摘要
以钼酸钠和硫代乙酰胺为原料,水为溶剂,采用水热法制备出具有优异电化学性能的花瓣状MoS_2纳米结构。研究了制备过程中反应温度、时间对产物形貌及电化学性能的影响。利用X射线衍射(XRD)、扫描电子显微镜(SEM)对产物的微观结构和形貌进行了表征,并对其电化学性能及反应过程机理进行了研究。结果表明:在水热温度为200℃,反应时间为28h条件下,所制备产物的结晶性最好,组成花瓣状的片层结构堆垛最为有序;以该花瓣状MoS_2作为铝离子电池正极材料,在充放电电流密度为10 mA·g^(-1)时,首次放电容量达到127.8mA·h·g^(-1),循环80圈后,其放电容量依然保持在44.4mA·h·g^(-1),上述结果表明,所制备产物具有优异的电化学性能和良好的循环稳定性。
In this paper,petals-like structured MoS2 with excellent electrochemical performance were synthesized by hydrothermal method using sodium molybdate and thioacetamide as a raw materials.The effect of different reaction conditions such as temperature,reaction time on the product morphology and the electrochemical properties were studied.The microstructure and morphology of the MoS2 were characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,and the electrochemistry property and mechanism was studied.The result indicated that samples with the best crystallinity and stacking ordering could be synthesized at 200 ℃for 28 h.The MoS2 as the new cathode of aluminum batterydelivers an initial high discharge capacity of 127.8 mA·h·g^（-1） at a current 10 mA·g^（-1） and the discharge capacity remains 44.4 mA·h·g^（-1） after 80 cycles,which showing good capacity and cycling performance.
作者
张弘
李镇江
ZHANG Hong;LI Zhenjiang(a.College of Electromechanical Engineerin;b.College of Sino German Science and Technology Qingdao University of Science and Technology,Qingdao 266061,China)
出处
《青岛科技大学学报（自然科学版）》
CAS
2018年第4期47-52,共6页
Journal of Qingdao University of Science and Technology:Natural Science Edition
基金
国家自然科学基金项目(50972063
51572137)
关键词
水热法
花瓣状MoS2
铝离子电池
循环稳定性
hydrothermal method
petals like structure MoS2
aluminum battery
cycle stability
