Selective Ion Transport Layer for Stable Aqueous Zinc-Ion Batteries

Young Hoon Lee, Yunseo Jeoun, Ji Hwan Kim, Jaehyuk Shim, Kwang Soon Ahn, Seung Ho Yu, Yung Eun Sung

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The limited lifespan of aqueous zinc-ion batteries (with vanadium-oxide based cathodes) is constrained by practical applications due to corrosion accelerated by vanadium ions leaching from the cathode and uneven dendrite growth on the zinc metal anode. To address these issues, the difference in size between hydrated zinc ions (4.30 Å) in electrolyte and vanadium ions (8.34 Å) is considered. Uniformly coating the MOF-801 nanoparticles (with a pore size of 6.0 Å) on the zinc foil formed a selective ion transport layer. The uniform zinc ion flux generated by the selective ion transport layer allows hydrated zinc ions to be transported evenly and promotes uniform zinc deposition, leading to a low overpotential (17.4 mV) and high cycle stability (1000 h) in the symmetric cell. Moreover, the selective ion transport layer, having pores smaller than vanadium ions, blocked vanadium ions from migrating toward the zinc anode, thereby reducing its corrosion and contributing to a capacity retention of 86% after 2000 cycles under full-cell conditions. This study demonstrates that the pore size of the coating layer influences the long-term stability of aqueous zinc-ion batteries and may serve as a guide when selecting interface modification materials for various metal batteries.

Original languageEnglish
JournalAdvanced Functional Materials
DOIs
Publication statusAccepted/In press - 2023

Bibliographical note

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Keywords

  • aqueous zinc-ion battery
  • dendrite
  • metal-organic framework
  • vanadium oxide
  • zinc

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Biomaterials
  • General Materials Science
  • Condensed Matter Physics
  • Electrochemistry

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