Department of Chemical Engineering, Texas Materials Institute, Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, Austin, Texas 78712-1062, USA.
ACS Appl Mater Interfaces. 2012 Sep 26;4(9):4658-64. doi: 10.1021/am3010253. Epub 2012 Aug 28.
Solution-grown germanium (Ge) nanowires were tested as high capacity anodes in lithium ion (Li-ion) batteries. Nanowire films were formulated and cast as slurries with conductive carbon (7:1 Ge:C w/w), PVdF binder and 1.0 M LiPF(6) dissolved in various solvents as electrolyte. The addition of fluorethylene carbonate (FEC) to the electrolyte was critical to achieving stable battery cycling and reversible capacities as high as 1248 mA h g(-1) after 100 cycles, which is close to the theoretical capacity of 1,384 mA h g(-1). Ge nanowire anodes also exhibited high rate capability, with reversible cycling above 600 mA h g(-1) for 1200 cycles at a rate of 1C. The batteries could also be discharged at 10C with a capacity of 900 mA h g(-1) when charged at 1C.
溶液生长的锗（Ge）纳米线被测试作为锂离子（Li-ion）电池的高容量阳极。纳米线薄膜被配制成浆料，并与导电碳（7：1 Ge：C 重量比）、聚偏二氟乙烯（PVdF）粘合剂以及 1.0 M 的 LiPF(6)一起溶解在各种溶剂中作为电解质。在电解质中添加氟代碳酸乙烯酯（FEC）对于实现稳定的电池循环和高达 100 次循环后 1248 mA h g(-1)的可逆容量至关重要，这接近 1384 mA h g(-1)的理论容量。锗纳米线阳极还表现出高倍率性能，在 1C 的倍率下进行 1200 次循环时，可逆循环超过 600 mA h g(-1)。当以 1C 的速度充电时，电池也可以以 10C 的速度放电，容量为 900 mA h g(-1)。
