Synergistically regulating the separator pore structure and surface property toward dendrite-free and high-performance aqueous zinc-ion batteries

[Display omitted] •Synergistic modification of the separator's pore feature and surface property.•Spontaneously enhance Zn2+ flux homogeneity and accelerate Zn2+ transport kinetics.•Achieving an impressive cycling lifespan of Zn metal anode for 500 h at 10 mA cm−2/4 mAh cm−2. As an emerging ele...

Full description

Saved in:
Bibliographic Details
Published in:Journal of colloid and interface science 2024-02, Vol.656, p.566-576
Main Authors: Zhang, Yaxin, Yang, Shanchen, Zhu, Ying-Jie, Li, Dandan, Cheng, Long, Li, Heng, Wang, Zhaohui
Format: Article
Language:English
Subjects:
Cellulose nanofibers
Ion transport
Separator membrane
Zinc-ion battery
Zn anode
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •Synergistic modification of the separator's pore feature and surface property.•Spontaneously enhance Zn2+ flux homogeneity and accelerate Zn2+ transport kinetics.•Achieving an impressive cycling lifespan of Zn metal anode for 500 h at 10 mA cm−2/4 mAh cm−2. As an emerging electrochemical device, aqueous zinc-ion batteries (ZIBs) present promising potential in safe and large-scale energy storage. However, the large pores of commercial glass fiber (GF) separators result in uneven Zn2+ ion flux, leading to severe dendrite growth issues of Zn metal anodes. Herein, we integrated a multifunctional layer on the GF separator that can synergistically regulate the pore feature and surface property of commercial GF separators. Such modification layer, composed of nanocellulose and SiO2 nanoparticles, exhibited uniform nanoporous structure and abundant negatively charged polar functional groups. These features allow regulating the distribution of Zn2+ ions at the separator-anode interface, facilitating stable and uniform Zn nucleation and growth. Moreover, the electrostatic interaction between the negatively charged functional groups and Zn2+ ions enhanced the Zn2+ ion transport kinetics, preventing the Zn dendrites formation and adverse reactions. Consequently, the modified electrolyte-filled GF separator showed an increased Zn2+ ion transference number of 0.65. The symmetric Zn//Zn batteries utilizing such a separator achieved an impressive cycling life of 500 h at a high current density/capacity of 10 mA cm−2/4 mAh cm−2, nearly nine times longer than the battery using the unmodified GF separator (
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2023.11.132