SnO2-MoO3-x/CNTs纳米复合材料在锂离子电池负极中的性能

Performance of SnO2-MoO3-x/CNTs nanocomposites in anodes of lithium-ion batteries

为了改善SnO2-MoO3-x纳米复合材料在锂离子电池负极中的性能,通过水热法制得SnO2-MoO3-x/CNTs纳米复合材料,并研究CNTs的含量对纳米复合材料性能的影响;通过XRD与SEM对所得纳米复合材料进行表征,将材料组装为扣式电池,利用电化学工作站、蓝电电池测试系统等进行电化学性能测试。结果表明:CNTs的加入可以有效减小SnO2-MoO3-x纳米复合材料表面团聚现象,对纳米复合材料的电化学性能方面有明显的改善;当CNTs的加入质量分数为15%时,SnO2-MoO3-x/CNTs纳米复合材料的电化学性能最好,在100圈循环后仍然具有532.6 mA·h/g的放电比容量,库伦效率高达99.0%。

In order to improve the performance of SnO2-MoO3-x nanocomposites in the anode of lithium-ion batteries,SnO2-MoO3-x/CNTs nanocomposites were prepared by hydrothermal method,and the effect of different CNTs content on the performance of nanocomposites is studied.The obtained nanocomposite materials were characterized by XRD and SEM,the materials were assembled into button batteries,and electrochemical performance tests were performed using an electrochemical workstation,a blue battery test system,etc.The results show that the addition of CNTs can effectively reduce the surface agglomeration of SnO2-MoO3-x nanocomposites and significantly improve the electrochemical performance of nanocomposites.When the addition amount of CNTs is 15%,the electrochemical performance of SnO2-MoO3-x/CNTs nanocomposite is the best.It has a discharge specific capacity of 532.6 mA·h/g after 100 cycles,and the Coulombic efficiency is as high as 99.0%.