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

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 lif...

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Published inJournal of materials chemistry. A, Materials for energy and sustainability Vol. 11; no. 44; pp. 23881 - 23887
Main Authors Kao, Chun-Chuan, Liu, Jiahao, Ye, Chao, Zhang, Shao-Jian, Hao, Junnan, Qiao, Shi-Zhang
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 14.11.2023
Subjects
Batteries
Current density
Electrolytes
Hydrogen evolution
Ion channels
Ion currents
Nanotechnology
Nanotubes
Rechargeable batteries
Solid state
Transportation
Zinc
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Summary: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 Zn 4 SO 4 (OH) 6 · χ H 2 O 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/I 2 full battery exhibits an exceptionally long cycle life of 8000 cycles at a high current density of 8 C. Ordered ion channels constructed by confining a gel electrolyte in intercalated halloysite nanotubes exhibit fast and selective Zn ion transportation and therefore enhance the cycling stability of the quasi-solid-state Zn-ion batteries.
Bibliography:https://doi.org/10.1039/d3ta02866f
Electronic supplementary information (ESI) available. See DOI
Chao Ye received his PhD in chemical engineering from The University of Adelaide in 2020. He is currently a DECRA Fellow in Professor Shi-Zhang Qiao's group at The University of Adelaide, Australia. His research area is energy storage and conversion, including metal-sulfur batteries, aqueous Zn-ion batteries, and computational electrochemistry.
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ISSN:2050-7488
2050-7496
DOI:10.1039/d3ta02866f