Advanced electrochemical performance of ZnMn2O4/N-doped graphene hybrid as cathode material for zinc ion battery
| Autor: | Xiao Zeng, Haigang Qin, Zhanhong Yang, Jinlei Meng, Linlin Chen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Battery (electricity)
Nanocomposite Materials science Renewable Energy Sustainability and the Environment Graphene Energy Engineering and Power Technology Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Cathode Energy storage 0104 chemical sciences law.invention X-ray photoelectron spectroscopy Chemical engineering law Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Power Sources. 425:162-169 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2019.04.010 |
| Popis: | Rechargeable aqueous zinc ion batteries are considered as a good substitute for large-scale energy storage due to their cost-effectiveness, materials abundance and safety. However, suitable cathode materials with high capacity and long cycling stability are still rare. Herein, we propose the first use of ZnMn2O4/N-doped graphene nanocomposite as cathode material, which exhibits a maximum discharge capacity of 221 mAh g−1 at 100 mA g−1, and ultralong cycle life with 97.4% capacity retention after 2500 cycles at 1000 mA g−1. The outstanding performance is attributed to the synergistic effect of superfine ZnMn2O4 nanoparticles (21 nm) that provide rapid surface capacitive reaction and short electronic/ion transport path lengths, as well as the highly conductive N-doped graphene medium that could facilities the fast electronic transport and stabilizes the composite structure to tolerate volume expansion during charge/discharge process. Significant insight into the zinc ion storage mechanism is confirmed by galvanostatic intermittent titration technique, ex-situ X-ray diffraction, and X-ray photoelectron spectroscopy characterizations. The long-term stability, high specific capacity together with the facile preparation method propose the ZnMn2O4/N-doped graphene hybrid a new class of competitive cathode material for zinc ion battery. |
| Databáze: | OpenAIRE |
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