Ag原位负载催化剂的制备及表征综合实验设计

发布时间：2018-04-11 14:16

本文选题：新能源实验 + 集流体　；参考：《实验室研究与探索》2017年05期

【摘要】：设计一个关于锂空气电池催化剂的制备及其催化性能研究的综合实验。采用自交换法结合HF同步刻蚀,在集流体泡沫镍表面原位生成了Ag纳米枝晶电极材料。利用X射线衍射技术、场发射扫描电镜配接X射线谱仪对这种新型复合材料进行成分分析与形貌表征,通过恒电流放电及电化学线性伏安测试评价了材料的电化学性能。结果表明,Ag纳米枝晶在泡沫镍表面均匀分布,将其应用于锂空气电池,在电流密度为1 A/m~2时,电池的放电容量从4 774.4 mA·h/g增加到8 203.8 mA·h/g,电催化性能良好。
[Abstract]:A comprehensive experiment on the preparation and catalytic performance of lithium air battery catalyst was designed.In situ Ag nanocrystalline electrode material was formed on the surface of liquid collecting foam nickel by self exchange method combined with HF simultaneous etching.The composition and morphology of the new composite were characterized by X-ray diffraction and field emission scanning electron microscopy (SEM). The electrochemical properties of the composite were evaluated by constant current discharge and electrochemical linear voltammetry.The results show that the nanocrystalline Ag nanoparticles are uniformly distributed on the surface of nickel foam. When the current density is 1 A / m ~ 2, the discharge capacity of the battery increases from 4 774.4 Ma / h / g to 8 203.8 Ma h / g, and the electrocatalytic performance is good.
【作者单位】：西安科技大学材料科学与工程学院;西安科技大学党委学工部;
【基金】：国家自然科学基金青年科学基金项目(51602254) 西安科技大学校级培育基金项目(2014003);西安科技大学博士启动金项目(2015QDJ048)
【分类号】：G642.423;O643.36-4;TM911.41-4

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