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Facile Synthesis of $Ni_{x}Co_{3−x}S_{4}$ Microspheres for High-Performance Supercapacitors and Alkaline Aqueous Rechargeable NiCo-Zn Batteries
| Content Provider | MDPI |
|---|---|
| Author | Zhang, Daojun Jiang, Bei Li, Chengxiang Bian, Hao Liu, Yang Bu, Yingping Zhang, Renchun Zhang, Jingchao |
| Copyright Year | 2022 |
| Description | Electrochemical energy storage devices (EESDs) have caused widespread concern, ascribed to the increasing depletion of traditional fossil energy and environmental pollution. In recent years, nickel cobalt bimetallic sulfides have been regarded as the most attractive electrode materials for super-performance EESDs due to their relatively low cost and multiple electrochemical reaction sites. In this work, NiCo-bimetallic sulfide $Ni_{x}Co_{3−x}S_{4}$ particles were synthesized in a mixed solvent system with different proportion of Ni and Co salts added. In order to improve the electrochemical performance of optimized $Ni_{2.5}Co_{0.5}S_{4}$ electrode, the $Ni_{2.5}Co_{0.5}S_{4}$ particles were annealed at 350 °C for 60 min (denoted as $Ni_{2.5}Co_{0.5}S_{4}$-350), and the capacity and rate performance of $Ni_{2.5}Co_{0.5}S_{4}$-350 was greatly improved. An aqueous NiCo-Zn battery was assembled by utilizing $Ni_{2.5}Co_{0.5}S_{4}$-350 pressed onto Ni form as cathode and commercial Zn sheet as anode. The NiCo-Zn battery based on $Ni_{2.5}Co_{0.5}S_{4}$-350 cathode electrode delivers a high specific capacity of 232 mAh $g^{−1}$ at 1 A $g^{−1}$ and satisfactory cycling performance (65% capacity retention after 1000 repeated cycles at 8 A $g^{−1}$). The as-assembled NiCo-Zn battery deliver a high specific energy of 394.6 Wh $kg^{−1}$ and long-term cycling ability. The results suggest that $Ni_{2.5}Co_{0.5}S_{4}$-350 electrode has possible applications in the field of alkaline aqueous rechargeable electrochemical energy storage devices for supercapacitor and NiCo-Zn battery. |
| Starting Page | 2994 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano12172994 |
| Journal | Nanomaterials |
| Issue Number | 17 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-08-30 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Electrochemistry Nixco3−xs4 Structures Micro/nanostructures Supercapacitors Ni-zn Batteries |
| Content Type | Text |
| Resource Type | Article |
