Both MOFs-derived Fe-Co-Ni ternary hydroxide positive and Fe2O3/reduced graphene oxide negative electrode for asymmetric supercapacitors

被引：0

作者：

Huang, Mohan ^{[1
]}

Zhao, Kun ^{[1
]}

Bai, Zhiying ^{[1
]}

He, Dawei ^{[1
]}

He, Jiaqi ^{[2
]}

Wang, Yongsheng ^{[1
]}

机构：

[1] Key Laboratory of Luminescence and Optical Information, Ministry of Education, Insti-tute of Optoelectronic Technology, Beijing Jiaotong University, Beijing,100044, China

[2] College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing,100029, China

来源：

Journal of Colloid and Interface Science | 2022年 / 623卷

基金：

中国国家自然科学基金;

关键词：

Asymmetric supercapacitor - Fe-co-ni-OH positive electrode - Fe2O3/RGO-1 negative electrode - MIL-88a - Negative electrode - Performance - Positive electrodes - Reduced graphene oxides - Spindle-like structure of the surface growth nanosheet - Surface growth;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

To design and construct high-performance asymmetric supercapacitors (ASC), we use the same Fe-based metal-organic framework (MIL-88A) as the precursor for the first time to prepare iron-cobalt-nickel ternary metal hydroxides (Fe-Co-Ni-OH) and Fe2O3 compounded with reduced graphene oxide (Fe2O3/RGO-1). As a positive electrode, Fe-Co-Ni-OH has a specific capacitance of 1065 F g−1 at 1 A g−1 and exhibits excellent rate performance and cycle stability due to its unique spindle-like structure of the surface growth nanosheets and the synergistic effect between the three metals. The introduction of RGO effectively connects the independent spindle-like Fe2O3 and enhances the conductivity and structural stability of the material. So that the Fe2O3/RGO-1 negative electrode has a specific capacitance of 734 F g−1 at 1 A g−1, and its cycle stability is significantly improved compared with the single Fe2O3 (increasing from 64 % to 85 %). The constructed Fe-Co-Ni-OH//Fe2O3/RGO-1 ASC possesses a satisfactory energy density of 43.11 Wh kg−1 at a power density of 800 W kg−1, which is superior to parts constructed with similar material compositions in the same period. This research provides a new perspective for developing high-performance, low-cost, and environmentally friendly green energy storage devices. © 2022 Elsevier Inc.

引用

页码：1160 / 1171