模板法结合溶剂热法制备SnO2多孔球体

采用模板法结合溶剂热法,利用葡萄糖脱水碳化和SnCl4水解制备SnO2负极材料。XRD、FE-SEM及BET分析结果表明:SnO2为四方晶系金红石型结构,由粒径约为15 nm的零维球形纳米颗粒集合形成几何结构完整的三维多孔球体,球体直径约1～2μm,比表面积为36.41 m2/g,平均BJH孔径和孔容分别为15.8 nm和0.211 cm3/g。电化学性能分析结果表明:在0.005～2.000 V循环,SnO2材料的0.1C首次充、放电比容量分别为1 796.7 mAh/g和896.1 mAh/g,从第4次循环开始,库仑效率在90%以上;第30次0.5C循环的容量保持率为66.98%。

Preparing SnO_2 porous sphere by template method combined with solvent-thermal method

SnO2 anode material was prepared from carbonization of glucose and hydrolysis of SnCl4 by template method combined with solvent-thermal method.The results of XRD,FE-SEM and BET analyses showed that SnO2 was tetragonal rutile structure,the zero-dimensional spherical nanoparticles of about 15 nm diameter were assembled into a higher-order structure of three-dimensional porous sphere of 1～2 μm in overall dimension,the specific surface area was 36.41 m2/g,the average BJH pore diameter was 15.8 nm and the pore volume was 0.211 cm3/g.The results of electrochemical performance analysis showed that when cycled in 0.005～2.000 V,the 0.1 C initial specific charge and discharge capacity of SnO2 material was 1 796.7 mAh/g and 896.1 mAh/g,respectively,the Coulombic efficiency was above 90%,the capacity retention rate of the 30th 0.5 C cycle was 66.98%.