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Related Experiment Video

Updated: Jan 18, 2026

A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery
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A Wide-Temperature-Range Electrolyte for all Vanadium Flow Batteries.

Jingyu Zhai1, Xiao Li2, Kun Xi1

  • 1State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Intelligent Design and Manufacturing for Hydrogen Energy Materials, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.

Chemistry, an Asian Journal
|June 4, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a wide-temperature-range (WTR) electrolyte for all-vanadium flow batteries (VFBs). This advancement enables stable VFB operation in extreme temperatures, expanding their use in diverse climates.

Keywords:
AdditivesAll vanadium flow batteryThermal stabilityVanadium electrolyte

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • All-vanadium flow batteries (VFBs) offer scalable, long-duration energy storage.
  • VFB performance is limited by vanadium electrolyte instability at extreme temperatures (-5°C to 45°C).
  • Precipitation in electrolytes restricts VFB geographical adaptability.

Purpose of the Study:

  • To develop a wide-temperature-range (WTR) electrolyte for VFBs.
  • To overcome the thermal stability limitations of conventional vanadium electrolytes.
  • To enhance the operational temperature window of VFBs.

Main Methods:

  • Introduced four additives (benzene sulfonate, phosphate salts, halide salts, imidazole) into a conventional vanadium electrolyte.
  • Conducted electrochemical characterization to assess performance.
  • Tested electrolyte stability and operational capability across a wide temperature range (-5°C to 45°C).

Main Results:

  • The WTR electrolyte demonstrated stable operation and storage between -5°C and 45°C.
  • Electrochemical performance at 100 mA cm⁻² was comparable to conventional electrolytes.
  • No performance sacrifice was observed with the WTR electrolyte.

Conclusions:

  • A viable strategy for designing WTR vanadium electrolytes was established.
  • The WTR electrolyte significantly expands the operational temperature range of VFBs.
  • This research provides critical insights for deploying VFBs in diverse climatic environments.