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Preparation of Flower-like Nickel-Based Bimetallic Organic Framework Electrodes for High-Efficiency Hybrid Supercapacitors
| Content Provider | MDPI |
|---|---|
| Author | Jiang, Di Wei, Chuanying Zhu, Ziyang Xu, Xiaohui Lu, Min Wang, Guangsheng |
| Copyright Year | 2021 |
| Description | Metal organic frameworks (MOFs) have been rapidly developed in the application of electrode materials due to their controllable morphology and ultra-high porosity. In this research, flower-like layered nickel-based bimetallic MOFs microspheres with different metal central ions were synthesized by solvothermal method. Compared with Ni-MOFs, the optimization of the specific capacitance of NiCo-MOFs and NiMn-MOFs was been confirmed. For example, the specific capacitance of NiCo-MOFs can reach 882 $F·g^{−1}$ at 0.5 $A·g^{−1}$ while maintaining satisfactory cycle life (the specific capacity remains 90.1% of the initial value after 3000 charge-discharge cycles at 5 $A·g^{−1}$). In addition, the NiCo-MOFs//AC HSCs, which are composed of NiCo-MOFs and activated carbon (AC), achieved a maximum energy density of 18.33 $Wh·kg^{−1}$ at a power density of 400 $W·kg^{−1}$, and showed satisfactory cycle life (82.4% after 3000 cycles). These outstanding electrochemical properties can be ascribed to the synergistic effect between metal ions, the optimized conductivity, and the unique layered stacked flower structure, which provides a smooth transmission channel for electrons/ions. In addition, this research gives a general method for the application of MOFs in the field of supercapacitors. |
| Starting Page | 1425 |
| e-ISSN | 20734352 |
| DOI | 10.3390/cryst11111425 |
| Journal | Crystals |
| Issue Number | 11 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-11-21 |
| Access Restriction | Open |
| Subject Keyword | Crystals Metal Organic Frameworks Nickel Supercapacitor |
| Content Type | Text |
| Resource Type | Article |
