作　　者： (张凯）; (刘勇）;

机构地区： 青岛科技大学化学与分子工程学院

出　　处： 《青岛科技大学学报（自然科学版）》 2017年第S1期150-153,160,共5页

摘　　要： 采用两步溶剂热法在无辅助剂的条件下首先合成了表面光滑的,直径在450~550nm之间的Zn-Co前驱物纳米微球。用硫代乙酰胺为硫源,经过溶剂热之后形成了Zn_(0.76)Co_(0.24)S纳米微球,并用X射线衍射、扫描电镜分析了其组成和形貌结构。当用作锂离子电池负极材料时,在0.1A·g^(-1)的电流密度下循环100次后比容量为208mAh·g^(-1),且有不断上升的趋势;即使在1A·g^(-1)的电流密度下循环1 000次后比容量仍能稳定在230mAh·g^(-1),展现了良好的倍率性能和循环性能。 Zn-Co precursornano-microspheres with a diameter of 450~550nm were synthesized by solvothermal method without any auxiliary.In the presence of thioacetamide,ZnZn_(0.76)Co_(0.24)S nano-microspheres were formed by solvothermal synthesis and the phase composition and morphology were analyzed by X-ray diffraction and scanning electron microscopy.Serving as lithium-ion battery electrodes,the specific capacity of 208mAh·g^(-1) is obtained and there is a rising trend.Even after 1000 cycles at a current density of 1 000mA·g^(-1),the specific capacity can be stabilized at 230mAh·g^(-1),showing excellentrate capability and cycle performance.

关 键 词： 锂离子电池 负极材料 两步溶剂热法 纳米微球