-deposited Sn-Cu alloys remain only-1 110-190 mA h g after 50 cycles, while one of the capacity of the nanoporous Sn-Cu alloys remain-1 around 400 mA h g after the same cycles. This suggests that both capacity and cycling performancecan be improved by optimizing the nanostructure of the materials using electrochemical dealloying.
机译：通过电镀，电化学脱合金制备三种无粘结剂的纳米多孔Sn-Cu合金，并作为可能的锂离子电池负极材料进行了测试。通过X射线衍射，扫描电子显微镜和原子分析对这些合金的形貌和结构进行了表征。吸收分光光度计。实验结果表明，通过改变电镀液中主盐的比例，可以方便地控制合金的组成，孔径，尺寸分布和均匀性。电化学脱合金后合金中的Sn含量显着降低，Cu6Sn5成为主要活性成分，但比容量没有明显降低。所有-1材料的初始比容量在480-810 mA h g范围内。但是，经过50个循环后，沉积态的Sn-Cu合金的容量仅保持在1 110-190 mA h g，而在相同循环后，纳米多孔Sn-Cu合金的容量之一在400 mA h g时保持在1。这表明可以通过使用电化学脱合金优化材料的纳米结构来提高容量和循环性能。

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