La-NiCo LDH复合材料的制备及电化学性能  

Preparation and electrochemical properties of La-doped NiCo LDH composites

作　　者：李琦 李成美 刘验娇 赫文秀[1] LI Qi;LI Chengmei;LIU Yanjiao;HE Wenxiu(Chemistry and Chemical Engineering School,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学化学与化工学院,内蒙古包头014010

出　　处：《内蒙古科技大学学报》2024年第3期246-250,共5页Journal of Inner Mongolia University of Science and Technology

基　　金：内蒙古自治区科技计划项目(2020GG0151,2021GG0380)、内蒙古自治区直属高校基本科研经费项目(XM2022BT10)。

摘　　要：层状双金属氢氧化物(Layered Double Hydroxide,简称LDH)是一种优良的超级电容器电极材料。理论上La掺杂可优化这种材料的性能,但具体影响尚未被揭示。因此,采用水热法制备了La^(3+)掺杂镍钴双金属氢氧化物(La-NiCo LDH)复合材料。在此基础上,进一步采用XRD、XPS、SEM和电化学测试的方法研究了不同物质的量比La^(3+)的掺杂对La-NiCo LDH复合材料显微结构及电化学性能的影响。La^(3+)的引入使样品形貌由蜂窝状微球转变为花瓣状微球,材料的比电容得到了很好地改善。在1 A/g的电流密度下,对样品进行La^(3+)掺杂后,样品比电容提升由812 F/g至1458 F/g。同时也提升了材料的导电性能。Layered bimetallic hydroxide is an excellent electrode material for supercapacitors.La-doping can theoretically optimize the properties of such materials.However,its specific effects have not yet been revealed.Therefore,La^(3+)doped nickel-cobalt bimetallic hydroxide(La-NiCo LDH)was prepared by hydrothermal method.On this basis,the effects of La^(3+)doping amount on the microstruc-ture and electrochemical properties of La-Nico LDH were studied by XRD,XPS,SEM and electrochemical tests.The introduction of La^(3+)transforms the morphology of the sample from honeycomb microspheres to petal microspheres,and the specific capacitance of the material is greatly improved.At the current density of 1 A/g,the specific capacitance of the Ni-Co LDH material is 812 F/g.After do-ping with La^(3+),the specific capacitance of the Ni-Co LDH material is 812 F/g.The specific capacitance of the sample increases to 1458 F/g.Meanwhile,the electrical conductivity of the material is also improved.

关 键 词：镍钴双金属氢氧化物 La^(3+) 超级电容器 元素掺杂 电化学性能 

分 类 号：TB331[一般工业技术—材料科学与工程]