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Three-dimensional porous copper-tin alloy electrodes for rechargeable lithium batteries

机译:用于可充电锂电池的三维多孔铜锡合金电极

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Three-dimensional (3D) foam structure of a Cu6Sn5 alloy was fabricated via an electrochemical deposition process. The walls of the foam structure are highly porous and consist of numerous small grains. When used as a negative electrode for a rechargeable lithium battery, the CU6Sn5 samples delivered a reversible capacity of about 400 mAhg(-1) up to 30 cycles. Further, these materials exhibit superior rate capability, attributed primarily to the unique porous structure and the large surface area for fast mass transport and rapid surface reactions. For instance, at a current drain of 10 mAcm(-2) (20C rate), the obtainable capacity (220 mA hg(-1)) was more than 50 % of the capacity at 0.5 mA cm(-2) (1C rate).
机译:通过电化学沉积工艺制造了Cu6Sn5合金的三维(3D)泡沫结构。泡沫结构的壁是高度多孔的并且由许多小颗粒组成。当用作可再充电锂电池的负极时,CU6Sn5样品可提供约400 mAhg(-1)的可逆容量,最多可循环30次。此外,这些材料具有优异的速率能力,这主要归因于独特的多孔结构和大表面积,可实现快速的质量传输和快速的表面反应。例如,在10 mAcm(-2)(20C速率)的电流消耗下,可获得的容量(220 mA hg(-1))大于0.5 mA cm(-2)(1C速率)的容量的50% )。

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