MOF-derived defect-rich CeO2 as ion-selective smart artificial SEI for dendrite-free Zn-ion battery
MOF-derived defect-rich CeO2 as ion-selective smart artificial SEI for dendrite-free Zn-ion battery
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DOI：
10.1016/j.cej.2022.138769
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发表时间：
2023
影响因子：
15.1
通讯作者：
Lei Wang
中科院分区：
文献类型：
--
作者：
Pengxian Li;Junfeng Ren;Caixia Li;Jiaxu Li;Kai Zhang;Tingting Wu;Bin Li;Lei Wang
• Crystal defects in MOF-CeO 2 as active sites for Zn 2+ transfer. • High selectivity to cations and shielding effect to anions by the artificial SEI. • The desolvation of Zn[(H 2 O) 6 2+ and balance Zn-ion flux by pores. • High-capacity retention after 10000 cycles for Zn||MnVO full battery. Interface engineering is considered as an effective way to inhibit dendrite growth and side reactions in rechargeable zinc ion batteries (ZIBs). Herein, to explore the best treatment routes on how to construct multi-functional protective layers with MOF-based nanomaterials, defect-rich CeO 2 polycrystals are designed with Ce-MOF-808 precursor as ion-selective smart artificial SEI for ZIBs. Interestingly, crystal defects which can provide active sites for Zn 2+ transfer, are introduced to MOF-CeO 2 via pyrolysis. Furthermore, the negative Zeta potential gives high selectivity to cations and shielding effect to anions, inhibiting the side reactions. Besides, MOF-CeO 2 can promote the desolvation process of Zn[(H 2 O) 6 2+ and balance Zn-ion flux by pores. Impressively, synergistic effects on dendrite inhibition by chemical stability, crystal defects, surface charge properties, and hierarchically porous structure are investigated comprehensively. Therefore, MOF-CeO 2 @Zn anode exhibited ultra-stable plating/stripping behavior (more than 3200 h) and high Coulomb efficiency (99.5% at 2 mA cm -2 ). This multi-functional protective layer also significantly improves the overall performance of Zn||MnVO full battery, with high-capacity retention at 5 A g -1 after 10000 cycles.
