Zn-Rejuvenated and SEI-Regulated Additive in Zinc Metal Battery via the Iodine Post-Functionalized Zeolitic Imidazolate Framework-90

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Article number2300627
Journal / PublicationAdvanced Energy Materials
Volume13
Issue number28
Online published11 Jun 2023
Publication statusPublished - 27 Jul 2023

Abstract

Due to the high abundance of their components, low cost, and high safety, zinc-based batteries open up new vistas for large-scale energy storage. However, their stability, lifetime, and reversibility are impaired by passivation and dendrite growth of the Zn anode. Here, this challenge is circumvented by an iodine post-functionalized zeolitic imidazolate framework-90 (ZIF-90-I) additive, in which the polycation absorbed on Zn anode can regulate solid-electrolyte interphase (SEI) formation in the 1 M Zn(TFSI)2 electrolyte and induce Zn2+ uniform deposition. Moreover, the I3-/I- redox can rejuvenate dead Zn and inhibit dendrites. With the ZIF-90-I additive, Zn plating/stripping at 99.5% Coulombic efficiency for 120 cycles is obtained in Zn||Ti cells at 20 mA cm-2/1 mAh cm-2. In addition, Zn||Zn cells show steady cycling for 1200 h at 5 mA cm-2/1 mAh cm-2 with stable overpotentials. The utilization rate of Zn reaches up to 68.6%. In situ optical microscopy reveals smooth, uniform Zn plating, and the Zn-rejuvenated function from the I3-/I- redox couple. The refreshed SEI with the increase of Zn-rich complexes, and nitrides from adsorbed polycations, are uniform and ZnF2-rich in the Zn(TFSI)2 + ZIF-90-I electrolyte. The full Zn||air cells in Zn(TFSI)2 + ZIF-90-I electrolyte exhibit excellent cycling stability with stable polarization voltage at 0.1 mA/0.05 mAh cm-2. © 2023 Wiley-VCH GmbH.

Research Area(s)

  • electrolyte additives, dendrite inhibition, solid-electrolyte interphase, ZIF-90-I, zinc ion batteries, LONG-LIFE, DENDRITE FORMATION, ANODE, CHALLENGES, CAPACITY, LAYER

Citation Format(s)

Zn-Rejuvenated and SEI-Regulated Additive in Zinc Metal Battery via the Iodine Post-Functionalized Zeolitic Imidazolate Framework-90. / Zhao, Yuwei; Hong, Hu; Zhong, Leheng et al.
In: Advanced Energy Materials, Vol. 13, No. 28, 2300627, 27.07.2023.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review