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首页> 外文期刊>RSC Advances >A self-assembled Si/SWNT 3D-composite-nanonetwork as a high-performance lithium ion battery anode
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A self-assembled Si/SWNT 3D-composite-nanonetwork as a high-performance lithium ion battery anode

机译：自组装Si / SWNT 3D复合纳米网络作为高性能锂离子电池阳极

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摘要

In this work, we have prepared a 3D-composite-nanonetwork material consisting of a single walled carbon nanotube (SWNT) network and Si nanosphere embedded elements, through an electrostatic induced self-assembly process and the following film transfer technique. Negatively charged acid-functionalized SWNTs and positively charged surface-modified Si nanospheres composed a highly dispersed system, which was key to the fabrication of a self-assembled active material film. After transferring it to the Cu foil substrate by a novel film transfer technique, an integrated anode for lithium ion batteries (LIBs) was obtained without using binders or conductive additives, and exhibited excellent electrochemical performance. The continuous 3D conductive network consisting of SWNTs provided a rapid electronic transport pathway, which was able to counteract the conductivity decline caused by the formation of a solid electrolyte interface layer, thus ensuring a superior rate capability and cycling stability. This combined process of self-assembly and film transfer would provide a new idea for the design and preparation of LIB electrodes, especially those which are restricted by low conductivity and large volume change during cycling.
机译：在这项工作中，我们通过静电感应自组装过程和以下膜转移技术，制备了由单壁碳纳米管（SWNT）网络和Si纳米球嵌入元素组成的3D复合纳米网络材料。带负电的酸官能化SWNT和带正电的表面改性Si纳米球组成了高度分散的体系，这对于制造自组装活性材料膜至关重要。通过新颖的膜转移技术将其转移至Cu箔基板后，无需使用粘合剂或导电添加剂即可获得锂离子电池（LIB）集成阳极，并具有出色的电化学性能。由SWNT组成的连续3D导电网络提供了快速的电子传输路径，该路径能够抵消由于形成固体电解质界面层而导致的电导率下降，从而确保了出色的倍率能力和循环稳定性。这种自组装和膜转移的结合过程将为LIB电极的设计和制备提供新思路，尤其是那些在循环过程中电导率低且体积变化大的电极。

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