摘要
采用溶剂热方法制备出Co-MOF前驱体,通过Ni^(2+)水解刻蚀前驱体得到空心NiCo-层状双氢氧化合物(LDH)材料,再将其高温煅烧硫化得到NiCo_(2)S_(4)材料。借助金属有机框架的特性使得NiCo_(2)S_(4)材料有着更加优异的性能。电化学数据表明,NiCo_(2)S_(4)材料1 A·g^(−1)的电流密度下具有204.8 mA·h·g^(−1)(1843.6 F·g^(−1))的高比容量,当电流密度增加到10 A·g^(−1)时,其容量依然有着最初的50.9%。最后,以活性炭为负极,NiCo_(2)S_(4)材料为正极组装成为了混合型超级电容器,混合超级电容器(HSC)装置在800 W·kg^(−1)的功率密度下有着38 W·h·kg^(−1)的能量密度并且在10 A·g^(−1)的电流密度下循环5000圈后依然有着71.4%的容量保持率。
The Co-MOF precursor was prepared by solvothermal method,and the hollow NiCo-layered double hydroxides(LDH)material was obtained by hydrolyzing and etching the precursor with Ni^(2+),and then NiCo_(2)S_(4)material was obtained by high temperature calcination and sulfurization.The properties of the metal-organic framework make the NiCo_(2)S_(4)material have more excellent performance.The electrochemical data show that the NiCo_(2)S_(4)material has a high specific capacity of 204.8 mA·h·g^(−1)(1843.6 F·g^(−1))at a current density of 1 A·g^(−1),and when the current density is increased to 10 A·g^(−1),its capacity is still 50.9%of the initial capacity.Finally,a hybrid supercapacitor was assembled using activated carbon as the negative electrode and NiCo_(2)S_(4)material as the positive electrode,and the hybrid supercapacitor(HSC)device had an energy density of 38 W·h·kg^(−1)at a power density of 800 W·kg^(−1)and a capacity retention rate of 71.4%after 5000 cycles at a current density of 10 A·g^(−1).
作者
王聪源
喻青松
李智铭
白京陇
魏智强
WANG Congyuan;YU Qingsong;LI Zhiming;BAI Jinglong;WEI Zhiqiang(School of Science,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《复合材料学报》
北大核心
2025年第7期3793-3803,共11页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(52268042)
甘肃省自然科学基金(22JR5RA253)。
