Zhang Da, Tang Yuanzheng, Zhang Chuanqi, Dong Qianpeng, Song Wenming, He Yan
College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China.
Nanomaterials (Basel). 2021 Nov 21;11(11):3138. doi: 10.3390/nano11113138.
Tin dioxide (SnO)-based materials, as anode materials for lithium-ion batteries (LIBs), have been attracting growing research attention due to the high theoretical specific capacity. However, the complex synthesis process of chemical methods and the pollution of chemical reagents limit its commercialization. The new material synthesis method is of great significance for expanding the application of SnO-based materials. In this study, the SnO/carbon nanotube nanonests (SnO/CNT NNs) composites are synthesized in one step by direct current (DC) arc-discharge plasma; compared with conventional methods, the plasma synthesis achieves a uniform load of SnO nanoparticles on the surfaces of CNTs while constructing the CNTs conductive network. The SnO/CNT NNs composites are applied in LIBs, it can be found that the nanonest-like CNT conductive structure provides adequate room for the volume expansion and also helps to transfer the electrons. Electrochemical measurements suggests that the SnO/CNT NNscomposites achieve high capacity, and still have high electrochemical stability and coulombic efficiency under high current density, which proves the reliability of the synthesis method. This method is expected to be industrialized and also provides new ideas for the preparation of other nanocomposites.
二氧化锡（SnO）基材料作为锂离子电池（LIBs）的负极材料，因其高理论比容量而受到越来越多的研究关注。然而，化学方法复杂的合成过程以及化学试剂的污染限制了其商业化。新材料合成方法对于拓展SnO基材料的应用具有重要意义。在本研究中，通过直流（DC）电弧放电等离子体一步合成了SnO/碳纳米管纳米巢（SnO/CNT NNs）复合材料；与传统方法相比，等离子体合成在构建CNTs导电网络的同时，实现了SnO纳米颗粒在CNTs表面的均匀负载。将SnO/CNT NNs复合材料应用于LIBs，可以发现纳米巢状的CNT导电结构为体积膨胀提供了足够的空间，也有助于电子转移。电化学测量表明，SnO/CNT NNs复合材料具有高容量，并且在高电流密度下仍具有高电化学稳定性和库仑效率，这证明了合成方法的可靠性。该方法有望实现工业化，也为其他纳米复合材料的制备提供了新思路。
