Chen, R; Zhang, W; Guan, C; Zhou, Y; Gilmore, I; Tang, H; Zhang, Z; Dong, H; Dai, Y; Du, Z; Gao, X; Zong, W; Xu, Y; Jiang, P; Liu, J; Zhou, F; Li, J; Wang, X; He, G (2024) Rational design of an in-situ polymer-inorganic hybrid solid electrolyte interphase for realising stable Zn metal anode under harsh conditions. Angewandte Chemie International Edition, 63 (21). e202401987

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Abstract

In-depth understanding the solid electrolyte interphase (SEI) composition-SEI property-electrochemical performance relationship is the basis of developing a reliable hybrid SEI to stablize the Zn metal anode-electrolyte interface, but it remains unclear in rechargeable aqueous zinc ion batteries. Herein, an SEI-forming electrolyte based on 2M Zn(CF3SO3)2-0.2M acrylamide-0.2M ZnSO4 is proposed. A robust organic polyacrylamide-inorganic Zn4SO4(OH)6.xH2O hybrid SEI is in-situ constructed on Zn anode through controllable polymerization of acrylamide and coprecipitation reaction of SO42- with Zn2+ and OH-. For the first time, the underlying SEI composition-SEI property-electrochemical performance relationship is systematically investigated and correlated. The results showed that only organic-inorganic hybrid SEI integrating high modulus of the inorganic component with high toughness of the organic ingredient is capable of realizing high reversibility with 99% coulombic efficiency and long-term interfacial stability, even under ultrahigh current density and areal density (30 mA cm-2-30 mAh cm-2). The full Zn//NVO cell with this electrolyte also exhibits a high capacity retention of 82% following 800 cycles at 1 A g-1. This work will provide guidance for the rational design of SEI layers in rechargeable queous zinc ion batteries.

Item Type:	Article
Subjects:	Advanced Materials > Electrochemistry
Divisions:	Chemical & Biological Sciences
Identification number/DOI:	10.1002/anie.202401987
Last Modified:	23 Sep 2024 08:53
URI:	https://eprintspublications.npl.co.uk/id/eprint/10046