The NiFe2O4/NiCo2O4/GO composites electrode material derived from dual-MOF for high performance solid-state hybrid supercapacitors
The NiFe2O4/NiCo2O4/GO composites electrode material derived from dual-MOF for high performance solid-state hybrid supercapacitors
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DOI：
10.1016/j.colsurfa.2020.125650
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发表时间：
2021-01-20
影响因子：
5.2
通讯作者：
Tian, Xuefeng
中科院分区：
文献类型：
--
作者：
Pan, Jing;Li, Shaobin;Tian, Xuefeng
基于金属有机骨架(MOF)的衍生物为构建高性能超级电容器电极材料提供了一个灵活的平台。本文以双金属氧化物为先驱体，成功地制备了新型NiFe2O4/NiCo2O4/GO复合材料。NiFe2O4/NiCo2O4/GO复合材料形成了特殊的结构形态，具有较大的比表面积。复合电极材料表现出优异的1A/g比容量为661.6 C/g(1470F/g)，优良的倍率性能(从1~20A/g，比容量下降约38%)和优异的长循环寿命(3000次循环容量保持率为89.9%)。此外，还以NiFe2O4/NiCo2O4/GO为正极，以活性碳为负极，组成了不对称超级电容器。在373.3~1.45V的电压范围内，电池的比容量为1Ag/g，最大能量密度为109Wh kg(-)1，功率密度为1051.17 W kg(-1)。此外，NiFe2O4/NiCo2O4/GO//AC具有优异的循环稳定性(1000次循环后容量保持率为90.7%)，在储能转换领域具有潜在的应用前景。
Metal-organic frameworks (MOFs)-based derivatives provide a flexible platform for constructing high performance supercapacitors as electrode materials. Herein, a novel NiFe2O4 /NiCo2O4/GO composites has been successfully prepared by dual-MOF as precursor. The NiFe2O4 /NiCo2O4/GO composite formed a special structural morphology providing a large surface area. The composite electrode material exhibited an excellent specific capacity of 661.6 C/g (1470 F/g) at 1 A/g, excellent rate capability (from 1 to 20 A/g the specific capacity decreases about 38 %) and outstanding long cyclic life (89.9 % capacity retention after 3000 cycles). Moreover, an asymmetric supercapacitor was composed of NiFe2O4 /NiCo2O4/GO and activated carbon as positive electrode and negative electrode, respectively. Meanwhile, ASC exhibited a specific capacity of 373.3 C/g at 1A/g in a potential range from 0 to 1.45 V, it showed the maximum energy density of ASC equal to 109 Wh kg(-)1 at a power density of 1051.17 W kg(-1). In addition, the NiFe2O4 /NiCo2O4/GO//AC has an outstanding cycling stability (90.7 % capacitance retention after 1000 cycles), which makes it a potential application for in the field of energy storage-conversion application.