| 초록 |
Zinc ion batteries suffer from insufficient cycling stability due to the uneven Zn deposition/dissolution process. To address this issue, we report the polymer of intrinsic microporosity (PIM-1) as an ion regulating layer, which can guide uniform Zn deposition. It is revealed that the unique pore structure of PIM-1 is a key factor to alleviate random deposition problem of Zn. It is also found that PIM-1 can reduce overpotential by altering the solvation structure of Zn ion and electrochemical environment of Zn metal. As a result, PIM-1 coating significantly improves the cyclability of Zn, allowing the Zn metal to cycle for more than 1700 h and to achieve high Coulombic efficiency (99.6%). Zn||V2O5 full cell using PIM-1 coated Zn also shows 7 times extended cycle life compared to the cell using bare Zn. The findings in this report is believed to provide the potentials of microporous materials as an effective candidate that alleviate the dendritic growth of Zn. |
