Issue 44, 2023

Building fast and selective Zn ion channels for highly stable quasi-solid-state Zn-ion batteries

Abstract

Quasi-solid-state Zn-ion batteries (QSSZIBs) with gel electrolytes hold practical promise to deliver a high energy density because of their high safety and ionic conductivity of gel electrolytes. However, the sluggish and the low selectivity of Zn ion transportation leads to unsatisfactory cycle life of QSSZIBs. Herein, a Zn ion channel was constructed by confining the gel electrolyte in intercalated halloysite nanotubes. The resultant Zn ion channels show fast and highly selective Zn ion transportation and therefore suppress hydrogen evolution, Zn dendrite growth and formation of Zn4SO4(OH)6·χH2O during cycling. The QSSZIBs exhibit an excellent Zn plating/stripping coulombic efficiency of ∼99.7% in 400 cycles and over 1600 h cycle life at a current density of 1 mA cm−2 and a corresponding areal capacity of 1 mA h cm−2. Building Zn ion channels for fast and selective Zn ion transportation can direct development of QSSZIBs with high cycling stability. Based on the aforementioned advantages, the assembled Zn/i-HNTs@PAM/I2 full battery exhibits an exceptionally long cycle life of 8000 cycles at a high current density of 8 C.

Graphical abstract: Building fast and selective Zn ion channels for highly stable quasi-solid-state Zn-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
15 Mey 2023
Accepted
27 Sep 2023
First published
30 Sep 2023

J. Mater. Chem. A, 2023,11, 23881-23887

Building fast and selective Zn ion channels for highly stable quasi-solid-state Zn-ion batteries

C. Kao, J. Liu, C. Ye, S. Zhang, J. Hao and S. Qiao, J. Mater. Chem. A, 2023, 11, 23881 DOI: 10.1039/D3TA02866F

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