高载量磷掺杂MoS₂的制备及储锌性能的研究

Preparation of High-Mass Phosphorus-Doped MoS₂ and Study of Zinc Storage Properties

使用简单的水热法制备了高载量(约为10 mg∙cm−2)的磷掺杂MoS2,通过形貌表征、电化学测试等方法证明了磷的掺杂可以扩大MoS2的层间距,提高导电性以及比容量。同时,开发了准固态电解质(PVA/ZnCl2)来代替含水电解质(Zn(CF3SO3)2),有效地解决了MoS2在水性电解质中容易溶解和结构坍塌等问题。所制备的Zn//MoS2-P电池的循环寿命也有显著提高,比容量也有了明显提升,从131 mAh∙g−1 (在含水电解质中)提高到了184 mAh∙g−1 (在准固态电解质中)以及优异的倍率性能(在1 A∙g−1下容量为65 mAh∙g−1)。

Phosphorus-doped MoS2 with high load capacity (about 10 mg∙cm−2) was prepared by a simple hydrothermal method. By means of morphology structure and electrochemical properties, the doping of phosphorus can expand the layer spacing of MoS2, improve the conductivity and specific capacity. At the same time, the quasi-solid gel electrolyte (PVA/ZnCl2) was developed to replace the aqueous electrolyte (Zn(CF3SO3)2), which effectively solved the problems of the dissolution and structure collapse of MoS2 in the aqueous electrolyte. The cycle life of the Zn//MoS2-P cells was also significantly improved, increasing the specific capacity from 131 mAh∙g−1 (in aqueous electrolyte) to 184 mAh∙g−1 (in gel electrolyte) and excellent multiplier performance (65 mAh∙g−1 at 1 A∙g−1).