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通过简单的水热法以及随后的碳化制备出ZnO纳米材料,然后采用熔融吸附法将S渗入到ZnO纳米材料中制备出S/ZnO复合正极材料。用扫描电镜和X射线衍射仪来表征材料的结构和形貌,结果表明,ZnO基体由30~60nm的小颗粒聚集在一起组成微米级的薄片构成。电化学性能测试表明,在电流密度为335mA/g时,复合材料的首次放电比容量为1190mAh/g;在电流密度为500mA/g时,复合材料经过100次循环后放电比容量为516mAh/g,库伦效率为96%。
ZnO nanomaterials were prepared by simple hydrothermal method and subsequent carbonization, and S / ZnO composite cathode material was prepared by infiltrating S into ZnO nanomaterials by melt-adsorption method. The structure and morphology of the material were characterized by scanning electron microscopy and X-ray diffractometry. The results showed that the ZnO matrix consisted of small particles of 30-60 nm aggregated to form micro-scale sheets. The results of electrochemical tests showed that the initial discharge capacity of the composites was 1190mAh / g at a current density of 335mA / g. The discharge capacity of the composites was 516mAh / g after 100 cycles at a current density of 500mA / g , Coulomb efficiency is 96%.