摘要
介绍了一个物理化学综合实验的设计,采用简单的水热合成方法在泡沫镍表面原位沉积纳米MnO2形成电极材料,利用傅里叶红外技术、X射线衍射技术、比表面积测试、扫描电子显微镜及场发射扫描电镜对产物进行结构表征与形貌分析,通过循环伏安曲线和恒电流充放电测试评价了材料的电容性能。通过测试表明,MnO2在泡沫镍表面均匀分散,所得复合物在电流密度为5mA/cm2时放电比容量达到944.2F/g,同时表现出优异的循环稳定性。实验设计中制备路线简单可控,表征方法方便易得。该实验有利于加深学生对化学电源电极材料的结构与性能的了解,有益于培养学生的创新意识和提高其综合实验能力。
The design of a comprehensive physicochemical experiment was introduced.A facile hydrothermal method was applied to in-situ deposit manganese dioxide (MnO2 )on foamed nickel and to prepare an electrode. The production was characterized by Fourier transform infrared spectroscopy (FTIR)technology,X-ray powder diffraction (XRD),Brunauer-Emmett-Teller (BET)specific surface area test,scanning electron microscopy (SEM)and field emission scanning electron microscope (FESEM)for the analyses in the aspect of structure and morphology.The experimental results indicate that MnO2 is uniformly deposited on the surface of foamed nickel.The high specific capacitance of 944.2 F/g is observed at the current density of 5 mA/cm2 and reversibility at various current rates (~100% coulombic efficiency after 1000 charge/discharge cycles).In this design,on the one hand,the synthesis method is simple and controllable.On the other hand,the characterization methods are convenient and available.Thus,students’understanding of the structure and properties of electrode materials can be deepened by doing the experiment,benefiting for their cultivation of innovation consciousness and comprehensive experimental ability.
出处
《实验技术与管理》
CAS
北大核心
2016年第2期28-33,共6页
Experimental Technology and Management
基金
国家自然科学基金项目(51303022)资助
2013年东华大学校级教学改革研究项目
院级教学改革研究项目(105-03-0007054)资助
中央高校基本科研业务费专项资金(2232015D3-17)资助
关键词
物理化学实验
电极材料
泡沫镍
二氧化锰
水热合成
电容性能
physicochemical experiment
electrode material
foamed nickel
manganese dioxide
hydrothermal method
capacitive performance
