Automotive Battery Development, Energy Solutions, LG Chem, Daejeon, 34122, Republic of Korea.
Nanotechnology. 2019 Jul 5;30(27):275603. doi: 10.1088/1361-6528/ab0aa1. Epub 2019 Feb 26.
Germanium nanoparticles were synthesized and subjected to study as anode materials for lithium ion batteries and sodium ion batteries. Laser pyrolysis of GeH was used to produce germanium nanoparticles and the average diameter of these nanoparticles was easily controlled by regulating sensitizer gas flow rates during the process. 60 and 10 nm diameter nanoparticles were synthesized and micron-size powder was purchased and these three pure germanium powder samples were tested as the anode materials of lithium ion batteries and sodium ion batteries in terms of cycle retention, long term cycles and the kinetics of reactions. Experimental results showed that the smallest powder sample which is synthesized, average 10 nm, exhibited excellent performances in both kinds of batteries. According to the results, the characteristics of batteries improved as the size of germanium powder decreased consistently. Pure germanium was thoroughly investigated as an anode of metal-ion batteries with regard to its powder size. The experimental data and synthesis approach of germanium nanoparticles suggested in this research would be a good example for the utilization of elemental germanium in high performance batteries.
合成了锗纳米颗粒，并将其作为锂离子电池和钠离子电池的阳极材料进行了研究。通过 GeH 的激光热解来制备锗纳米颗粒，并且通过在该过程中调节敏化剂气体流速，可以很容易地控制这些纳米颗粒的平均直径。合成了 60nm 和 10nm 直径的纳米颗粒，并购买了微米级的粉末，将这三种纯锗粉末样品作为锂离子电池和钠离子电池的阳极材料进行了循环保持率、长期循环和反应动力学的测试。实验结果表明，合成的最小粉末样品，平均粒径为 10nm，在两种电池中均表现出优异的性能。根据结果，随着锗粉末尺寸的减小，电池的特性持续改善。通过研究纯锗作为金属离子电池的阳极，全面研究了其粉末尺寸。本研究中提出的锗纳米颗粒的实验数据和合成方法将为元素锗在高性能电池中的利用提供一个很好的范例。
