| Autor: |
Xu, Baohe, Lu, Na, Zhang, Bao, Qin, Haozhe, Cao, Liang, Geng, Hongbo, Ou, Xing |
| Zdroj: |
Materials Today Energy; 20220101, Issue: Preprints |
| Abstrakt: |
Structure engineering and composition regulation of carbon-based materials have become a promising strategy for dealing with the depressed kinetics and inferior structure stability in accommodating K+ion process. Herein, the component-optimal disordered carbon with “Ice Cube” architecture (C-Z@RF) has been conducted by a facile pyrolysis process of modified ZIF8. The electrochemical reaction kinetics has been boosted by the abundant active sites derived from the introduction of numerous pyridinic-N and the design of hierarchical framework, and the structure integrity is well maintained during repeated K+insertion/de-insertion process by employing the hollow architecture to restrain the stress concentration. As expected, benefitting from the synergistic effect of structure design and component control, the C-Z@RF electrode materials present a superhigh reversible capacity of 109.8 mA h g-1at 10.0 A g-1after 4000 cycles, and even can still maintain 119.2 mA h g-1at the enlarged current density of 20.0 A g-1. Above all, the investigation in this work have provided a promising perspective to exploit carbonaceous material with prominent high-rate performance and long-term lifespan for advanced PIBs. |
| Databáze: |
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