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Related Experiment Video

Updated: Jun 10, 2026

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
11:04

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

Synergistic cathode-anode modulation via a multifunctional ionic liquid additive for high-performance zinc‑iodine

Qian Zhang1, Kaidun Zhao1, Wei Zhu2

  • 1School of Materials Science and Engineering, School of Cable Engineering, Henan Key Laboratory of Advanced Cable Materials and Intelligent Manufacturing, Henan Institute of Technology, Xinxiang 453003, China.

Journal of Colloid and Interface Science
|June 8, 2026
PubMed
Summary

A novel ionic liquid additive, [HEMIM][OTf], enhances aqueous zinc-iodine battery performance by stabilizing both electrodes. This additive suppresses dendrite growth and polyiodide shuttling, leading to improved cycling stability and capacity retention for large-scale energy storage.

Keywords:
Aqueous zinc‑iodine batteriesInterface engineeringMultifunctional electrolyte additivesShuttle effectZn anode

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Zinc-Sponge Battery Electrodes that Suppress Dendrites
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Published on: September 29, 2020

Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Aqueous zinc-iodine batteries (ZIBs) offer safe and cost-effective large-scale energy storage.
  • Key challenges include zinc anode dendrite growth, hydrogen evolution, and cathode polyiodide shuttle.
  • These issues limit the commercial viability and long-term stability of ZIBs.

Purpose of the Study:

  • To introduce a multifunctional ionic liquid additive, 1-hydroxyethyl-3-methylimidazolium trifluoromethylsulfonate ([HEMIM][OTf]), for synergistic interfacial stabilization in ZIBs.
  • To investigate the additive's impact on both zinc anode and iodine cathode performance.
  • To demonstrate enhanced cycling stability and capacity retention in ZIBs.

Main Methods:

  • Computational and experimental investigations were combined to analyze the additive's mechanism.
  • The study examined the role of the [HEMIM][OTf] cation and anion in modulating electrode interfaces.
  • Performance was evaluated using Zn║Zn symmetric cells and Zn║I2 full cells under various conditions.

Main Results:

  • The OTf- anion modified the Zn2+ solvation sheath, suppressing side reactions.
  • The HEMIM+ cation formed a water-lean layer on the Zn anode, mitigating hydrogen evolution and corrosion.
  • In situ formed ZnF2-rich layer inhibited dendrite growth, enabling uniform Zn deposition.
  • HEMIM+ anchored I3- at the cathode, reducing polyiodide shuttling and enhancing active material utilization.
  • Zn║I2 cells achieved 120.5 mAh g-1 after 4100 cycles at 2.0 A g-1 with 90.5% retention.

Conclusions:

  • The [HEMIM][OTf] additive effectively enhances ZIB performance by simultaneously stabilizing both electrodes.
  • This ionic liquid additive strategy offers a promising approach for developing high-performance and durable ZIBs.
  • The findings provide a new pathway for synergistic interfacial optimization in aqueous metal-ion batteries.