Epur Rigved, Ramanathan Madhumati, Datta Moni K, Hong Dae Ho, Jampani Prashanth H, Gattu Bharat, Kumta Prashant N
Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA.
Nanoscale. 2015 Feb 28;7(8):3504-10. doi: 10.1039/c4nr04288c.
A novel electrode fabrication technique involving a manual scribing action of vertically aligned silicon coated multiwall carbon nanotubes (VASCNTs) on a copper foil have been developed as a viable approach to Li-ion battery electrodes. The scribed electrodes were prepared without the use of any conductive additives and binders, and they were directly assembled in a coin cell. These 'binder-less' scribed Si-CNT electrodes exhibited a very high discharge capacity in excess of 3000 mA h g(-1) and a low first cycle irreversible loss (FIR) (19%). In addition, the electrodes also showed good cyclability with capacity retention of 76% at the end of 50 cycles corresponding to a fade rate of 0.48% loss per cycle rendering the technique attractive for suitable Li-ion applications.
一种新颖的电极制造技术已被开发出来，该技术涉及在铜箔上对垂直排列的硅包覆多壁碳纳米管（VASCNTs）进行手动划刻操作，这是一种用于锂离子电池电极的可行方法。划刻电极的制备无需使用任何导电添加剂和粘合剂，并且它们被直接组装在硬币电池中。这些“无粘合剂”的划刻硅碳纳米管电极表现出非常高的放电容量，超过3000 mA h g(-1)，并且首次循环不可逆损失（FIR）较低（19%）。此外，电极还显示出良好的循环性能，在50次循环结束时容量保持率为76%，对应于每循环0.48%的衰减率，这使得该技术对合适的锂离子应用具有吸引力。
