Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Nano Lett. 2010 Jul 14;10(7):2433-40. doi: 10.1021/nl1005993.
We report the synthesis and electrochemical activity of gold and silver noble metals and their alloy nanowires using multiple virus clones as anode materials for lithium ion batteries. Using two clones, one for specificity (p8#9 virus) and one versatility (E4 virus), noble metal nanowires of high-aspect ratio with diameters below 50 nm were successfully synthesized with control over particle sizes, morphologies, and compositions. The biologically derived noble metal alloy nanowires showed electrochemical activities toward lithium even when the electrodes were prepared from bulk powder forms. The improvement in capacity retention was accomplished by alloy formation and surface stabilization. Although the cost of noble metals renders them a less ideal choice for lithium ion batteries, these noble metal/alloy nanowires serve as great model systems to study electrochemically induced transformation at the nanoscale. Given the demonstration of the electrochemical activity of noble metal alloy nanowires with various compositions, the M13 biological toolkit extended its utility for the study on the basic electrochemical property of materials.
我们报告了使用多种病毒克隆作为锂离子电池的阳极材料，合成和电化学活性的金和银贵金属及其合金纳米线。使用两个克隆体，一个用于特异性（p8#9 病毒），一个用于多功能性（E4 病毒），成功地合成了具有高纵横比、直径低于 50nm 的贵金属纳米线，并且可以控制颗粒尺寸、形态和组成。即使电极是由块状粉末形式制备的，生物衍生的贵金属合金纳米线也表现出对锂的电化学活性。通过合金形成和表面稳定化实现了容量保持率的提高。尽管贵金属的成本使其成为锂离子电池不太理想的选择，但这些贵金属/合金纳米线作为研究电化学诱导纳米尺度转化的理想模型系统。鉴于各种组成的贵金属合金纳米线的电化学活性的证明，M13 生物工具包扩展了其在材料基本电化学性质研究中的用途。
